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Biosorption using modified biochar has been increasingly adopted for the sustainable removal of uranium-contaminated from an aqueous solution. In this research study, the facile preparation and surface characteristics of magnetized biochar derived from waste watermelon rind to treat U(VI) contaminated water were investigated. The porosity, specific surface area, adsorption capacity, reusability, and stability were effectively improved after the magnetization of biochar. The kinetics and isotherm studies found that the U(VI) adsorption was rate-limiting monolayer sorption on the homogeneous surface of magnetized watermelon rind biochar (MWBC). The maximum adsorption capacity was found to be 323.56 mg of U(VI) per g of MWBC at pH 4.0 and 293 K that was higher than that of watermelon rind biochar (WBC) (135.86 mg g−1) and other sourced biochars. The surface interaction mechanism, environmental feasibility, applicability for real-filed water treatment studied in the electromagnetic semi-batch column, and reusability of MWBC were also explored. Furthermore, salient raised the ion exchange and complexation action capacity of MWBC due to the presence of Fe oxide. The overall results indicated that MWBC was not only inexpensive and had a high removal capacity for U(VI), but it also easily enabled phase separation from an aqueous solution, with more than three times reusability at a minimum removal capacity of 99%.
Lakshmi Prasanna Lingamdinne; Jong-Soo Choi; Ganesh Kumar Reddy Angaru; Rama Rao Karri; Jae-Kyu Yang; Yoon-Young Chang; Janardhan Reddy Koduru. Magnetic-watermelon rinds biochar for uranium-contaminated water treatment using an electromagnetic semi-batch column with removal mechanistic investigations. Chemosphere 2021, 286, 131776 .
AMA StyleLakshmi Prasanna Lingamdinne, Jong-Soo Choi, Ganesh Kumar Reddy Angaru, Rama Rao Karri, Jae-Kyu Yang, Yoon-Young Chang, Janardhan Reddy Koduru. Magnetic-watermelon rinds biochar for uranium-contaminated water treatment using an electromagnetic semi-batch column with removal mechanistic investigations. Chemosphere. 2021; 286 ():131776.
Chicago/Turabian StyleLakshmi Prasanna Lingamdinne; Jong-Soo Choi; Ganesh Kumar Reddy Angaru; Rama Rao Karri; Jae-Kyu Yang; Yoon-Young Chang; Janardhan Reddy Koduru. 2021. "Magnetic-watermelon rinds biochar for uranium-contaminated water treatment using an electromagnetic semi-batch column with removal mechanistic investigations." Chemosphere 286, no. : 131776.
Carbonaceous material, especially carbon nanotubes (CNTs), have incredible properties, such as high thermal and mechanical stabilities, good catalytic and adsorption capabilities. In recent years, hybrid nanocomposites have attained considerable attention, due to the combination of unique organic and inorganic elements in a single material. Hence, these nanocomposites have been employed for various applications, such as drug delivery, sensors, corrosion protection materials, flame retardant additives, and pollutant adsorbent. These nanocomposites can be fabricated through various approaches that include powder metallurgy, solution processing, reaction processing, melt processing, electrochemical, and many more. This present review mainly summarizes the various techniques for the fabrication, separation, and purification of CNTs and their nanocomposites, especially CNTs-based polymer and CNTs-based metals/metal oxides nanocomposites. Besides, effects of CNTs embedded with polymers (such as polypyrrole, poly-aniline, and poly-thiophene, etc.) and metals/metal oxides (such as manganese oxide (MnO2), copper (Cu), gold (Au), platinum (Pt), etc.) and how they can be employed toward innovative devices with fascinating properties for a broad range of applications are thoroughly discussed. Further, , industrial applications of CNTs-based polymer/ metal/metal oxides nanocomposites have been reviewed and discussed.
Fahad Saleem Ahmed Khan; N. M. Mubarak; Mohammad Khalid; Mohammad Mansoob Khan; Yie Hua Tan; Rashmi Walvekar; E. C. Abdullah; Rama Rao Karri; Muhammad Ekhlasur Rahman. Comprehensive review on carbon nanotubes embedded in different metal and polymer matrix: fabrications and applications. Critical Reviews in Solid State and Materials Sciences 2021, 1 -28.
AMA StyleFahad Saleem Ahmed Khan, N. M. Mubarak, Mohammad Khalid, Mohammad Mansoob Khan, Yie Hua Tan, Rashmi Walvekar, E. C. Abdullah, Rama Rao Karri, Muhammad Ekhlasur Rahman. Comprehensive review on carbon nanotubes embedded in different metal and polymer matrix: fabrications and applications. Critical Reviews in Solid State and Materials Sciences. 2021; ():1-28.
Chicago/Turabian StyleFahad Saleem Ahmed Khan; N. M. Mubarak; Mohammad Khalid; Mohammad Mansoob Khan; Yie Hua Tan; Rashmi Walvekar; E. C. Abdullah; Rama Rao Karri; Muhammad Ekhlasur Rahman. 2021. "Comprehensive review on carbon nanotubes embedded in different metal and polymer matrix: fabrications and applications." Critical Reviews in Solid State and Materials Sciences , no. : 1-28.
Methylene blue (MB) dye is used in various industries; however, it is detrimental to both humans and the environment. This study reports on the adsorptive removal of methylene blue (MB) using a magnetically modified agro-waste: iron oxide loaded Lonicera japonica flower powder (IOLJF). The interaction effects of operating variables such as the initial MB concentration, temperature, dosage of IOLJF, and pH on the IOLJF removal efficiency for MB were investigated systematically and statistically. The results showed that the adsorptive removal of MB was explained well by the pseudo-second-order (PSO) kinetic model and the Langmuir and Freundlich isotherms. The maximum uptake capacity was 403.44 mg/g at pH 6.0 and 293 K. The MB adsorption process was complex on the surface of the IOLJF. To comprehend the essential characteristics and envision the removal efficiency in the batch adsorption process, two approaches were used, namely the response surface methodology (RSM) and the data-driven adaptive neuro-fuzzy inference system (ANFIS). The RSM (R2 = 0.9782) and ANFIS (R2 = 0.9964) model predictions were both good and comparable with the experimental data. Further, it was found that the magnetic biomass could be re-used for up to seven cycles without losing its efficacy of ~95%. Overall, the results indicated that the IOLJF had sufficient potential for wastewater treatment.
Lakshmi Prasanna Lingamdinne; Rama Rao Karri; Mohammad Rizwan Khan; Yoon-Young Chang; Janardhan Reddy Koduru. Evaluation of surface phenomena of magnetic biomass for dye removal via surface modeling. Journal of Environmental Chemical Engineering 2021, 9, 105953 .
AMA StyleLakshmi Prasanna Lingamdinne, Rama Rao Karri, Mohammad Rizwan Khan, Yoon-Young Chang, Janardhan Reddy Koduru. Evaluation of surface phenomena of magnetic biomass for dye removal via surface modeling. Journal of Environmental Chemical Engineering. 2021; 9 (5):105953.
Chicago/Turabian StyleLakshmi Prasanna Lingamdinne; Rama Rao Karri; Mohammad Rizwan Khan; Yoon-Young Chang; Janardhan Reddy Koduru. 2021. "Evaluation of surface phenomena of magnetic biomass for dye removal via surface modeling." Journal of Environmental Chemical Engineering 9, no. 5: 105953.
In the present study, the adsorptive removal of organophosphate diazinon pesticide using porous pumice adsorbent was experimentally investigated in a batch system, modelled and optimized upon response surface methodology (RSM) and artificial neural network-genetic algorithm (ANN-GA), fitted to isotherm, kinetic and thermodynamic models. The quantification of adsorbent elements was determined using EDX. XRD analysis was utilized to study the crystalline properties of adsorbent. The FT-IR spectra were taken from adsorbent before and after adsorption to study the presence and changes in functional groups. The constituted composition of the adsorbent was determined by XRF. Also, the ionic strength and adsorbent reusability were explored. The influences of operational parameters like pH, initial pesticide concentration, adsorbent dosage and contact time were investigated systematically. ANN-GA and RSM techniques were used to identify the optimal process variables that result in the highest removal. Based on the RSM approach, the optimization conditions for maximum removal efficiency is obtained at pH = 3, adsorbent dosage = 4 g/L, contact time = 30 min, and initial pesticide concentration = 6.2 mg/L. To accurately identify the parameters of nonlinear isotherm and kinetic models, a hybrid evolutionary differential evolution optimization (DEO) is applied. Results indicated that the equilibrium adsorption data were best fitted with Langmuir and Temkin isotherms and kinetic data were well described by pseudo-first and second-order kinetic models. The thermodynamic parameters such as entropy, enthalpy and Gibbs energy were evaluated to study the effect of temperature on pesticide adsorption.
Mohammad Hadi Dehghani; Amir Hessam Hassani; Rama Rao Karri; Bahareh Younesi; Mansoureh Shayeghi; Mehdi Salari; Ahmad Zarei; Mahmood Yousefi; Zoha Heidarinejad. Process optimization and enhancement of pesticide adsorption by porous adsorbents by regression analysis and parametric modelling. Scientific Reports 2021, 11, 1 -15.
AMA StyleMohammad Hadi Dehghani, Amir Hessam Hassani, Rama Rao Karri, Bahareh Younesi, Mansoureh Shayeghi, Mehdi Salari, Ahmad Zarei, Mahmood Yousefi, Zoha Heidarinejad. Process optimization and enhancement of pesticide adsorption by porous adsorbents by regression analysis and parametric modelling. Scientific Reports. 2021; 11 (1):1-15.
Chicago/Turabian StyleMohammad Hadi Dehghani; Amir Hessam Hassani; Rama Rao Karri; Bahareh Younesi; Mansoureh Shayeghi; Mehdi Salari; Ahmad Zarei; Mahmood Yousefi; Zoha Heidarinejad. 2021. "Process optimization and enhancement of pesticide adsorption by porous adsorbents by regression analysis and parametric modelling." Scientific Reports 11, no. 1: 1-15.
In the present study, reactive red 198 (RR198) dye removal from aqueous solutions by adsorption using municipal solid waste (MSW) compost ash was investigated in batch mode. SEM, XRF, XRD, and BET/BJH analyses were used to characterize MSW compost ash. CNHS and organic matter content analyses showed a low percentage of carbon and organic matter to be incorporated in MSW compost ash. The design of adsorption experiments was performed by Box–Behnken design (BBD), and process variables were modeled and optimized using Box–Behnken design-response surface methodology (BBD-RSM) and genetic algorithm-artificial neural network (GA-ANN). BBD-RSM approach disclosed that a quadratic polynomial model fitted well to the experimental data (F-value = 94.596 and R2 = 0.9436), and ANN suggested a three-layer model with test-R2 = 0.9832, the structure of 4-8-1, and learning algorithm type of Levenberg–Marquardt backpropagation. The same optimization results were suggested by BBD-RSM and GA-ANN approaches so that the optimum conditions for RR198 absorption was observed at pH = 3, operating time = 80 min, RR198 = 20 mg L−1 and MSW compost ash dosage = 2 g L−1. The adsorption behavior was appropriately described by Freundlich isotherm, pseudo-second-order kinetic model. Further, the data were found to be better described with the nonlinear when compared to the linear form of these equations. Also, the thermodynamic study revealed the spontaneous and exothermic nature of the adsorption process. In relation to the reuse, a 12.1% reduction in the adsorption efficiency was seen after five successive cycles. The present study showed that MSW compost ash as an economical, reusable, and efficient adsorbent would be desirable for application in the adsorption process to dye wastewater treatment, and both BBD-RSM and GA-ANN approaches are highly potential methods in adsorption modeling and optimization study of the adsorption process. The present work also provides preliminary information, which is helpful for developing the adsorption process on an industrial scale.
Mohammad Hadi Dehghani; Mehdi Salari; Rama Rao Karri; Farshad Hamidi; Roghayeh Bahadori. Process modeling of municipal solid waste compost ash for reactive red 198 dye adsorption from wastewater using data driven approaches. Scientific Reports 2021, 11, 1 -20.
AMA StyleMohammad Hadi Dehghani, Mehdi Salari, Rama Rao Karri, Farshad Hamidi, Roghayeh Bahadori. Process modeling of municipal solid waste compost ash for reactive red 198 dye adsorption from wastewater using data driven approaches. Scientific Reports. 2021; 11 (1):1-20.
Chicago/Turabian StyleMohammad Hadi Dehghani; Mehdi Salari; Rama Rao Karri; Farshad Hamidi; Roghayeh Bahadori. 2021. "Process modeling of municipal solid waste compost ash for reactive red 198 dye adsorption from wastewater using data driven approaches." Scientific Reports 11, no. 1: 1-20.
The COVID-19 outbreak has completely devastated the economies of the major countries and disrupted many people’s lives. Despite the huge outbreak and devastation brought by the pandemic, there are a growing number of countries that has been able to control the spread of the outbreak, signifying a strong recovery. Brunei is one of the few countries that has been able to control the outbreak and “flatten the curve”. This paper explores the rate of growth of COVID-19 cases in Brunei and highlights resilient actions that have been taken to mitigate further infection and contain outbreak nationally. The Sultanate of Brunei has taken various timely actions to minimise the risk of further outbreak and implemented serious measures to support any infected patients in the country. Brunei is also one of the few countries in the world to have contained the spread of the infection with no newly infected local cases recorded for nearly 6 months. This paper also takes into account the new COVID-19 cases that were imported cases from returning travellers to Brunei travellers and how the authorities handled these new cases. The current observations in this paper thus serves as a reference for notable policies to contain future pandemics and in order to achieve a sustainable society.
Malai Zeiti Binti Sheikh Abdul Hamid; Rama Rao Karri. Overview of Preventive Measures and Good Governance Policies to Mitigate the COVID-19 Outbreak Curve in Brunei. Resilience and Aging 2021, 115 -140.
AMA StyleMalai Zeiti Binti Sheikh Abdul Hamid, Rama Rao Karri. Overview of Preventive Measures and Good Governance Policies to Mitigate the COVID-19 Outbreak Curve in Brunei. Resilience and Aging. 2021; ():115-140.
Chicago/Turabian StyleMalai Zeiti Binti Sheikh Abdul Hamid; Rama Rao Karri. 2021. "Overview of Preventive Measures and Good Governance Policies to Mitigate the COVID-19 Outbreak Curve in Brunei." Resilience and Aging , no. : 115-140.
This work intended to enhance the unique and outstanding properties of lanthanum by synthesizing its nanocomposite. A lanthanum-based nanocomposite was prepared by a simple and cost-effective “co-precipitation” method. Lanthanum nitrate (La (NO3)3) and zinc nitrate (Zn (NO3)2) were used as precursors. The lanthanum/zinc oxide nano composite formed was then calcined at 450 °C for 4 h in order to obtain a fine powder with size in the nano range of 1–100 nm. Characterization of the prepared catalyst was done by ultraviolet/visible spectroscopy, Fourier transform infrared spectroscopy, and photoluminescence. Crystallinity and morphology were found by X-ray diffraction and scanning electron microscopy. The synthesized nanocomposite material was also tested for heterogeneous catalytic applications of 4-nitrophenol (4-NP) reduction into 4-aminophenol (4-AP). It was found to be successful in complete reduction of 4-NP with enhanced catalytic performance.
Ikram Ahmad; Muhammad Jamal; Miara Iftikhar; Awais Ahmad; Shahid Hussain; Humaira Asghar; Muhammad Saeed; Ammar Yousaf; Rama Karri; Nada Al-Kadhi; Mohamed Ouladsmane; Ayman Ghfar; Safia Khan. Lanthanum-Zinc Binary Oxide Nanocomposite with Promising Heterogeneous Catalysis Performance for the Active Conversion of 4-Nitrophenol into 4-Aminophenol. Coatings 2021, 11, 537 .
AMA StyleIkram Ahmad, Muhammad Jamal, Miara Iftikhar, Awais Ahmad, Shahid Hussain, Humaira Asghar, Muhammad Saeed, Ammar Yousaf, Rama Karri, Nada Al-Kadhi, Mohamed Ouladsmane, Ayman Ghfar, Safia Khan. Lanthanum-Zinc Binary Oxide Nanocomposite with Promising Heterogeneous Catalysis Performance for the Active Conversion of 4-Nitrophenol into 4-Aminophenol. Coatings. 2021; 11 (5):537.
Chicago/Turabian StyleIkram Ahmad; Muhammad Jamal; Miara Iftikhar; Awais Ahmad; Shahid Hussain; Humaira Asghar; Muhammad Saeed; Ammar Yousaf; Rama Karri; Nada Al-Kadhi; Mohamed Ouladsmane; Ayman Ghfar; Safia Khan. 2021. "Lanthanum-Zinc Binary Oxide Nanocomposite with Promising Heterogeneous Catalysis Performance for the Active Conversion of 4-Nitrophenol into 4-Aminophenol." Coatings 11, no. 5: 537.
Bioethanol produced from biological resources is considered as an alternative, renewable, and sustainable energy source in the context of the circular economy. Moreover, bioethanol is a biofuel that has similar energy content to gasoline, but emits less toxic pollutants compared to fossil fuels. Yet bioethanol must be anhydrous to be mixed with regular gasoline and is then utilized as a vehicle fuel. Different techniques have been developed to obtain anhydrous ethanol. Here, we compare techniques for dehydration of bioethanol, including adsorption and distillation. We present the performance of the process, product recovery, and energy consumption of the pressure swing adsorption method, which is effective and widely used.
Samira Karimi; Rama Rao Karri; Mohammad Tavakkoli Yaraki; Janardhan Reddy Koduru. Processes and separation technologies for the production of fuel-grade bioethanol: a review. Environmental Chemistry Letters 2021, 1 -18.
AMA StyleSamira Karimi, Rama Rao Karri, Mohammad Tavakkoli Yaraki, Janardhan Reddy Koduru. Processes and separation technologies for the production of fuel-grade bioethanol: a review. Environmental Chemistry Letters. 2021; ():1-18.
Chicago/Turabian StyleSamira Karimi; Rama Rao Karri; Mohammad Tavakkoli Yaraki; Janardhan Reddy Koduru. 2021. "Processes and separation technologies for the production of fuel-grade bioethanol: a review." Environmental Chemistry Letters , no. : 1-18.
Numerous contaminants in huge amounts are discharged to the environment from various anthropogenic activities. Waterbodies are one of the major receivers of these contaminants. The contaminated water can pose serious threats to humans and animals, by distrubing the ecosystem. In treating the contaminated water, adsorption processes have attained significant maturity due to lower cost, easy operation and environmental friendliness. The adsorption process uses various adsorbent materials and some of emerging adsorbent materials include carbon- and polymer-based magnetic nanocomposites. These hybrid magnetic nanocomposites have attained extensive applications in water treatment technologies due to their magnetic properties as well as combination of unique characteristics of organic and inorganic elements. Carbon- and polymer-related magnetic nanocomposites are more adapted materials for the removal of various kinds of contaminants from waterbodies. These nanocomposites can be produced via different approaches such as filling, pulse-laser irradiation, ball milling, and electro-spinning. This comprehensive review is compiled by reviewing published work of last the latest recent 3 years. The review article extensively focuses on different approaches for producing various carbon- and polymer-based magnetic nanocomposites, their merits and demerits and applications for sustainable water purification. More specifically, use of carbon- and polymer-based magnetic nanocomposites for removal of heavy metal ions and dyes is discussed in detail, critically analyzed and compared with other technologies. In addition, commercial viability in terms of regeneration of adsorbents is also reviewed. Furthermore, the future challenges and prospects in employing magnetic nanocomposites for contaminant removal from various water sources are presented.
Ahsan Mehmood; Fahad Saleem Ahmed Khan; Nabisab Mujawar Mubarak; Yie Hua Tan; Rama Rao Karri; Mohammad Khalid; Rashmi Walvekar; Ezzat Chan Abdullah; Sabzoi Nizamuddin; Shaukat Ali Mazari. Magnetic nanocomposites for sustainable water purification—a comprehensive review. Environmental Science and Pollution Research 2021, 28, 19563 -19588.
AMA StyleAhsan Mehmood, Fahad Saleem Ahmed Khan, Nabisab Mujawar Mubarak, Yie Hua Tan, Rama Rao Karri, Mohammad Khalid, Rashmi Walvekar, Ezzat Chan Abdullah, Sabzoi Nizamuddin, Shaukat Ali Mazari. Magnetic nanocomposites for sustainable water purification—a comprehensive review. Environmental Science and Pollution Research. 2021; 28 (16):19563-19588.
Chicago/Turabian StyleAhsan Mehmood; Fahad Saleem Ahmed Khan; Nabisab Mujawar Mubarak; Yie Hua Tan; Rama Rao Karri; Mohammad Khalid; Rashmi Walvekar; Ezzat Chan Abdullah; Sabzoi Nizamuddin; Shaukat Ali Mazari. 2021. "Magnetic nanocomposites for sustainable water purification—a comprehensive review." Environmental Science and Pollution Research 28, no. 16: 19563-19588.
Phenolic pollution is very common, and toxic and water-soluble compounds and their derivatives can have significant harmful effects on humans, aquatic life, and the environment. The adsorption method is the most efficient way of handling, but the high cost of biosorbents obstructs the feasibility of this approach. In this study, biomass waste derived from Palm-oil shells is synthesized as an eco-friendly biosorbent for phenol adsorption. A novel inverse modelling method based on differential evolution optimization (DEO) is used to estimate the isotherm and kinetic model parameters, which facilitates to identify the inherent mechanisms in the adsorption process for removing phenol from wastewater. The DEO based model parameters provides an accurate prediction that is very close to experimental data, thus resulting in higher regression coefficient, R2, and relatively low Pearson’s Chi-square, χ2& root mean square error (RMSE). Phenol adsorption found to be following Langmuir isotherm (R2 = 0.995; χ2 = 0.429; RMSE = 4.420) and Pseudo 2nd order kinetic model (R2 = 0.992; χ2 = 0.346; RMSE = 15.58). With a biosorbent size of 0.85 mm resulted in phenol removal efficiency of 98 %. For large scale industrial process, a design methodology is developed to estimate the amount of biosorbent (Palm-oil shell-based GAC) required to meet the desired phenol removal concentration.
J.N. Sahu; Rama Rao Karri; N.S. Jayakumar. Improvement in phenol adsorption capacity on eco-friendly biosorbent derived from waste Palm-oil shells using optimized parametric modelling of isotherms and kinetics by differential evolution. Industrial Crops and Products 2021, 164, 113333 .
AMA StyleJ.N. Sahu, Rama Rao Karri, N.S. Jayakumar. Improvement in phenol adsorption capacity on eco-friendly biosorbent derived from waste Palm-oil shells using optimized parametric modelling of isotherms and kinetics by differential evolution. Industrial Crops and Products. 2021; 164 ():113333.
Chicago/Turabian StyleJ.N. Sahu; Rama Rao Karri; N.S. Jayakumar. 2021. "Improvement in phenol adsorption capacity on eco-friendly biosorbent derived from waste Palm-oil shells using optimized parametric modelling of isotherms and kinetics by differential evolution." Industrial Crops and Products 164, no. : 113333.
In this study, fluoride removal from polluted potable water using magnetic carbon-based adsorbents derived from agricultural biomass was thoroughly investigated. An experimental matrix is designed considering the interactive effects of independent process variables (pH, adsorbent dose, contact time, and initial fluoride concentration) on the removal efficiency. Isotherms and kinetics studies, as well as anions interactions, were also investigated to understand the adsorption mechanisms further. The model parameters of isotherms and kinetics are estimated using nonlinear differential evolution optimization (DEO). Approaches like adaptive neuro-fuzzy inference system (ANFIS) and response surface methodology (RSM) are implemented to predict the fluoride removal and identify the optimal process values. The optimum removal efficiency of GAC-Fe3O4 (89.34%) was found to be higher than that of PAC-Fe3O4 (85.14%). Kinetics experiments indicated that they follow the intraparticle diffusion model, and adsorption isotherms indicated that they follow Langmuir and Freundlich models. Both PAC-Fe3O4 and GAC-Fe3O4 adsorbents have shown an adsorption capacity of 1.20 and 2.74 mg/g, respectively. The model predictions from ANFIS have a strong correlation with experimental results and superior to RSM predictions. The shape of the contours depicts the nonlinearity of the interactive effects and the mechanisms in the adsorption process.
Mohammad Hadi Dehghani; Solmaz Gholami; Rama Rao Karri; Eder C. Lima; Amir Hossein Mahvi; Shahrokh Nazmara; Mehdi Fazlzadeh. Process modeling, characterization, optimization, and mechanisms of fluoride adsorption using magnetic agro-based adsorbent. Journal of Environmental Management 2021, 286, 112173 .
AMA StyleMohammad Hadi Dehghani, Solmaz Gholami, Rama Rao Karri, Eder C. Lima, Amir Hossein Mahvi, Shahrokh Nazmara, Mehdi Fazlzadeh. Process modeling, characterization, optimization, and mechanisms of fluoride adsorption using magnetic agro-based adsorbent. Journal of Environmental Management. 2021; 286 ():112173.
Chicago/Turabian StyleMohammad Hadi Dehghani; Solmaz Gholami; Rama Rao Karri; Eder C. Lima; Amir Hossein Mahvi; Shahrokh Nazmara; Mehdi Fazlzadeh. 2021. "Process modeling, characterization, optimization, and mechanisms of fluoride adsorption using magnetic agro-based adsorbent." Journal of Environmental Management 286, no. : 112173.
Industrial effluents contain several organic and inorganic contaminants. Among others, dyes and heavy metals introduce a serious threat to drinking waterbodies. These pollutants can be noxious or carcinogenic in nature, and harmful to humans and different aquatic species. Therefore, it is of high importance to remove heavy metals and dyes to reduce their environmental toxicity. This has led to an extensive research for the development of novel materials and techniques for the removal of heavy metals and dyes. One route to the removal of these pollutants is the utilization of magnetic carbon nanotubes (CNT) as adsorbents. Magnetic carbon nanotubes hold remarkable properties such as surface-volume ratio, higher surface area, convenient separation methods, etc. The suitable characteristics of magnetic carbon nanotubes have led them to an extensive search for their utilization in water purification. Along with magnetic carbon nanotubes, the buckypaper (BP) membranes are also favorable due to their unique strength, high porosity, and adsorption capability. However, BP membranes are mostly used for salt removal from the aqueous phase and limited literature shows their applications for removal of heavy metals and dyes. This study focuses on the existence of heavy metal ions and dyes in the aquatic environment, and methods for their removal. Various fabrication approaches for the development of magnetic-CNTs and CNT-based BP membranes are also discussed. With the remarkable separation performance and ultra-high-water flux, magnetic-CNTs, and CNT-based BP membranes have a great potential to be the leading technologies for water treatment in future.
Fahad Saleem Ahmed Khan; Nabisab Mujawar Mubarak; Yie Hua Tan; Mohammad Khalid; Rama Rao Karri; Rashmi Walvekar; Ezzat Chan Abdullah; Sabzoi Nizamuddin; Shaukat Ali Mazari. A comprehensive review on magnetic carbon nanotubes and carbon nanotube-based buckypaper for removal of heavy metals and dyes. Journal of Hazardous Materials 2021, 413, 125375 .
AMA StyleFahad Saleem Ahmed Khan, Nabisab Mujawar Mubarak, Yie Hua Tan, Mohammad Khalid, Rama Rao Karri, Rashmi Walvekar, Ezzat Chan Abdullah, Sabzoi Nizamuddin, Shaukat Ali Mazari. A comprehensive review on magnetic carbon nanotubes and carbon nanotube-based buckypaper for removal of heavy metals and dyes. Journal of Hazardous Materials. 2021; 413 ():125375.
Chicago/Turabian StyleFahad Saleem Ahmed Khan; Nabisab Mujawar Mubarak; Yie Hua Tan; Mohammad Khalid; Rama Rao Karri; Rashmi Walvekar; Ezzat Chan Abdullah; Sabzoi Nizamuddin; Shaukat Ali Mazari. 2021. "A comprehensive review on magnetic carbon nanotubes and carbon nanotube-based buckypaper for removal of heavy metals and dyes." Journal of Hazardous Materials 413, no. : 125375.
Modified multi-walled carbon nanotubes (f-MWCNTs) and hydroxyapatite nanorods (n-HA) were reinforced into polypropylene (PP) with the support of a melt compounding approach. Varying composition of f-MWCNTs (0.1–0.3 wt.%) and nHA (15–20 wt.%) were reinforced into PP, to obtain biocomposites of different compositions. The morphology, thermal and mechanical characteristics of PP/n-HA/f-MWCNTs were observed. Tensile studies reflected that the addition of f-MWCNTs is advantageous in improving the tensile strength of PP/n-HA nanocomposites but decreases its Young’s modulus significantly. Based on the thermal study, the f-MWCNTs and n-HA were known to be adequate to enhance PP’s thermal and dimensional stability. Furthermore, MTT studies proved that PP/n-HA/f-MWCNTs are biocompatible. Consequently, f-MWCNTs and n-HA reinforced into PP may be a promising nanocomposite in orthopedics industry applications such as the human subchondral bone i.e. patella and cartilage and fabricating certain light-loaded implants.
Fahad Saleem Ahmed Khan; N. M. Mubarak; Mohammad Khalid; Rashmi Walvekar; E. C. Abdullah; Awais Ahmad; Rama Rao Karri; Harshini Pakalapati. Functionalized multi-walled carbon nanotubes and hydroxyapatite nanorods reinforced with polypropylene for biomedical application. Scientific Reports 2021, 11, 1 -10.
AMA StyleFahad Saleem Ahmed Khan, N. M. Mubarak, Mohammad Khalid, Rashmi Walvekar, E. C. Abdullah, Awais Ahmad, Rama Rao Karri, Harshini Pakalapati. Functionalized multi-walled carbon nanotubes and hydroxyapatite nanorods reinforced with polypropylene for biomedical application. Scientific Reports. 2021; 11 (1):1-10.
Chicago/Turabian StyleFahad Saleem Ahmed Khan; N. M. Mubarak; Mohammad Khalid; Rashmi Walvekar; E. C. Abdullah; Awais Ahmad; Rama Rao Karri; Harshini Pakalapati. 2021. "Functionalized multi-walled carbon nanotubes and hydroxyapatite nanorods reinforced with polypropylene for biomedical application." Scientific Reports 11, no. 1: 1-10.
Biodiesel, as a green fuel, acts as a potential candidate to supplement conventional fossil fuels. This research study targets green environment (using biodiesel) and clean environment (reduce wastewater) by producing biodiesel through oleaginous biomasses (Yarrowia lipolytica, Metschnikowia pulcherrima and Lipomyces starkeyi) grown on pulp and paper industrial wastewater. Batch culture studies were explored for the potential feedstock of the oleaginous organism by the synthesis of single cell oil and fatty acid methyl ester (FAME) yield. Response surface methodology (RSM) was used to design the optimal experimental matrix and identify the optimal process conditions that enhance the FAME yield. To determine the inherent characteristics of the growth of oleaginous biomasses on the industrial wastewater, a data-driven adaptive neuro-fuzzy inference system (ANFIS) is implemented. Y. lipolytica strain cultured shown high biomass concentration of 32.36 g/l with biomass productivity of 5.39 g/l/d was considered for further scale-up for the transesterification process. Results indicated that the maximum yield of 0.48 (g-biodiesel/g-lipid) was obtained under the 2.5 g of lipid dosage with 0.02g/ml of catalyst concentration by constant stirring at 70⁰C. The optimum conditions to achieve maximum FAME yield of 1.154 g/g was obtained at 2.485 g, 70.87 oC and 0.021 g/ml for lipid dosage, temperature and catalyst concentrations, respectively.
Madhu Vasaki E; Rama Rao Karri; Gobinath Ravindran; Balasubramanian Paramasivan. Predictive capability evaluation and optimization of sustainable biodiesel production from oleaginous biomass grown on pulp and paper industrial wastewater. Renewable Energy 2020, 168, 204 -215.
AMA StyleMadhu Vasaki E, Rama Rao Karri, Gobinath Ravindran, Balasubramanian Paramasivan. Predictive capability evaluation and optimization of sustainable biodiesel production from oleaginous biomass grown on pulp and paper industrial wastewater. Renewable Energy. 2020; 168 ():204-215.
Chicago/Turabian StyleMadhu Vasaki E; Rama Rao Karri; Gobinath Ravindran; Balasubramanian Paramasivan. 2020. "Predictive capability evaluation and optimization of sustainable biodiesel production from oleaginous biomass grown on pulp and paper industrial wastewater." Renewable Energy 168, no. : 204-215.
Manpreet Kaur; N. M. Mubarak; Bridgid Lai Fui Chin; Mohammad Khalid; Rama Rao Karri; Rashmi Walvekar; E.C. Abdullah; Faisal Amri Tanjung. Extraction of reinforced epoxy nanocomposite using agricultural waste biomass. IOP Conference Series: Materials Science and Engineering 2020, 943, 1 .
AMA StyleManpreet Kaur, N. M. Mubarak, Bridgid Lai Fui Chin, Mohammad Khalid, Rama Rao Karri, Rashmi Walvekar, E.C. Abdullah, Faisal Amri Tanjung. Extraction of reinforced epoxy nanocomposite using agricultural waste biomass. IOP Conference Series: Materials Science and Engineering. 2020; 943 ():1.
Chicago/Turabian StyleManpreet Kaur; N. M. Mubarak; Bridgid Lai Fui Chin; Mohammad Khalid; Rama Rao Karri; Rashmi Walvekar; E.C. Abdullah; Faisal Amri Tanjung. 2020. "Extraction of reinforced epoxy nanocomposite using agricultural waste biomass." IOP Conference Series: Materials Science and Engineering 943, no. : 1.
Substantial discharge of hazardous substances, especially dyes and heavy metal ions to the environment, has become a global concern due to many industries neglecting the environmental protocols in waste management. A massive discharge of contaminantsfrom different anthropogenic activities, can pose alarming threats to living species and adverse effect to the ecosystem stability. In the process of treating the polluted water, various methods and materials are used. Hybrid nanocomposites have attained numerous interest due to the combination of remarkable features of the organic and inorganic elements in a single material. In this regards, carbon and polymer based nanocomposites have gained particular interest because of their tremendous magnetic properties and stability. These nanocomposites can be fabricated using several approaches that include filling, template, hydrothermal, pulsed-laser irradiation, electro-spinning, detonation induced reaction, pyrolysis, ball milling, melt-blending, and many more. Moreover, carbon-based and polymer-based magnetic nanocomposites have been utilized for an extensive number of applications such as removal of heavy metal and dye adsorbents, magnetic resonance imaging, and drug delivery. This review emphasized mainly on the production of magnetic carbon and polymer nanocomposites employing various approaches and their applications in water and wastewater treatment. Furthermore, the future opportunities and challenges in applying magnetic nanocomposites for heavy metal ion and dye removal from water and wastewater treatment plant.
Fahad Saleem Ahmed Khan; Nabisab Mujawar Mubarak; Yie Hua Tan; Rama Rao Karri; Mohammad Khalid; Rashmi Walvekar; Ezzat Chan Abdullah; Shaukat Ali Mazari; Sabzoi Nizamuddin. Magnetic nanoparticles incorporation into different substrates for dyes and heavy metals removal—A Review. Environmental Science and Pollution Research 2020, 27, 43526 -43541.
AMA StyleFahad Saleem Ahmed Khan, Nabisab Mujawar Mubarak, Yie Hua Tan, Rama Rao Karri, Mohammad Khalid, Rashmi Walvekar, Ezzat Chan Abdullah, Shaukat Ali Mazari, Sabzoi Nizamuddin. Magnetic nanoparticles incorporation into different substrates for dyes and heavy metals removal—A Review. Environmental Science and Pollution Research. 2020; 27 (35):43526-43541.
Chicago/Turabian StyleFahad Saleem Ahmed Khan; Nabisab Mujawar Mubarak; Yie Hua Tan; Rama Rao Karri; Mohammad Khalid; Rashmi Walvekar; Ezzat Chan Abdullah; Shaukat Ali Mazari; Sabzoi Nizamuddin. 2020. "Magnetic nanoparticles incorporation into different substrates for dyes and heavy metals removal—A Review." Environmental Science and Pollution Research 27, no. 35: 43526-43541.
With the enormous increase in the demand for crude oil, and decrease in the resources of conventional oil reservoirs, there is a great need to understand heavy or foamy oil-gas drive mechanism to maximize the oil and gas production. To analyze the real movement of non-viscous heavy oil flow, the characteristic features of the oil-gas mixture has to be estimated to forecast the future potential supply from a heavy oil reservoir. An important question in heavy oil flow under solution gas drive is whether the behaviour of depletion tests can be simulated to model the heavy oil flow behaviour. The main objective of this research is to develop a reliable numerical model for modelling heavy oil flow calibrated with controlled solution gas drive experiments, and that makes a novelty in this manuscript. In this paper, CMG-STARS model which is capable of simulating solution gas drive tests that matched the research experiments. This heavy oil recovery model can determine the relative permeability curves for oil and gas in the dual-phase system using Corey's relations. At a depletion rate of 0.0418 psi/min, the maximum cumulative oil and gas production was observed to be 13,000 cm3 and 8500 cm3, respectively. The results from the bottom hole pressure and the block pressure simulation runs indicate that the fluid properties such as surface tension plays a significant role in the gas bubble formation. These results are promising, and helps to understand the complex behaviour of heavy oil reservoirs and thus can improve heavy oil recovery.
Bashir Busahmin; Rama Rao Karri; Stephen Tyson; Morteza Jami. Modeling of a long sand-pack for heavy crude oil through depletion tests utilizing methane gas. Petroleum 2020, 7, 188 -198.
AMA StyleBashir Busahmin, Rama Rao Karri, Stephen Tyson, Morteza Jami. Modeling of a long sand-pack for heavy crude oil through depletion tests utilizing methane gas. Petroleum. 2020; 7 (2):188-198.
Chicago/Turabian StyleBashir Busahmin; Rama Rao Karri; Stephen Tyson; Morteza Jami. 2020. "Modeling of a long sand-pack for heavy crude oil through depletion tests utilizing methane gas." Petroleum 7, no. 2: 188-198.
The feasibility and performance of Jicama peroxidase (JP) immobilized Buckypaper/polyvinyl alcohol (BP/PVA) membrane for methylene blue (MB) dye removal was investigated in a customized multi-stage filtration column under batch recycle mode. The effect of independent variables, such as influent flow rate, ratio of H2O2/MB dye concentration, and contact time on the dye removal efficiency, were investigated using response surface methodology (RSM). To capture the inherent characteristics and better predict the removal efficiency, a data-driven adaptive neuro-fuzzy inference system (ANFIS) is implemented. Results indicated that the optimum dye removal efficiency of 99.7% was achieved at a flow rate of 2 mL/min, 75:1 ratio of H2O2/dye concentration with contact time of 183 min. The model predictions of ANFIS are significantly good compared with RSM, thus resulting in R2 values of 0.9912 and 0.9775, respectively. The enzymatic kinetic parameters, Km and Vmax, were evaluated, which are 1.98 mg/L and 0.0219 mg/L/min, respectively. Results showed that JP-immobilized BP/PVA nanocomposite membrane can be promising and cost-effective biotechnology for the practical application in the treatment of industrial dye effluents.
Yien Jun Lau; Rama Rao Karri; Nabisab Mujawar Mubarak; Sie Yon Lau; Han Bing Chua; Mohammad Khalid; Priyanka Jagadish; Ezzat Chan Abdullah. Removal of dye using peroxidase-immobilized Buckypaper/polyvinyl alcohol membrane in a multi-stage filtration column via RSM and ANFIS. Environmental Science and Pollution Research 2020, 27, 1 -14.
AMA StyleYien Jun Lau, Rama Rao Karri, Nabisab Mujawar Mubarak, Sie Yon Lau, Han Bing Chua, Mohammad Khalid, Priyanka Jagadish, Ezzat Chan Abdullah. Removal of dye using peroxidase-immobilized Buckypaper/polyvinyl alcohol membrane in a multi-stage filtration column via RSM and ANFIS. Environmental Science and Pollution Research. 2020; 27 (32):1-14.
Chicago/Turabian StyleYien Jun Lau; Rama Rao Karri; Nabisab Mujawar Mubarak; Sie Yon Lau; Han Bing Chua; Mohammad Khalid; Priyanka Jagadish; Ezzat Chan Abdullah. 2020. "Removal of dye using peroxidase-immobilized Buckypaper/polyvinyl alcohol membrane in a multi-stage filtration column via RSM and ANFIS." Environmental Science and Pollution Research 27, no. 32: 1-14.
Fluoride is one of the chemicals that enter the human body through drinking water and, at higher concentrations, can cause various long-term health effects. Owing to remove the pollutant from aqueous solutions on large-scale, researchers are always exploring efficient, inexpensive, and easily recoverable adsorbents. In this research study, a versatile magnetic biomaterial & chelating agent (Chitosan) is used as an adsorbent for fluoride removal. In the present research, chitin was extracted from discarded shrimp shells. The obtained Chitosan was characterized based on its yielding, moisture and ash content, degree of acetylation and water binding capacity according to standard protocols. Also, in this study, differential evolution optimization is used to evaluate isotherm and kinetic model parameters using nonlinear model expressions, thus depicting inherent mechanisms. The isotherm and kinetic studies revealed that the adsorption process follows Langmuir and the pseudo 2nd order kinetic model. The interactive effect of process variables is investigated, and their optimal conditions for higher removal efficiency are estimated using response surface methodology. A quadratic model was used to predict removal efficiency at different operating conditions, which resulted in R2 of 0.9949. Optimum adsorption efficiency (93.1%) was observed at an adsorbent rate of 1 g/L, initial concentration of 1 mg/L, pH of 3, and contact time of 25 min. The thermodynamic study is indicating that the process is exothermic and spontaneous. The effect of interventions such as chloride, acidic, and sulfate on fluoride removal was also investigated, and results indicated that Chitosan-Fe3O4 is also efficient in their presence. A hybrid model of ANN and GA predicted the fluoride removal at different operating conditions, and results indicated that prediction values result in R2 of 0.9825. Thus, these results confirm the remarkable ability of Chitosan-Fe3O4 nanocomposite for fluoride removal.
Mohammad Hadi Dehghani; Rama Rao Karri; Eder Claudio Lima; Amir Hossein Mahvi; Shahrokh Nazmara; Abdol Mohammad Ghaedi; Mehdi Fazlzadeh; Solmaz Gholami. Regression and mathematical modeling of fluoride ion adsorption from contaminated water using a magnetic versatile biomaterial & chelating agent: Insight on production & experimental approaches, mechanism and effects of potential interferers. Journal of Molecular Liquids 2020, 315, 113653 .
AMA StyleMohammad Hadi Dehghani, Rama Rao Karri, Eder Claudio Lima, Amir Hossein Mahvi, Shahrokh Nazmara, Abdol Mohammad Ghaedi, Mehdi Fazlzadeh, Solmaz Gholami. Regression and mathematical modeling of fluoride ion adsorption from contaminated water using a magnetic versatile biomaterial & chelating agent: Insight on production & experimental approaches, mechanism and effects of potential interferers. Journal of Molecular Liquids. 2020; 315 ():113653.
Chicago/Turabian StyleMohammad Hadi Dehghani; Rama Rao Karri; Eder Claudio Lima; Amir Hossein Mahvi; Shahrokh Nazmara; Abdol Mohammad Ghaedi; Mehdi Fazlzadeh; Solmaz Gholami. 2020. "Regression and mathematical modeling of fluoride ion adsorption from contaminated water using a magnetic versatile biomaterial & chelating agent: Insight on production & experimental approaches, mechanism and effects of potential interferers." Journal of Molecular Liquids 315, no. : 113653.
Bisphenol A (BPA) in the aquatic environment have adverse effects on human health and other living organisms. BPA at low traces can lead to cardiovascular disease, type II diabetes, and impaired hepatic enzymes. For efficient BPA removal, chitosan immobilized nanoscale zero-valent iron (nZVI-chitosan) nanoparticles were synthesized and used as adsorbent. Since the BPA removal efficiency depends on independent process variables like nZVI-chitosan dosage, initial BPA concentration, pH and contact time, experiments were conducted systematically. To characterize the interaction effect of these variables, the experimental matrix is designed using response surface methodology (RSM). The isothermal and kinetic model parameters are estimated using differential evolution optimization (DEO), and these parameters better represent adsorption behaviour. The batch adsorption experiments indicated that the BPA adsorption on to nZVI-chitosan follows pseudo 1st order kinetic models. The maximum extent of BPA adsorption was 65.16 mg/g based on the Langmuir isotherm model. DEO based model parameters better fit the non-linear models with high R2 and lower RMSE. The regenerability experiments indicate that synthesized nZVI-chitosan adsorbent can be used up to three cycles with removal efficiency over 50%. The thermodynamic studies indicated that ΔG° is negative signifying a favourable and spontaneous adsorption process. The inhibition effects of coexisting ions on BPA adsorption followed the order of Mn2+ > Ca2+ > Mg2+ > Fe2+ for cations and of SO42− > NO3− > Cl− for anions. The BPA removal from real pharmaceutical wastewater is 93.8% obtained for optimal initial BPA concentration of 6 mg/L, an adsorbent dosage of 1.5 g/L, with solution pH of 3 and adsorption time of 1 h, whereas this removal efficiency is 95% for synthetic wastewater.
Mohammad Hadi Dehghani; Rama Rao Karri; Mahmood Alimohammadi; Shahrokh Nazmara; Ahmad Zarei; Zhyar Saeedi. Insights into endocrine-disrupting Bisphenol-A adsorption from pharmaceutical effluent by chitosan immobilized nanoscale zero-valent iron nanoparticles. Journal of Molecular Liquids 2020, 311, 113317 .
AMA StyleMohammad Hadi Dehghani, Rama Rao Karri, Mahmood Alimohammadi, Shahrokh Nazmara, Ahmad Zarei, Zhyar Saeedi. Insights into endocrine-disrupting Bisphenol-A adsorption from pharmaceutical effluent by chitosan immobilized nanoscale zero-valent iron nanoparticles. Journal of Molecular Liquids. 2020; 311 ():113317.
Chicago/Turabian StyleMohammad Hadi Dehghani; Rama Rao Karri; Mahmood Alimohammadi; Shahrokh Nazmara; Ahmad Zarei; Zhyar Saeedi. 2020. "Insights into endocrine-disrupting Bisphenol-A adsorption from pharmaceutical effluent by chitosan immobilized nanoscale zero-valent iron nanoparticles." Journal of Molecular Liquids 311, no. : 113317.