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In this study, the new lanthanum sulfide nanoparticle (La2S3) was synthesized and incorporated onto magnetic graphene oxide (MGO) sheets surface to produce potential adsorbent ([email protected]) for efficient removal of lead ions (Pb2+) from wastewater. The synthesized [email protected] adsorbent was characterized using Fourier transform infrared spectroscopy, field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy. The effective parameters on the adsorption process including solution pH (∼5), adsorbent dosage (20 mg), contact time (40 min), initial Pb2+ concentration and temperature were studied. The removal efficiency was obtained >95% for lead ions at pH 5 with 20 mg adsorbent. To validate the adsorption rate and mechanism, the kinetic and thermodynamic models were studied based on experimental data. The Langmuir isotherm model was best fitted to initial equilibrium concentration with a maximum adsorption capacity of 123.46 mg/g. This indicated a monolayer adsorption pattern for Pb2+ ions over [email protected] The pseudo-second-order as the kinetic model was best fitted to describe the adsorption rate due to high R2 > 0.999 as compared first-order. A thermodynamic model suggested a chemisorption and physisorption adsorption mechanism for Pb2+ ions uptake into [email protected] at different temperatures; ΔG° < −5.99 kJ mol−1 at 20 °C and ΔG° −18.2 kJ mol−1 at 45 °C. The obtained results showed that the novel nanocomposite ([email protected]) can be used as an alternative adsorbent in wastewater treatment.
Shahabaldin Rezania; Amin Mojiri; Junboum Park; Nicole Nawrot; Ewa Wojciechowska; Najat Marraiki; Nouf S.S. Zaghloul. Removal of lead ions from wastewater using lanthanum sulfide nanoparticle decorated over magnetic graphene oxide. Environmental Research 2021, 111959 .
AMA StyleShahabaldin Rezania, Amin Mojiri, Junboum Park, Nicole Nawrot, Ewa Wojciechowska, Najat Marraiki, Nouf S.S. Zaghloul. Removal of lead ions from wastewater using lanthanum sulfide nanoparticle decorated over magnetic graphene oxide. Environmental Research. 2021; ():111959.
Chicago/Turabian StyleShahabaldin Rezania; Amin Mojiri; Junboum Park; Nicole Nawrot; Ewa Wojciechowska; Najat Marraiki; Nouf S.S. Zaghloul. 2021. "Removal of lead ions from wastewater using lanthanum sulfide nanoparticle decorated over magnetic graphene oxide." Environmental Research , no. : 111959.
Anaerobic ammonia oxidation (anammox) is an environmentally friendly, cost-effective, and biological method for nitrogen treatment from aqueous solutions. However, slow growth rate, negative effects of high concentration of nitrite, ammonia and other pollutants (such as metals) on anammox activity are the main drawbacks of using anammox. Thus, in this study, anammox was attached on chitosan to improve anammox performance. Two reactors comprising chitosan and anammox bacteria (first reactor, chitosan/anammox) and solely anammox (second reactor, control) were run for 73 d. The nitrogen loading rate (NLR) varied from 2 to 14 (gN/L/d), while the nitrogen concentration varied from 80 to 700 mg/L. The chitosan/anammox reactor showed a better performance than the sole anammox (control), with respective maximum abatement values of ammonia (NH4+), nitrite (NO2-), and total nitrogen (TN) of 90.8%, 83.5%, and 81.7% on days 20–25 under a NLR of 8–10 kgTN/(m3 d). Response surface methodology (RSM) was employed to optimize the performance of both reactors, and a reasonable R2 value showed that the RSM well optimized the performance of the reactors. After finding the optimum performance conditions for both reactors, Fe and Cu (0.5–7.0 mg/L) were added to the influent to monitor the effects of metals on the performance of both reactors. The performance of both reactors decreased to 0% following the addition of 7.0 (first reactor) and 6.5 (second reactor) mg/L Cu and Fe, respectively. This indicated that chitosan not only enhanced nitrogen removal by anammox but also improved the resistance of anammox to metals.
Amin Mojiri; John L. Zhou; Harsha Ratnaweera; Akiyoshi Ohashi; Noriatsu Ozaki; Yoshiteru Aoi; Mohammadtaghi Vakili; Tomonori Kindaichi. Performance optimization of a chitosan/anammox reactor in nitrogen removal from synthetic wastewater. Journal of Environmental Chemical Engineering 2021, 9, 105252 .
AMA StyleAmin Mojiri, John L. Zhou, Harsha Ratnaweera, Akiyoshi Ohashi, Noriatsu Ozaki, Yoshiteru Aoi, Mohammadtaghi Vakili, Tomonori Kindaichi. Performance optimization of a chitosan/anammox reactor in nitrogen removal from synthetic wastewater. Journal of Environmental Chemical Engineering. 2021; 9 (3):105252.
Chicago/Turabian StyleAmin Mojiri; John L. Zhou; Harsha Ratnaweera; Akiyoshi Ohashi; Noriatsu Ozaki; Yoshiteru Aoi; Mohammadtaghi Vakili; Tomonori Kindaichi. 2021. "Performance optimization of a chitosan/anammox reactor in nitrogen removal from synthetic wastewater." Journal of Environmental Chemical Engineering 9, no. 3: 105252.
Antibiotics are frequently applied to treat bacterial infections in humans and animals. However, most consumed antibiotics are excreted into wastewater as metabolites or in their original form. Therefore, removal of antibiotics from aquatic environments is of high research interest. In this study, we investigated the removal of sulfamethoxazole (SMX) and ofloxacin (OFX) with Chaetoceros muelleri, a marine diatom. The optimization process was conducted using response surface methodology (RSM) with two independent parameters, i.e., the initial concentration of antibiotics and contact time. The optimum removal of SMX and OFX were 39.8% (0.19 mg L−1) and 42.5% (0.21 mg L−1) at the initial concentration (0.5 mg L−1) and contact time (6.3 days). Apart from that, the toxicity effect of antibiotics on the diatom was monitored in different SMX and OFX concentrations (0 to 50 mg L−1). The protein (mg L−1) and carotenoid (µg L−1) content increased when the antibiotic concentration increased up to 20 mg L−1, while cell viability was not significantly affected up to 20 mg L−1 of antibiotic concentration. Protein content, carotenoid, and cell viability decreased during high antibiotic concentrations (more than 20 to 30 mg L−1). This study revealed that the use of Chaetoceros muelleri is an appealing solution to remove certain antibiotics from wastewater.
Amin Mojiri; Maedeh Baharlooeian; Mohammad Zahed. The Potential of Chaetoceros muelleri in Bioremediation of Antibiotics: Performance and Optimization. International Journal of Environmental Research and Public Health 2021, 18, 977 .
AMA StyleAmin Mojiri, Maedeh Baharlooeian, Mohammad Zahed. The Potential of Chaetoceros muelleri in Bioremediation of Antibiotics: Performance and Optimization. International Journal of Environmental Research and Public Health. 2021; 18 (3):977.
Chicago/Turabian StyleAmin Mojiri; Maedeh Baharlooeian; Mohammad Zahed. 2021. "The Potential of Chaetoceros muelleri in Bioremediation of Antibiotics: Performance and Optimization." International Journal of Environmental Research and Public Health 18, no. 3: 977.
Using microalgae to remove pharmaceuticals and personal care products (PPCPs) micropollutants (MPs) have attracted considerable interest. However, high concentrations of persistent PPCPs can reduce the performance of microalgae in remediating PPCPs. Three persistent PPCPs, namely, carbamazepine (CBZ), sulfamethazine (SMT) and tramadol (TRA), were treated with a combination of Chaetoceros muelleri and biochar in a photobioreactor during this study. Two reactors were run. The first reactor comprised Chaetoceros muelleri, as the control, and the second reactor comprised Chaetoceros muelleri and biochar. The second reactor showed a better performance in removing PPCPs. Through the response surface methodology, 68.9% (0.330 mg L−1) of CBZ, 64.8% (0.311 mg L−1) of SMT and 69.3% (0.332 mg L−1) of TRA were removed at the initial concentrations of MPs (0.48 mg L−1) and contact time of 8.1 days. An artificial neural network was used in optimising elimination efficiency for each MP. The rational mean squared errors and high R2 values showed that the removal of PPCPs was optimised. Moreover, the effects of PPCPs concentration (0–100 mg L−1) on Chaetoceros muelleri were studied. Low PPCP concentrations (−1) increased the amounts of chlorophyll and proteins in the microalgae. However, cell viability, chlorophyll and protein contents dramatically decreased with increasing PPCPs concentrations (>40 mg L−1).
Amin Mojiri; Maedeh Baharlooeian; Reza Andasht Kazeroon; Hossein Farraji; Ziyang Lou. Removal of Pharmaceutical Micropollutants with Integrated Biochar and Marine Microalgae. Microorganisms 2020, 9, 4 .
AMA StyleAmin Mojiri, Maedeh Baharlooeian, Reza Andasht Kazeroon, Hossein Farraji, Ziyang Lou. Removal of Pharmaceutical Micropollutants with Integrated Biochar and Marine Microalgae. Microorganisms. 2020; 9 (1):4.
Chicago/Turabian StyleAmin Mojiri; Maedeh Baharlooeian; Reza Andasht Kazeroon; Hossein Farraji; Ziyang Lou. 2020. "Removal of Pharmaceutical Micropollutants with Integrated Biochar and Marine Microalgae." Microorganisms 9, no. 1: 4.
Landfill leachate is characterised by high chemical and biological oxygen demand and generally consists of undesirable substances such as organic and inorganic contaminants. Landfill leachate may differ depending on the content and age of landfill contents, the degradation procedure, climate and hydrological conditions. We aimed to explain the characteristics of landfill leachate and define the practicality of using different techniques for treating landfill leachate. Different treatments comprising biological methods (e.g. bioreactors, bioremediation and phytoremediation) and physicochemical approaches (e.g. advanced oxidation processes, adsorption, coagulation/flocculation and membrane filtration) were investigated in this study. Membrane bioreactors and integrated biological techniques, including integrated anaerobic ammonium oxidation and nitrification/denitrification processes, have demonstrated high performance in ammonia and nitrogen elimination, with a removal effectiveness of more than 90%. Moreover, improved elimination efficiency for suspended solids and turbidity has been achieved by coagulation/flocculation techniques. In addition, improved elimination of metals can be attained by combining different treatment techniques, with a removal effectiveness of 40–100%. Furthermore, combined treatment techniques for treating landfill leachate, owing to its high chemical oxygen demand and concentrations of ammonia and low biodegradability, have been reported with good performance. However, further study is necessary to enhance treatment methods to achieve maximum removal efficiency.
Amin Mojiri; John L. Zhou; Harsha Ratnaweera; Akiyoshi Ohashi; Noriatsu Ozaki; Tomonori Kindaichi; Hiroshi Asakura. Treatment of landfill leachate with different techniques: an overview. Journal of Water Reuse and Desalination 2020, 11, 66 -96.
AMA StyleAmin Mojiri, John L. Zhou, Harsha Ratnaweera, Akiyoshi Ohashi, Noriatsu Ozaki, Tomonori Kindaichi, Hiroshi Asakura. Treatment of landfill leachate with different techniques: an overview. Journal of Water Reuse and Desalination. 2020; 11 (1):66-96.
Chicago/Turabian StyleAmin Mojiri; John L. Zhou; Harsha Ratnaweera; Akiyoshi Ohashi; Noriatsu Ozaki; Tomonori Kindaichi; Hiroshi Asakura. 2020. "Treatment of landfill leachate with different techniques: an overview." Journal of Water Reuse and Desalination 11, no. 1: 66-96.
Occurrence of pharmaceutical micropollutants in aquatic environments has been one amongst serious environmental problems. During this study, two reactors, including a sequencing batch reactor (SBR) + powdered composite adsorbent (CA) (first reactor, SBR + CA) and a sequencing batch reactor (second reactor, SBR), were designed to treat synthetic wastewater. Powdered CA was added with a dosage of 4.8 g L−1 to the first reactor. Tap water was contaminated with chemical oxygen demand (COD), ammonia and three pharmaceuticals, namely, atenolol (ATN), ciprofloxacin (CIP) and diazepam (DIA) to produce synthetic wastewater. The SBR + CA illustrated a better performance during synthetic municipal wastewater treatment. Up to 138.6 mg L−1 (92.4%) of COD and up to 114.2 mg L−1 (95.2%) of ammonia were removed by the first reactor. Moreover, optimisation of pharmaceuticals removal was conducted through response surface methodology (RSM) and artificial neural network (ANN). Based on the RSM, the best elimination of ATN (90.2%, 2.26 mg L−1), CIP (94.0%, 2.35 mg L−1) and DIA (95.5%, 2.39 mg L−1) was detected at the optimum initial concentration of MPs (2.51 mg L−1) and the contact time (15.8 h). In addition, ANN represented a high R2 value (>0.99) and a rational mean squared error (<1.0) during the optimisation of micropollutants removal by both reactors. Moreover, adsorption isotherm study showed that the Freundlich isotherm could justify the abatement of micropollutants by using CA better than the Langmuir isotherm.
Amin Mojiri; John Zhou; Mohammadtaghi Vakili; Hiep Van Le. Removal performance and optimisation of pharmaceutical micropollutants from synthetic domestic wastewater by hybrid treatment. Journal of Contaminant Hydrology 2020, 235, 103736 .
AMA StyleAmin Mojiri, John Zhou, Mohammadtaghi Vakili, Hiep Van Le. Removal performance and optimisation of pharmaceutical micropollutants from synthetic domestic wastewater by hybrid treatment. Journal of Contaminant Hydrology. 2020; 235 ():103736.
Chicago/Turabian StyleAmin Mojiri; John Zhou; Mohammadtaghi Vakili; Hiep Van Le. 2020. "Removal performance and optimisation of pharmaceutical micropollutants from synthetic domestic wastewater by hybrid treatment." Journal of Contaminant Hydrology 235, no. : 103736.
In this study, hexadecylamine (HDA) impregnated chitosan-powder activated carbon (Ct-PAC) composite beads were successfully prepared and applied to adsorption of the anionic dye reactive black 5 (RB5) in aqueous solution. The Ct-PAC-HDA beads synthesized with 0.2 g powdered activated carbon (PAC) and 0.04 g HDA showed the highest dye removal efficiency. The prepared beads were characterized using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Various adsorption parameters, i.e., adsorbent dosage, pH, and contact time, which affect the adsorption performance, were studied in a series of batch experiments. The obtained adsorption data were found to be better represented by Freundlich (R2 = 0.994) and pseudo-second-order (R2 = 0.994) models. Moreover, it was ascertained that the adsorption of RB5 onto Ct-PAC-HDA beads is pH-dependent, and the maximum Langmuir adsorption capacity (666.97 mg/g) was observed at pH 4. It was also proved that Ct-PAC-HDA beads were regenerable for repeated use in the adsorption process.
Mohammadtaghi Vakili; Haider M. Zwain; Amin Mojiri; Wei Wang; Fatemeh Gholami; Zahra Gholami; Abdulmoseen S. Giwa; Baozhen Wang; Giovanni Cagnetta; Babak Salamatinia. Effective Adsorption of Reactive Black 5 onto Hybrid Hexadecylamine Impregnated Chitosan-Powdered Activated Carbon Beads. Water 2020, 12, 2242 .
AMA StyleMohammadtaghi Vakili, Haider M. Zwain, Amin Mojiri, Wei Wang, Fatemeh Gholami, Zahra Gholami, Abdulmoseen S. Giwa, Baozhen Wang, Giovanni Cagnetta, Babak Salamatinia. Effective Adsorption of Reactive Black 5 onto Hybrid Hexadecylamine Impregnated Chitosan-Powdered Activated Carbon Beads. Water. 2020; 12 (8):2242.
Chicago/Turabian StyleMohammadtaghi Vakili; Haider M. Zwain; Amin Mojiri; Wei Wang; Fatemeh Gholami; Zahra Gholami; Abdulmoseen S. Giwa; Baozhen Wang; Giovanni Cagnetta; Babak Salamatinia. 2020. "Effective Adsorption of Reactive Black 5 onto Hybrid Hexadecylamine Impregnated Chitosan-Powdered Activated Carbon Beads." Water 12, no. 8: 2242.
The adverse effects of glyphosate herbicide on plants are well recognised, however, potential hormetic effects have not been well studied. This study aimed to use tomato as a model organism to explore the potential hormetic effects of glyphosate in water (0–30 mg L−1) and in compost soil (0–30 mg kg−1). The growth-promoting effects of glyphosate at concentrations of 0.03–1 mg L−1 in water or 0.03–1 mg kg−1 in compost were demonstrated in tomato for the first time. These hormetic effects were manifest as increased hypocotyl and radicle growth of seedlings germinated on paper towel soaked in glyphosate solution and also in crops which had been sprayed with glyphosate. Increased rates of photosynthesis (up to 2-fold) were observed in 4-week old crops when seeds were sown in compost amended with glyphosate and also when leaves were sprayed with glyphosate. The examination of chloroplast morphology using transmission electron microscopy revealed that the hormetic effects were associated with elongation of chloroplasts, possibly due to lateral expansion of thylakoid grana.
Sajida Khan; John L. Zhou; Lei Ren; Amin Mojiri. Effects of glyphosate on germination, photosynthesis and chloroplast morphology in tomato. Chemosphere 2020, 258, 127350 .
AMA StyleSajida Khan, John L. Zhou, Lei Ren, Amin Mojiri. Effects of glyphosate on germination, photosynthesis and chloroplast morphology in tomato. Chemosphere. 2020; 258 ():127350.
Chicago/Turabian StyleSajida Khan; John L. Zhou; Lei Ren; Amin Mojiri. 2020. "Effects of glyphosate on germination, photosynthesis and chloroplast morphology in tomato." Chemosphere 258, no. : 127350.
Cadmium is a toxic heavy metal that may be detected in soils and plants. Wheat, as a food consumed by 60% of the world’s population, may uptake a high quantity of Cd through its roots and translocate Cd to the shoots and grains thus posing risks to human health. Therefore, we tried to explore the journey of Cd in wheat via a review of several papers. Cadmium may reach the root cells by some transporters (such as zinc-regulated transporter/iron-regulated transporter-like protein, low-affinity calcium transporters, and natural resistance-associated macrophages), and some cation channels or Cd chelates via yellow stripe 1-like proteins. In addition, some of the effective factors regarding Cd uptake into wheat, such as pH, organic matter, cation exchange capacity (CEC), Fe and Mn oxide content, and soil texture (clay content), were investigated in this paper. Increasing Fe and Mn oxide content and clay minerals may decrease the Cd uptake by plants, whereas reducing pH and CEC may increase it. In addition, the feasibility of methods to diminish Cd accumulation in wheat was studied. Amongst agronomic approaches for decreasing the uptake of Cd by wheat, using organic amendments is most effective. Using biochar might reduce the Cd accumulation in wheat grains by up to 97.8%.
Tayebeh Abedi; Amin Mojiri. Cadmium Uptake by Wheat (Triticum aestivum L.): An Overview. Plants 2020, 9, 500 .
AMA StyleTayebeh Abedi, Amin Mojiri. Cadmium Uptake by Wheat (Triticum aestivum L.): An Overview. Plants. 2020; 9 (4):500.
Chicago/Turabian StyleTayebeh Abedi; Amin Mojiri. 2020. "Cadmium Uptake by Wheat (Triticum aestivum L.): An Overview." Plants 9, no. 4: 500.
Although pesticides are widely used in agriculture, industry and households, they pose a risk to human health and ecosystems. Based on target organisms, the main types of pesticides are herbicides, insecticides and fungicides, of which herbicides accounted for 46% of the total pesticide usage worldwide. The movement of pesticides into water bodies occurs through run-off, spray drift, leaching, and sub-surface drainage, all of which have negative impacts on aquatic environments and humans. We sought to define the critical factors affecting the fluxes of contaminants into receiving waters. We also aimed to specify the feasibility of using sorbents to remove pesticides from waterways. In Karun River in Iran (1.21 × 105 ng/L), pesticide concentrations are above regulatory limits. The concentration of pesticides in fish can reach 26.1 × 103 μg/kg, specifically methoxychlor herbicide in Perca fluviatilis in Lithuania. During the last years, research has focused on elimination of organic pollutants, such as pesticides, from aqueous solution. Pesticide adsorption onto low-cost materials can effectively remediate contaminated waters. In particular, nanoparticle adsorbents and carbon-based adsorbents exhibit high performance (nearly 100%) in removing pesticides from water bodies.
Amin Mojiri; John L. Zhou; Brett Robinson; Akiyoshi Ohashi; Noriatsu Ozaki; Tomonori Kindaichi; Hossein Farraji; Mohammadtaghi Vakili. Pesticides in aquatic environments and their removal by adsorption methods. Chemosphere 2020, 253, 126646 .
AMA StyleAmin Mojiri, John L. Zhou, Brett Robinson, Akiyoshi Ohashi, Noriatsu Ozaki, Tomonori Kindaichi, Hossein Farraji, Mohammadtaghi Vakili. Pesticides in aquatic environments and their removal by adsorption methods. Chemosphere. 2020; 253 ():126646.
Chicago/Turabian StyleAmin Mojiri; John L. Zhou; Brett Robinson; Akiyoshi Ohashi; Noriatsu Ozaki; Tomonori Kindaichi; Hossein Farraji; Mohammadtaghi Vakili. 2020. "Pesticides in aquatic environments and their removal by adsorption methods." Chemosphere 253, no. : 126646.
Rice consumption is a source of arsenic (As) exposure, which poses serious health risks. In this study, the accumulation of As in rice was studied. Research shows that As accumulation in rice in Taiwan and Bangladesh is higher than that in other countries. In addition, the critical factors influencing the uptake of As into rice crops are defined. Furthermore, determining the feasibility of using effective ways to reduce the accumulation of As in rice was studied. AsV and AsIII are transported to the root through phosphate transporters and nodulin 26-like intrinsic channels. The silicic acid transporter may have a vital role in the entry of methylated As, dimethylarsinic acid (DMA) and monomethylarsonic acid (MMA), into the root. Amongst As species, DMA(V) is particularly mobile in plants and can easily transfer from root to shoot. The OsPTR7 gene has a key role in moving DMA in the xylem or phloem. Soil properties can affect the uptake of As by plants. An increase in organic matter and in the concentrations of sulphur, iron, and manganese reduces the uptake of As by plants. Amongst the agronomic strategies in diminishing the uptake and accumulation of As in rice, using microalgae and bacteria is the most efficient.
Tayebeh Abedi; Amin Mojiri. Arsenic Uptake and Accumulation Mechanisms in Rice Species. Plants 2020, 9, 129 .
AMA StyleTayebeh Abedi, Amin Mojiri. Arsenic Uptake and Accumulation Mechanisms in Rice Species. Plants. 2020; 9 (2):129.
Chicago/Turabian StyleTayebeh Abedi; Amin Mojiri. 2020. "Arsenic Uptake and Accumulation Mechanisms in Rice Species." Plants 9, no. 2: 129.
Tayebeh Abedi; Amin Mojiri. Constructed wetland modified by biochar/zeolite addition for enhanced wastewater treatment. Environmental Technology & Innovation 2019, 16, 1 .
AMA StyleTayebeh Abedi, Amin Mojiri. Constructed wetland modified by biochar/zeolite addition for enhanced wastewater treatment. Environmental Technology & Innovation. 2019; 16 ():1.
Chicago/Turabian StyleTayebeh Abedi; Amin Mojiri. 2019. "Constructed wetland modified by biochar/zeolite addition for enhanced wastewater treatment." Environmental Technology & Innovation 16, no. : 1.
A composite chitosan/nano-activated carbon (CS-NAC) aminated by (3-aminopropyl)triethoxysilane (APTES) was prepared in the form of beads and applied for the removal of acetaminophen from aqueous solutions. NAC and APTES concentrations were optimized to obtain a suitable adsorbent structure for enhanced removal of the pharmaceutical. The aminated adsorbent (CS-NAC-APTES beads) prepared with 40% w/w NAC and 2% v/v APTES showed higher adsorption capacity (407.83 mg/g) than CS-NAC beads (278.4 mg/g). Brunauer–Emmett–Teller (BET) analysis demonstrated that the surface area of the CS-NAC-APTES beads was larger than that of CS-NAC beads (1.16 times). The adsorption process was well fitted by the Freundlich model (R2 > 0.95), suggesting a multilayer adsorption. The kinetic study also substantiated that the pseudo-second-order model (R2 > 0.98) was in better agreement with the experimental data. Finally, it was proved that the prepared beads can be recycled (by washing with NaOH solution) at least 5 times before detectable performance loss.
Mohammadtaghi Vakili; Parisa Amouzgar; Giovanni Cagnetta; Baozhen Wang; Xiaogang Guo; Amin Mojiri; Ehsan Zeimaran; Babak Salamatinia; Wang; Guo. Ultrasound-Assisted Preparation of Chitosan/Nano-Activated Carbon Composite Beads Aminated with (3-Aminopropyl)Triethoxysilane for Adsorption of Acetaminophen from Aqueous Solutions. Polymers 2019, 11, 1701 .
AMA StyleMohammadtaghi Vakili, Parisa Amouzgar, Giovanni Cagnetta, Baozhen Wang, Xiaogang Guo, Amin Mojiri, Ehsan Zeimaran, Babak Salamatinia, Wang, Guo. Ultrasound-Assisted Preparation of Chitosan/Nano-Activated Carbon Composite Beads Aminated with (3-Aminopropyl)Triethoxysilane for Adsorption of Acetaminophen from Aqueous Solutions. Polymers. 2019; 11 (10):1701.
Chicago/Turabian StyleMohammadtaghi Vakili; Parisa Amouzgar; Giovanni Cagnetta; Baozhen Wang; Xiaogang Guo; Amin Mojiri; Ehsan Zeimaran; Babak Salamatinia; Wang; Guo. 2019. "Ultrasound-Assisted Preparation of Chitosan/Nano-Activated Carbon Composite Beads Aminated with (3-Aminopropyl)Triethoxysilane for Adsorption of Acetaminophen from Aqueous Solutions." Polymers 11, no. 10: 1701.
Recently, anammox bacteria have been applied for nitrogen elimination from wastewater. However, anammox is not effective for other kinds of pollutants. Therefore, in this study, the treatment of synthetic wastewater via combining anammox and biochar in a fixed-bed column was considered to improve performance. Two reactors, Reactor 1 (containing biochar and anammox bacteria) and Reactor 2 (containing biochar as a control), were run for four months. The nitrogen concentration (mg/L) and nitrogen loading rate (g-N/L/day) ranged from 100 to 500 and 5 to 20, respectively. Reactor 1 showed better performance in removing nitrogen from wastewater than Reactor 2. For Reactor 1, the optimum nitrogen removal effectiveness and nitrogen removal rate (g/L/day) were 82.3% and 8.2 (phase 1, 0–29 days), 90.9% and 12.7 (phase 2, 30–59 days), 72.3% and 13.0 (phase 3, 60–89 days), and 69.5% and 6.9 (phase 4, 90–119 days), respectively. An artificial neural network was applied for optimization. After finding the optimum performance conditions for the Reactor 1, COD (200 mg/L to 500 mg/L) was added to the influent. Adding up to 275 mg/L COD did not significantly affect N elimination, but after this point, N elimination was dramatically decreased.
Amin Mojiri; Akiyoshi Ohashi; Noriatsu Ozaki; Yoshiteru Aoi; Tomonori Kindaichi. Integrated anammox-biochar in synthetic wastewater treatment: Performance and optimization by artificial neural network. Journal of Cleaner Production 2019, 243, 118638 .
AMA StyleAmin Mojiri, Akiyoshi Ohashi, Noriatsu Ozaki, Yoshiteru Aoi, Tomonori Kindaichi. Integrated anammox-biochar in synthetic wastewater treatment: Performance and optimization by artificial neural network. Journal of Cleaner Production. 2019; 243 ():118638.
Chicago/Turabian StyleAmin Mojiri; Akiyoshi Ohashi; Noriatsu Ozaki; Yoshiteru Aoi; Tomonori Kindaichi. 2019. "Integrated anammox-biochar in synthetic wastewater treatment: Performance and optimization by artificial neural network." Journal of Cleaner Production 243, no. : 118638.
Among countless applications, chitosan has the potential to be an effective and cheap adsorbent for pollutant removal in (waste) water. In form of beads, it also exhibits good mechanical and fluid dynamic properties that are suitable for utilization in large-scale adsorption processes (e.g. as column packing). The present study investigates the beading process to prepare chitosan and cross-linked chitosan beads by phase inversion method. Beading parameters (i.e. chitosan amount, acid concentration, non-solvent agent concentration, and temperature) are optimized to obtain an appropriate adsorbent structure to uptake large organic molecules (reactive red 2, a dye, is utilized as model pollutant). Chitosan beads present remarkably enhanced adsorption capacity, mainly thanks to increased specific surface area and porosity. The addition of a cross-linker (diepoxyoctane) further improves pollutant removal. The adsorption process is well-fitted by the Freundlich model, suggesting a multilayer adsorption. The kinetic study also substantiates the complexity of the adsorption mechanism on bead surface, which, however, is satisfactorily predicted by a simple fractal kinetic model. Finally, it is proved that chitosan and cross-linked chitosan beads can be recycled (by washing with NaOH solution) at least 5 times before sensible performance loss.
Mohammadtaghi Vakili; Amin Mojiri; Haider Zwain; Jing Yuan; Abdulmoseen S. Giwa; Wei Wang; Fatemeh Gholami; Xiaogang Guo; Giovanni Cagnetta; Gang Yu. Effect of beading parameters on cross-linked chitosan adsorptive properties. Reactive and Functional Polymers 2019, 144, 104354 .
AMA StyleMohammadtaghi Vakili, Amin Mojiri, Haider Zwain, Jing Yuan, Abdulmoseen S. Giwa, Wei Wang, Fatemeh Gholami, Xiaogang Guo, Giovanni Cagnetta, Gang Yu. Effect of beading parameters on cross-linked chitosan adsorptive properties. Reactive and Functional Polymers. 2019; 144 ():104354.
Chicago/Turabian StyleMohammadtaghi Vakili; Amin Mojiri; Haider Zwain; Jing Yuan; Abdulmoseen S. Giwa; Wei Wang; Fatemeh Gholami; Xiaogang Guo; Giovanni Cagnetta; Gang Yu. 2019. "Effect of beading parameters on cross-linked chitosan adsorptive properties." Reactive and Functional Polymers 144, no. : 104354.
Organic micropollutants (MPs) in low concentrations can affect aquatic ecosystems and human health. Adsorption technique is one of the promising methods to remove MPs. Chitosan and zeolites are environmentally friendly and low-cost adsorbents. Thus, removal of organic MPs (such as bisphenol A (BPA), carbamazepine (CBZ), ketoprofen (KTF) and tonalide (TND) from aqueous solution via cross-linked chitosan/zeolite, as a fixed-bed column, was investigated in the current study. Hydraulic retention time was set at 0.8 h pH and concentration of organic MPs ranged from 4 to 8 and 0.50 mg/L to 2.0 mg/L, and they were considered as factors in optimizing the removal of pollutants via response surface methodology (RSM). Approximately 1.4560 mg/L (89.0%) of BPA, 1.4724 mg/L (90.0%) of CBZ, 1.4920 mg/L (91.2%) of KTF and 1.4118 mg/L (86.3%) of TND were removed at 5.1 pH and 1.636 mg/L initial concentration as the optimum removal efficiency on the basis of RSM. Artificial neural network (ANN) was used to optimise removal effectiveness for each MP. The high R2 values and reasonable mean squared errors indicated that ANN optimized MP removal in a logical aspect. Adsorption isotherm studies revealed that organic MP removal through chitosan/zeolite could be explained with Freundlich and Langmuir isotherms.
Mohammadtaghi Vakili; Amin Mojiri; Tomonori Kindaichi; Giovanni Cagnetta; Jing Yuan; Baozhen Wang; Abdulmoseen S. Giwa. Cross-linked chitosan/zeolite as a fixed-bed column for organic micropollutants removal from aqueous solution, optimization with RSM and artificial neural network. Journal of Environmental Management 2019, 250, 109434 .
AMA StyleMohammadtaghi Vakili, Amin Mojiri, Tomonori Kindaichi, Giovanni Cagnetta, Jing Yuan, Baozhen Wang, Abdulmoseen S. Giwa. Cross-linked chitosan/zeolite as a fixed-bed column for organic micropollutants removal from aqueous solution, optimization with RSM and artificial neural network. Journal of Environmental Management. 2019; 250 ():109434.
Chicago/Turabian StyleMohammadtaghi Vakili; Amin Mojiri; Tomonori Kindaichi; Giovanni Cagnetta; Jing Yuan; Baozhen Wang; Abdulmoseen S. Giwa. 2019. "Cross-linked chitosan/zeolite as a fixed-bed column for organic micropollutants removal from aqueous solution, optimization with RSM and artificial neural network." Journal of Environmental Management 250, no. : 109434.
Polycyclic aromatic hydrocarbons (PAHs) are principally derived from the incomplete combustion of fossil fuels. This study investigated the occurrence of PAHs in aquatic environments around the world, their effects on the environment and humans, and methods for their removal. Polycyclic aromatic hydrocarbons have a great negative impact on the humans and environment, and can even cause cancer in humans. Use of good methods and equipment are essential to monitoring PAHs, and GC/MS and HPLC are usually used for their analysis in aqueous solutions. In aquatic environments, the PAHs concentrations range widely from 0.03 ng/L (seawater; Southeastern Japan Sea, Japan) to 8,310,000 ng/L (Domestic Wastewater Treatment Plant, Siloam, South Africa). Moreover, bioaccumulation of ∑16PAHs in fish has been reported to range from 11.2 ng/L (Cynoscion guatucupa, South Africa) to 4207.5 ng/L (Saurida undosquamis, Egypt). Several biological, physical and chemical and biological techniques have been reported to treat water contaminated by PAHs, but adsorption and combined treatment methods have shown better removal performance, with some methods removing up to 99.99% of PAHs.
Amin Mojiri; John L. Zhou; Akiyoshi Ohashi; Noriatsu Ozaki; Tomonori Kindaichi. Comprehensive review of polycyclic aromatic hydrocarbons in water sources, their effects and treatments. Science of The Total Environment 2019, 696, 133971 .
AMA StyleAmin Mojiri, John L. Zhou, Akiyoshi Ohashi, Noriatsu Ozaki, Tomonori Kindaichi. Comprehensive review of polycyclic aromatic hydrocarbons in water sources, their effects and treatments. Science of The Total Environment. 2019; 696 ():133971.
Chicago/Turabian StyleAmin Mojiri; John L. Zhou; Akiyoshi Ohashi; Noriatsu Ozaki; Tomonori Kindaichi. 2019. "Comprehensive review of polycyclic aromatic hydrocarbons in water sources, their effects and treatments." Science of The Total Environment 696, no. : 133971.
The growing use of pharmaceuticals raises questions on their potential risk to human health and water quality. This research aimed to introduce a combined treatment technique with high performance in removing pharmaceutical micropollutants (MPs) from aqueous solution. The research included two steps, ozone treatment (first step) and adsorption technique (second step). The elimination of acetaminophen (ACT) and amoxicillin (AMX) with ozone reactor, first step, was optimised by artificial neural network (ANN). The optimisation process included two independent variables, namely, initial concentration of MPs and ozone dosage. On the basis of ANN, the linear regression coefficient denoted by R2 between predicted and experimental MP removals was close to 1. Result displayed that the prediction by the trained ANN is acceptable. Approximately 0.17 mg/L (84.8%) of ACT and 0.16 mg/L (82.7%) of AMX were removed at the initial concentration of 0.2 mg/L and ozone dosage of 15 mg/L. Beside it, ozonation experiments showed that the rate of constant (m−1s−1) for ACT and AMX were 2.63×106 and 5.98 ×106 respectively. After treating by ozone reactor, water was subjected to pass through the cross-linked chitosan/bentonite as a fixed-bed column, for second step. ACT and AMX were not detected after step 2.
Amin Mojiri; Mohammadtaghi Vakili; Hossein Farraji; Shuokr Qarani Aziz. Combined ozone oxidation process and adsorption methods for the removal of acetaminophen and amoxicillin from aqueous solution; kinetic and optimisation. Environmental Technology & Innovation 2019, 15, 100404 .
AMA StyleAmin Mojiri, Mohammadtaghi Vakili, Hossein Farraji, Shuokr Qarani Aziz. Combined ozone oxidation process and adsorption methods for the removal of acetaminophen and amoxicillin from aqueous solution; kinetic and optimisation. Environmental Technology & Innovation. 2019; 15 ():100404.
Chicago/Turabian StyleAmin Mojiri; Mohammadtaghi Vakili; Hossein Farraji; Shuokr Qarani Aziz. 2019. "Combined ozone oxidation process and adsorption methods for the removal of acetaminophen and amoxicillin from aqueous solution; kinetic and optimisation." Environmental Technology & Innovation 15, no. : 100404.
One of the most important types of emerging micropollutants is the pharmaceutical micropollutant. Pharmaceutical micropollutants are usually identified in several environmental compartments, so the removal of pharmaceutical micropollutants is a global concern. This study aimed to remove diclofenac (DCF), ibuprofen (IBP), and naproxen (NPX) from the aqueous solution via cross-linked magnetic chitosan/activated biochar (CMCAB). Two independent factors—pH (4–8) and a concentration of emerging micropollutants (0.5–3 mg/L)—were monitored in this study. Adsorbent dosage (g/L) and adsorption time (h) were fixed at 1.6 and 1.5, respectively, based on the results of preliminary experiments. At a pH of 6.0 and an initial micropollutant (MP) concentration of 2.5 mg/L, 2.41 mg/L (96.4%) of DCF, 2.47 mg/L (98.8%) of IBP, and 2.38 mg/L (95.2%) of NPX were removed. Optimization was done by an artificial neural network (ANN), which proved to be reasonable at optimizing emerging micropollutant elimination by CMCAB as indicated by the high R2 values and reasonable mean square errors (MSE). Adsorption isotherm studies indicated that both Langmuir and Freundlich isotherms were able to explain micropollutant adsorption by CMCAB. Finally, desorption tests proved that cross-linked magnetic chitosan/activated biochar might be employed for at least eight adsorption-desorption cycles.
Amin Mojiri; Reza Andasht Kazeroon; Ali Gholami. Cross-Linked Magnetic Chitosan/Activated Biochar for Removal of Emerging Micropollutants from Water: Optimization by the Artificial Neural Network. Water 2019, 11, 551 .
AMA StyleAmin Mojiri, Reza Andasht Kazeroon, Ali Gholami. Cross-Linked Magnetic Chitosan/Activated Biochar for Removal of Emerging Micropollutants from Water: Optimization by the Artificial Neural Network. Water. 2019; 11 (3):551.
Chicago/Turabian StyleAmin Mojiri; Reza Andasht Kazeroon; Ali Gholami. 2019. "Cross-Linked Magnetic Chitosan/Activated Biochar for Removal of Emerging Micropollutants from Water: Optimization by the Artificial Neural Network." Water 11, no. 3: 551.
Municipal solid waste has continued to be a major problem in many nations of the world. The primary methods of treating landfill leachate include physical-chemical and biological treatment processes. Pressure-driven membrane processes, such as microfiltration, ultrafiltration, nanofiltration, and reverse osmosis (RO), are among the utmost promising and capable ways for treating landfill leachate. The concentrated leachate created from pressure-driven membrane processes typically represents 13%–30% of total incoming landfill leachate. Concentrated leachate is a dark brown solution with high levels of pollutants. Treating concentrated leachate is extremely difficult, and thus, a combined treatment system is suggested. In the present study, concentrated landfill leachate was treated using a combined treatment technique that included electro-ozonation. The removal efficacies of chemical oxygen demand (COD), color, and nickel were monitored at original pH (7.3) as well as current and voltage of 4 A and 9 V, respectively.
Amin Mojiri; Lou Ziyang; Wang Hui; Ali Gholami. Concentrated Landfill Leachate Treatment by Electro-Ozonation. Advances in Environmental Engineering and Green Technologies 2019, 150 -170.
AMA StyleAmin Mojiri, Lou Ziyang, Wang Hui, Ali Gholami. Concentrated Landfill Leachate Treatment by Electro-Ozonation. Advances in Environmental Engineering and Green Technologies. 2019; ():150-170.
Chicago/Turabian StyleAmin Mojiri; Lou Ziyang; Wang Hui; Ali Gholami. 2019. "Concentrated Landfill Leachate Treatment by Electro-Ozonation." Advances in Environmental Engineering and Green Technologies , no. : 150-170.