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Vertical translocation/leaching of sulfamethoxazole (SMZ) through manure-amended sandy loam soil and significance of biochar application on SMZ retention were investigated in this study. Soil was filled in columns and amended with manure spiked with 13.75 mg kg−1 (S1), 27.5 mg kg−1 (S2), and 55 mg kg−1 (S3) of SMZ. Jujube (Ziziphus jujube L.) wood waste was transformed into biochar and mixed with S3 at 0.5% (S3-B1), 1.0% (S3-B2), and 2.0% (S3-B3) ratio. Cumulative SMZ leaching was lowest at pH 3.0, which increased by 16% and 34% at pH 5.0 and 7.0, respectively. A quicker release and translocation of SMZ from manure occurred during the initial 40 h, which gradually reduced over time. Intraparticle diffusion and Elovich kinetic models were the best fitted to leaching data. S3 exhibited the highest release and vertical translocation of SMZ, followed by S2, and S1; however, SMZ leaching was reduced by more than twofold in S3-B3. At pH 3.0, 2.0% biochar resulted in 99% reduction in SMZ leaching within 72 h, while 1.0% and 0.5% biochar applications reduced SMZ leaching to 99% within 120 and 144 h, respectively, in S3. The higher SMZ retention onto biochar could be due to electrostatic interactions, H-bonding, and π-π electron donor acceptor interactions.
Mohammad Al-Wabel; Munir Ahmad; Muhammad Rafique; Mutair Akanji; Adel Usman; Abdullah Al-Farraj. Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar. Molecules 2021, 26, 4674 .
AMA StyleMohammad Al-Wabel, Munir Ahmad, Muhammad Rafique, Mutair Akanji, Adel Usman, Abdullah Al-Farraj. Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar. Molecules. 2021; 26 (15):4674.
Chicago/Turabian StyleMohammad Al-Wabel; Munir Ahmad; Muhammad Rafique; Mutair Akanji; Adel Usman; Abdullah Al-Farraj. 2021. "Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar." Molecules 26, no. 15: 4674.
Biochar, an alkaline carbonaceous substance resulting from the thermal pyrolysis of biomass, reportedly enhances the micronutrient availability in acidic soils with little or no effect on alkaline soils. In this study, biochars were produced from poultry manure (PM) at 350 °C and 550 °C (BC350 and BC550 respectively). The acidified biochars (ABC350 and ABC550, respectively) were incorporated into an alkaline sandy soil, and their effects on the soil micronutrients (Cu, Fe, Mn and Zn) availability, and CO2–C efflux were investigated in a 30-day incubation study. The treatments (PM, BC350, BC550, ABC350, and ABC550) were administered in triplicate to 100 g soil at 0%, 1%, and 3% (w/w). Relative to the poultry manure treatment, acidification drastically reduced the pH of BC350 and BC550 by 3.13 and 4.28 units, respectively, and increased the micronutrient availability of the studied soil. Furthermore, the biochars (both non-acidified and acidified) reduced the CO2 emission compared to that of the poultry manure treatment. After 1% treatment with BC550 and ABC550, the CO2 emissions from the soil were 89.6% and 91.4% lower, respectively, than in the 1% poultry manure treatment. In summary, acidified biochar improved the micronutrient availability in alkaline soil, and when produced at higher temperature, can mitigate the CO2 emissions of soil carbon sequestration.
Mutair Akanji; Adel Usman; Mohammad Al-Wabel. Influence of Acidified Biochar on CO2–C Efflux and Micronutrient Availability in an Alkaline Sandy Soil. Sustainability 2021, 13, 5196 .
AMA StyleMutair Akanji, Adel Usman, Mohammad Al-Wabel. Influence of Acidified Biochar on CO2–C Efflux and Micronutrient Availability in an Alkaline Sandy Soil. Sustainability. 2021; 13 (9):5196.
Chicago/Turabian StyleMutair Akanji; Adel Usman; Mohammad Al-Wabel. 2021. "Influence of Acidified Biochar on CO2–C Efflux and Micronutrient Availability in an Alkaline Sandy Soil." Sustainability 13, no. 9: 5196.
The present work investigated the potential of using zeolite (clinoptilolite), montmorillonite (Swy2), and Conocarpus biochar as adsorbents to remove 226Ra from aqueous solution. The effect of the initial 226Ra concentrations on sorbents’ equilibrium activity concentrations and sorbents’ radium removal efficiency were investigated. The results showed that zeolite has a higher removal efficiency for 226Ra in comparison with the efficiencies of montmorillonite and biochar. In addition to the linear isotherm model, the Freundlich model, followed by Temkin’s model, provided a better description of the adsorption process than the Langmuir model. Kinetic studies indicated that a pseudo-second-order kinetic model could be the best fit for the adsorption of 226Ra onto the three investigated sorbents, which suggests that the mechanism of adsorption of 226Ra by sorbents was chemisorption. The intraparticle diffusion model indicated that adsorption of 226Ra onto the sorbents involves a multistep process: (i) boundary layer diffusion and (ii) intraparticle diffusion. Moreover, the remediation of groundwater samples polluted with 226Ra was assessed using the investigated sorbents; the results showed that zeolite also has the highest removal efficiency among other sorbents. Thus, the low cost, availability, and the high adsorption efficiency of zeolite can be a promising sorbent on 226Ra removal from aqueous solutions and groundwater remediation.
Fahad I. Almasoud; Abdullah S. Al-Farraj; Mohammad I. Al-Wabel; Adel R.A. Usman; Yousef J. Alanazi; Zaid Q. Ababneh. The Potential Use of Zeolite, Montmorillonite, and Biochar for the Removal of Radium-226 from Aqueous Solutions and Contaminated Groundwater. Processes 2020, 8, 1537 .
AMA StyleFahad I. Almasoud, Abdullah S. Al-Farraj, Mohammad I. Al-Wabel, Adel R.A. Usman, Yousef J. Alanazi, Zaid Q. Ababneh. The Potential Use of Zeolite, Montmorillonite, and Biochar for the Removal of Radium-226 from Aqueous Solutions and Contaminated Groundwater. Processes. 2020; 8 (12):1537.
Chicago/Turabian StyleFahad I. Almasoud; Abdullah S. Al-Farraj; Mohammad I. Al-Wabel; Adel R.A. Usman; Yousef J. Alanazi; Zaid Q. Ababneh. 2020. "The Potential Use of Zeolite, Montmorillonite, and Biochar for the Removal of Radium-226 from Aqueous Solutions and Contaminated Groundwater." Processes 8, no. 12: 1537.
Soil treatment methods to cope with ever-growing demands of construction industry and environmental aspects are always explored for their suitability in different in-situ conditions. Of late, enzyme induced calcite precipitation (EICP) is gaining importance as a reliable technique to improve soil properties and for contaminant remediation scenarios. In the present work, swelling and permeability characteristics of two native Indian cohesive soils (Black and Red) are explored. Experiments on the sorption and desorption of multiple heavy metals (Cd, Ni and Pb) onto these soils were conducted to understand the sorptive response of the heavy metals. To improve the heavy metal retention capacity and enhance swelling and permeability characteristics, the selected soils were treated with different enzyme solutions. The results revealed that EICP technique could immobilize the heavy metals in selected soils to a significant level and reduce the swelling and permeability. This technique is contaminant selective and performance varies with the nature and type of heavy metal used. Citric acid (C6H8O7) and ethylene diamine tetra-acetic acid (EDTA) were used as extractants in the present study to study the desorption response of heavy metals for different EICP conditions. The results indicate that calcium carbonate (CaCO3) precipitate deposited in the voids of soil has the innate potential in reducing the permeability of soil up to 47-fold and swelling pressure by 4-fold at the end of 21 days of curing period. Reduction in permeability and swell, following EICP treatment can be maintained with one time rinsing of the treated soil in water to avoid dissolution of precipitated CaCO3. Outcomes of this study have revealed that EICP technique can be adopted on selected native soils to reduce swelling and permeability characteristics followed by enhanced contaminant remediation enabling their potential as excellent landfill liner materials.
Arif Moghal; Mohammed Lateef; Syed Mohammed; Munir Ahmad; Adel Usman; Abdullah Almajed. Heavy Metal Immobilization Studies and Enhancement in Geotechnical Properties of Cohesive Soils by EICP Technique. Applied Sciences 2020, 10, 7568 .
AMA StyleArif Moghal, Mohammed Lateef, Syed Mohammed, Munir Ahmad, Adel Usman, Abdullah Almajed. Heavy Metal Immobilization Studies and Enhancement in Geotechnical Properties of Cohesive Soils by EICP Technique. Applied Sciences. 2020; 10 (21):7568.
Chicago/Turabian StyleArif Moghal; Mohammed Lateef; Syed Mohammed; Munir Ahmad; Adel Usman; Abdullah Almajed. 2020. "Heavy Metal Immobilization Studies and Enhancement in Geotechnical Properties of Cohesive Soils by EICP Technique." Applied Sciences 10, no. 21: 7568.
Molybdenum (Mo) in basic soils has high bioavailability and plant toxicity. This study aimed to investigate the effect of increasing Mo concentration on its availability and toxicity threshold in alfalfa plants grown in sandy loam calcareous soils, and the potential use of raw and acid- modified clay deposits as soil additives to immobilize Mo and reduce its phytoavailability. Raw clay deposits (RCD) were treated with H2SO4 to produce acid-modified clay deposits (AMCD). The first experiment was performed using soils treated with 0, 0.1, 1, 10, 50, and 100 mg Mo kg−1. The second experiment was conducted with soils treated with 10 or 50 mg Mo kg−1 and amended with RCD and AMCD at application rates of 0, 2.5, 5, and 10% (w/w). After harvesting, water-soluble Mo, ammonium bicarbonate-diethylenetriaminepentaacetic acid (AB-DTPA)-extractable Mo, and shoot Mo content as well as dry matter were measured. The results showed that water-soluble Mo, AB-DTPA-extractable Mo, and shoot Mo concentration increased at higher Mo soil addition. AMCD had a stronger influence on Mo immobilization and reduction effect on plant shoots compared to RCD, depending on soil Mo concentration and application rate. Applying AMCD decreased soil pH but increased salinity levels. The shoot dry matter significantly increased in soils amended with RCD and/or AMCD compared to control soils; with the highest improvement recorded for RCD at 10%. It was concluded that AMCD is an efficient immobilizing agent to reduce Mo mobility and its phytoavailability in calcareous soils. Additionally, both AMCD and especially RCD were able to create favorable conditions for plant growth.
Saleh Alrashidi; Abdelazeem Sallam; Adel Usman. Acid-Modified and Unmodified Natural Clay Deposits for in situ Immobilization and Reducing Phytoavailability of Molybdenum in a Sandy Loam Calcareous Soil. Sustainability 2020, 12, 8203 .
AMA StyleSaleh Alrashidi, Abdelazeem Sallam, Adel Usman. Acid-Modified and Unmodified Natural Clay Deposits for in situ Immobilization and Reducing Phytoavailability of Molybdenum in a Sandy Loam Calcareous Soil. Sustainability. 2020; 12 (19):8203.
Chicago/Turabian StyleSaleh Alrashidi; Abdelazeem Sallam; Adel Usman. 2020. "Acid-Modified and Unmodified Natural Clay Deposits for in situ Immobilization and Reducing Phytoavailability of Molybdenum in a Sandy Loam Calcareous Soil." Sustainability 12, no. 19: 8203.
In this study, a greenhouse pot experiment with maize (Zea mays L.) was conducted using treatments consisting of a control (CK), inorganic fertilizer of NPK (INF), and 1% and 3% (wt/wt) of olive mill solid waste (OMSW)-derived biochar (BC) at various pyrolytic temperatures (300–700 °C). The goal was to investigate potential negative versus positive effects of BC on pH, electrical conductivity (EC), and nutrient (P, K, Na, Ca, Mg, Fe, Mn, Zn, and Cu) availability in a calcareous loamy sandy soil. The results showed that application of OMSW-derived BC, especially with increasing pyrolysis temperature and/or application rate, significantly increased soil pH, EC, NH4OAc-extractable K, Na, Ca, and Mg, and ammonium bicarbonate-diethylenetriaminepentaacetic acid (AB-DTPA)-extractable Fe and Zn, while AB-DTPA-extractable Mn decreased. The application of 1% and 3% BC, respectively, increased the NH4OAc-extractable K by 2.5 and 5.2-fold for BC300, by 3.2 and 8.0-fold for BC500, and by 3.3 and 8.9-fold for BC700 compared with that of untreated soil. The results also showed significant increases in shoot content of K, Na, and Zn, while there were significant decreases in shoot content of P, Ca, Mg, and Mn. Furthermore, no significant effects were observed for growth of maize plants as a result of biochar BC addition. In conclusion, OMSW-derived BC can potentially have positive effects on the enhancement of soil K availability and its plant content but it reduced shoot nutrients, specifically P, Ca, Mg, and Mn; therefore, application of OMSW-derived BC to calcareous soil might be restricted.
Azzaz Alazzaz; Adel R. A. Usman; Munir Ahmad; Jamal Elfaki; Abdelazeem S. Sallam; Hesham Ibrahim; Mutair A. Akanji; Mohammad I. Al-Wabel. Potential short-term negative versus positive effects of olive mill-derived biochar on nutrient availability in a calcareous loamy sandy soil. 2020, 1 .
AMA StyleAzzaz Alazzaz, Adel R. A. Usman, Munir Ahmad, Jamal Elfaki, Abdelazeem S. Sallam, Hesham Ibrahim, Mutair A. Akanji, Mohammad I. Al-Wabel. Potential short-term negative versus positive effects of olive mill-derived biochar on nutrient availability in a calcareous loamy sandy soil. . 2020; ():1.
Chicago/Turabian StyleAzzaz Alazzaz; Adel R. A. Usman; Munir Ahmad; Jamal Elfaki; Abdelazeem S. Sallam; Hesham Ibrahim; Mutair A. Akanji; Mohammad I. Al-Wabel. 2020. "Potential short-term negative versus positive effects of olive mill-derived biochar on nutrient availability in a calcareous loamy sandy soil." , no. : 1.
Mesquite and fishbone were pyrolyzed to produce biochar (MBC and FBC, respectively) at different temperatures. The effects of the MBC and FBC on the removal of single and competitive metals (Cd, Pb, Zn, and Cu) from aqueous solutions were evaluated. A greenhouse pot experiment was also conducted using wheat plants with the mining-contaminated soils. In the presence of MBC or FBC (dosages of 15 and 30 g kg−1), the bioavailability of co-existing Cd, Pb, Zn, Cu, Mn, and Fe were assessed. The results clearly indicated competitive adsorption among metals with the highest adsorption preference toward Pb. The removal efficiency and partition coefficient (PC) values of heavy metals for FBCs were higher than those for MBCs. These two values increased with MBC pyrolysis temperature under both single- and multi-metals adsorption conditions. Applying FBC to mining soil resulted in the highest reduction in most NH4NO3-extractable heavy metals, reducing their availability to wheat plants. At the highest application dosage of 30 g kg−1, the highest metal immobilization, which accounted for 40.0% and 43.0% for Pb, 61.7% and 66.2% for Cu, 48.3% and 55.6% for Zn, and 32.7% and 33.8% for Cd, was achieved following the application of FBC400 and FBC600, respectively. However, applying MBC lead to a significant reduction in the availability of Cu and Pb but not that of Zn and Cd. FBC is thus more effective in removing heavy metal from aqueous solutions, as well as in immobilizing co-existing heavy metals in contaminated mining soil. It could, therefore, be an effective sorbent and immobilizing agent.
Yassir Abdin; Adel Usman; Yong Sik Ok; Yiu Fai Tsang; Mohammad Al-Wabel. Competitive sorption and availability of coexisting heavy metals in mining-contaminated soil: Contrasting effects of mesquite and fishbone biochars. Environmental Research 2019, 181, 108846 .
AMA StyleYassir Abdin, Adel Usman, Yong Sik Ok, Yiu Fai Tsang, Mohammad Al-Wabel. Competitive sorption and availability of coexisting heavy metals in mining-contaminated soil: Contrasting effects of mesquite and fishbone biochars. Environmental Research. 2019; 181 ():108846.
Chicago/Turabian StyleYassir Abdin; Adel Usman; Yong Sik Ok; Yiu Fai Tsang; Mohammad Al-Wabel. 2019. "Competitive sorption and availability of coexisting heavy metals in mining-contaminated soil: Contrasting effects of mesquite and fishbone biochars." Environmental Research 181, no. : 108846.
Natural clay sediments were collected from ten different localities in Saudi Arabia (S-1 from eastern, S-2 to S-4 from middle and S-5 to S-10 from western regions), characterized and evaluated for their efficiency towards chlortetracycline (CTC) removal from aqueous solutions. Sediment S-4 exhibited highest surface area (288.5 m2 g-1), followed by S-5, S-9, and S-1 (252.1, 249.6, and 110.4 m2 g-1, respectively). Sediments S-5, S-9, S-2, and S-4 showed the highest cation exchange capacities (CEC) (62.33, 56.54, 52.72, and 46.85 cmol kg-1, respectively). The pH range of 3.5–5.5 was optimum for the highest CTC removal. Freundlich model was best fitted to CTC sorption data (R2 = 0.96–0.99), followed by Dubinin-Radushkevich model (R2 = 0.89–0.97). The sediments S-4, S-5, and S-9 exhibited the highest CTC removal efficiency (98.80 – 99.05%), which could be due to higher smectite and kaolinite contents, CEC, surface area and layered structure. Post-sorption XRD patterns shown new peaks and peak shifts confirming the sorption of CTC. Electrostatic interactions, interlayer sorption and H–π bonding were the potential CTC sorption mechanisms. Therefore, natural clay sediments with high sorption capacities could efficiently remove CTC from contaminated aqueous media.
Mohammad I. Al-Wabel; Munir Ahmad; Adel Usman; Abdulazeem S. Sallam; Qaiser Hussain; Ridwan B. Binyameen; Muhammed R. Shehu; Yong Sik Ok. Evaluating the efficiency of different natural clay sediments for the removal of chlortetracycline from aqueous solutions. Journal of Hazardous Materials 2019, 384, 121500 .
AMA StyleMohammad I. Al-Wabel, Munir Ahmad, Adel Usman, Abdulazeem S. Sallam, Qaiser Hussain, Ridwan B. Binyameen, Muhammed R. Shehu, Yong Sik Ok. Evaluating the efficiency of different natural clay sediments for the removal of chlortetracycline from aqueous solutions. Journal of Hazardous Materials. 2019; 384 ():121500.
Chicago/Turabian StyleMohammad I. Al-Wabel; Munir Ahmad; Adel Usman; Abdulazeem S. Sallam; Qaiser Hussain; Ridwan B. Binyameen; Muhammed R. Shehu; Yong Sik Ok. 2019. "Evaluating the efficiency of different natural clay sediments for the removal of chlortetracycline from aqueous solutions." Journal of Hazardous Materials 384, no. : 121500.
Tannery waste–contaminated soil has a high amount of several toxic chemicals and heavy metals including chromium (Cr), which makes it unsuitable for agriculture practices. Majority of studies have reported the use of biochar (BC) as an amendment to restore contaminated soil. The efficiency of BC to immobilize Cr depends on its pretreatment and feedstock. This study aimed to investigate the potential of using BC for Cr immobilization and reducing its availability to maize plants in tannery waste–contaminated soil. The effect of BC on plant growth and heavy metal (Cr, Cu, Zn, Pb, Fe, and Mn) contents of maize shoots was also investigated. The soil was collected from landfill areas of Riyadh city (N 24° 25′, E 46° 34′). BCs were produced by pyrolyzing jujube (Ziziphus spina-christi) leaves (JL) and manure (M) waste at 300 and 700 °C. Collected soil and produced materials were characterized physically and chemically by following standard procedure. A greenhouse pot experiment was conducted with unamended tannery waste–contaminated soil and soil amended with the obtained BCs (JLBC-300, JLBC-700, MBC-300, and MBC-700) at an application rate of 50 g kg−1 and cultivated with maize (Zea mays L.). Before cultivation, soil-soluble Cr was measured in five leachate cycles. Dry matter and heavy metal (Cr, Cu, Zn, Pb, Fe, and Mn) contents of maize shoots were measured after harvesting. The results show that BCs produced at 700 °C showed the highest decrease in the concentrations of soil-soluble Cr and reduced its cumulative concentrations in soil leachates by about 93% and 59.0% for MBC-700 and JLBC-700 compared with the control soil, respectively. Overall, the highest decrease in cumulative soluble Cr was pronounced for MBC-700 followed by JLBC-700. For heavy metal contents in shoots, Cr concentrations were under detection limit in all treatments. However, BC amendments showed significant differences from the control for Cu, Mn, and Fe. From findings, it could be concluded that application of BCs pyrolyzed at 700 °C (especially for MBC-700) could be used as an amendment for reducing Cr mobility in tannery waste–contaminated soil and may create favorable conditions for crop production.
Muhammad Imran Rafique; Adel R. A. Usman; Munir Ahmad; Abdelazeem Sallam; Mohammad I. Al-Wabel. In situ immobilization of Cr and its availability to maize plants in tannery waste–contaminated soil: effects of biochar feedstock and pyrolysis temperature. Journal of Soils and Sediments 2019, 20, 330 -339.
AMA StyleMuhammad Imran Rafique, Adel R. A. Usman, Munir Ahmad, Abdelazeem Sallam, Mohammad I. Al-Wabel. In situ immobilization of Cr and its availability to maize plants in tannery waste–contaminated soil: effects of biochar feedstock and pyrolysis temperature. Journal of Soils and Sediments. 2019; 20 (1):330-339.
Chicago/Turabian StyleMuhammad Imran Rafique; Adel R. A. Usman; Munir Ahmad; Abdelazeem Sallam; Mohammad I. Al-Wabel. 2019. "In situ immobilization of Cr and its availability to maize plants in tannery waste–contaminated soil: effects of biochar feedstock and pyrolysis temperature." Journal of Soils and Sediments 20, no. 1: 330-339.
Carbon dioxide is the primary greenhouse gas that has a strong impact on global warming. Several technologies have been developed for capturing CO2 to mitigate the greenhouse effect. The objective of this research was to investigate the performance of several sorbents based on dry water and porous carbon materials for capturing CO2. Seven sorbents were prepared and comparatively evaluated for their CO2 capture capabilities: (i) Conocarpus biochar (CBC); (ii) commercial activated carbon (CAC); (iii) normal dry water (NDW); (iv) K2CO3-treated CBC (TCBC); (v) K2CO3-modified dry water (MDW); (vi) MDW and 2% TCBC (MDWTCBC); and (vii) MDW and 2% activated carbon (MDWCAC). The sorption process was carried out with initial CO2 concentration of 5.7%, temperature of 25 °C, feed gas flow rate of 0.5 l min-1 and a pressure of 1.0 bar. The pure CO2 was mixed with O2 or N2 to achieve the desired inlet concentration of CO2. The CO2 adsorption capacity and partition coefficient (PC) of the tested sorbents were evaluated at 5% and 100% breakthrough (BT). The results showed a longer breakthrough and equilibrium adsorption times for CO2 when mixed with N2 than with O2. Among all sorbents, both CAC and CBC showed enhanced CO2 capture performance with equilibrium (100% BT) adsorption capacities of 239 and 197 mg g-1, respectively (in terms of PC: 1.0 × 10-3 and 7.9 × 10-4 mol kg-1 Pa-1, respectively). In contrast, the performance of TCBC and the dry water-based sorbents was far lower than CAC or CBC. The CO2 adsorption data fitted well to the non-linearized form of the pseudo-first-order kinetic model. The Fourier-transform infrared spectral patterns indicated that the reaction of CO2 molecules with the hydroxyl groups of sorbents is possible through the formation of chemisorbed CO2 species. It could be concluded that the activation process did not play a role in increasing the CO2 capture performance in order to form new active sorption sites. However, Conocarpus biochar can be used as efficient sorbent for CO2 capture with a better performance than other materials tested previously (e.g., activated carbon).
Mohammad Al-Wabel; Jamal Elfaki; Adel Usman; Qaiser Hussain; Yong Sik Ok. Performance of dry water- and porous carbon-based sorbents for carbon dioxide capture. Environmental Research 2019, 174, 69 -79.
AMA StyleMohammad Al-Wabel, Jamal Elfaki, Adel Usman, Qaiser Hussain, Yong Sik Ok. Performance of dry water- and porous carbon-based sorbents for carbon dioxide capture. Environmental Research. 2019; 174 ():69-79.
Chicago/Turabian StyleMohammad Al-Wabel; Jamal Elfaki; Adel Usman; Qaiser Hussain; Yong Sik Ok. 2019. "Performance of dry water- and porous carbon-based sorbents for carbon dioxide capture." Environmental Research 174, no. : 69-79.
The prevalence of organic micropollutants (OMPs) in various environmental compartments is posing a serious health risks to all kinds of lives on the planet. The levels of OMPs such as polyaromatic hydrocarbons, antibiotics, pesticides, contraceptive medicines, and personal care products in water bodies are increasing with each passing day. It is an urgent need of time to limit the release of OMPs into the environment, and to remove the prevailing OMPs for sustainable environmental management. The majority of the conventional means of water decontamination are either inefficient or expensive. However, due to nanosize, high surface area, and hollow and layered structure, carbon nanotubes (CNTs) serve as excellent sorbents for the removal of a diverse range of OMPs. The occurrence of emerging OMPs and their detrimental effects on human and animal health are collected and discussed in this review. The characteristics and efficacy of various CNTs (pristine and modified) for the efficient removal of different OMPs, and the removal mechanisms have been reviewed and discussed. The literature demonstrated that adsorption of OMPs onto CNTs is very complicated and rely on multiple factors including the properties of adsorbent and the adsorbate as well as solution chemistry. It was found that H–bonding, electrostatic interactions, van der Waals forces, hydrophobic interactions, H-π bongs, and π-π interactions were the major mechanisms responsible for the adsorption of OMPs onto various kinds of CNTs. Despite of higher affinities for OMPs, hydrophobicity and higher costs restrain the practical application of CNTs for wastewater treatment on large scale. However, continuous production may lead to the development of cost-effective, efficient and eco-friendly CTNs technology for wastewater treatments in future.
Jahangir Ahmad; Shoaib Naeem; Munir Ahmad; Adel R.A. Usman; Mohammad I. Al-Wabel. A critical review on organic micropollutants contamination in wastewater and removal through carbon nanotubes. Journal of Environmental Management 2019, 246, 214 -228.
AMA StyleJahangir Ahmad, Shoaib Naeem, Munir Ahmad, Adel R.A. Usman, Mohammad I. Al-Wabel. A critical review on organic micropollutants contamination in wastewater and removal through carbon nanotubes. Journal of Environmental Management. 2019; 246 ():214-228.
Chicago/Turabian StyleJahangir Ahmad; Shoaib Naeem; Munir Ahmad; Adel R.A. Usman; Mohammad I. Al-Wabel. 2019. "A critical review on organic micropollutants contamination in wastewater and removal through carbon nanotubes." Journal of Environmental Management 246, no. : 214-228.
Date palm waste–derived biochar (DBC) was produced through pyrolysis (600 °C) and modified with zeolite (Z-DBC), silica (S-DBC), or nano-zerovalent iron (nZVI-DBC) to design efficient sorbents. The pristine and engineered biochars were characterized by SEM, XRD, BET, TGA, CHNS-O, and FTIR to investigate the surface, structural, and mineralogical composition. The nZVI-DBC exhibited lowest pH (6.15) and highest surface area (220.92 m2 g−1), carbon (80.55%), nitrogen (3.78%), and hydrogen (11.09%) contents compared with other biochars. Isotherm sorption data for chlortetracycline (CTC) removal from aqueous solutions was described well by Langmuir and Redlich–Peterson isotherms showing the highest fitness (R2 values in the range of 0.88–0.98 and 0.88–0.99, respectively). Langmuir predicted maximum CTC adsorption capacity was in order of nZVI-DBC (89.05 mg g−1) > S-DBC (45.57 mg g−1) > Z-DBC (30.42 mg g−1) > DBC (28.19 mg g−1). Kinetics adsorption data was best described by power function model (R2 = 0.93–0.99), followed by interaparticle diffusion (R2 = 0.85–0.96) model. The nZVI-DBC performed outclass by removing 98% of CTC, followed by S-DBC (68%), Z-DBC (35%), and DBC (36%). Chemisorption, H-bonding, and interaparticle diffusion were the operating mechanisms for CTC adsorption onto DBC, S-DBC, and Z-DBC, while π-π electron donor–accepter interactions and redox reactions augmented these mechanisms for highest CTC adsorption onto nZVI-DBC. Therefore, nZVI-DBC may serve as an efficient green technology for the removal of CTC from aqueous solutions and to reduce surface date palm waste pollution.
Munir Ahmad; Adel R. A. Usman; Muhammad Imran Rafique; Mohammad I. Al-Wabel. Engineered biochar composites with zeolite, silica, and nano-zerovalent iron for the efficient scavenging of chlortetracycline from aqueous solutions. Environmental Science and Pollution Research 2019, 26, 15136 -15152.
AMA StyleMunir Ahmad, Adel R. A. Usman, Muhammad Imran Rafique, Mohammad I. Al-Wabel. Engineered biochar composites with zeolite, silica, and nano-zerovalent iron for the efficient scavenging of chlortetracycline from aqueous solutions. Environmental Science and Pollution Research. 2019; 26 (15):15136-15152.
Chicago/Turabian StyleMunir Ahmad; Adel R. A. Usman; Muhammad Imran Rafique; Mohammad I. Al-Wabel. 2019. "Engineered biochar composites with zeolite, silica, and nano-zerovalent iron for the efficient scavenging of chlortetracycline from aqueous solutions." Environmental Science and Pollution Research 26, no. 15: 15136-15152.
Biochars (BCs) produced through biomass pyrolysis are highly efficient adsorbents for retaining dissolved cations in soil and water. However, their anionic sorption characteristics are unclear and depend on the feedstock used and the pyrolysis temperature. Herein, the adsorption of nitrate-nitrogen (NO3−-N) and bromate (BrO3−) anions onto date palm biochar was evaluated by considering the pyrolysis temperature in relation with the initial concentrations, initial pH, and adsorbent dose. Biochars from date palm rachis were produced at 300 °C (BC300) and 700 °C (BC700). The latter exhibited the highest adsorption efficiency of NO3−-N from aqueous solutions at an initial pH of 2, which was 25.8%–44.3% (at an adsorbent dose of 4 g L−1) and 47.0%–73.0% (at an adsorbent dose of 10 g L−1). In contrast, BC300 adsorbed BrO3− with an adsorption efficiency of 19.3%, 14.5%, 14.9%, and 13.6% at initial added concentrations of 5, 10, 15, and 20 μg L−1, respectively. However, BC700 showed zero adsorption for BrO3−. The results also showed that the non-linear models of Langmuir and/or Freundlich for NO3−-N and BrO3− adsorption described the adsorption data better in most cases. It could be concluded that high pyrolysis temperature BC are suitable for adsorbing NO3−-N, and low pyrolysis temperature BC may be used to adsorb BrO3−.
Abdulaziz S. Alsewaileh; Adel Usman; Mohammad I. Al-Wabel. Effects of pyrolysis temperature on nitrate-nitrogen (NO3−-N) and bromate (BrO3−) adsorption onto date palm biochar. Journal of Environmental Management 2019, 237, 289 -296.
AMA StyleAbdulaziz S. Alsewaileh, Adel Usman, Mohammad I. Al-Wabel. Effects of pyrolysis temperature on nitrate-nitrogen (NO3−-N) and bromate (BrO3−) adsorption onto date palm biochar. Journal of Environmental Management. 2019; 237 ():289-296.
Chicago/Turabian StyleAbdulaziz S. Alsewaileh; Adel Usman; Mohammad I. Al-Wabel. 2019. "Effects of pyrolysis temperature on nitrate-nitrogen (NO3−-N) and bromate (BrO3−) adsorption onto date palm biochar." Journal of Environmental Management 237, no. : 289-296.
Munir Ahmad; Mahtab Ahmad; Ahmed H. El-Naggar; Adel R.A. Usman; Adel Abduljabbar; Meththika Vithanage; Jamal Elfaki; Abdulelah Al-Faraj; Mohammad I. Al-Wabel. Aging Effects of Organic and Inorganic Fertilizers on Phosphorus Fractionation in a Calcareous Sandy Loam Soil. Pedosphere 2018, 28, 873 -883.
AMA StyleMunir Ahmad, Mahtab Ahmad, Ahmed H. El-Naggar, Adel R.A. Usman, Adel Abduljabbar, Meththika Vithanage, Jamal Elfaki, Abdulelah Al-Faraj, Mohammad I. Al-Wabel. Aging Effects of Organic and Inorganic Fertilizers on Phosphorus Fractionation in a Calcareous Sandy Loam Soil. Pedosphere. 2018; 28 (6):873-883.
Chicago/Turabian StyleMunir Ahmad; Mahtab Ahmad; Ahmed H. El-Naggar; Adel R.A. Usman; Adel Abduljabbar; Meththika Vithanage; Jamal Elfaki; Abdulelah Al-Faraj; Mohammad I. Al-Wabel. 2018. "Aging Effects of Organic and Inorganic Fertilizers on Phosphorus Fractionation in a Calcareous Sandy Loam Soil." Pedosphere 28, no. 6: 873-883.
Ragweed (Ambrosia artemisiifolia L.), a metal-accumulator invasive species, was pyrolyzed under a range of pyrolytic conditions to investigate their influence on immobilization and environmental safety of potentially toxic elements (PTEs) in the produced biochar. Conditions tested included temperature, retention time, heating rate, gas flow rate and particle size. Temperature and particle size had pronounced effects on product yields and physico-chemical characteristics of the produced biochar. All PTEs were enriched in the biochar, and the effect was more pronounced with higher temperature over 500 °C. However, fractionation of PTEs in biochar by following the sequential extraction process indicates that the mobile (bioavailable) fraction of most of the PTEs was transformed into more stabilized (residual) form (P < 0.01) after thermal conversion. Conclusively, biochar from metal-accumulating invasive ragweed with sustainable disposal and desired characteristics (with an optimal temperature range of a 500–600 °C and heating rate of 10 min−1 using smaller-size particle) can be produced by an appropriate combination of different pyrolytic condition with low environmental and ecological risk.
Balal Yousaf; Guijian Liu; Qumber Abbas; Muhammad Ubaid Ali; Ruwei Wang; Rafay Ahmed; Chengming Wang; Mohammad I. Al-Wabel; Adel R.A. Usman. Operational control on environmental safety of potentially toxic elements during thermal conversion of metal-accumulator invasive ragweed to biochar. Journal of Cleaner Production 2018, 195, 458 -469.
AMA StyleBalal Yousaf, Guijian Liu, Qumber Abbas, Muhammad Ubaid Ali, Ruwei Wang, Rafay Ahmed, Chengming Wang, Mohammad I. Al-Wabel, Adel R.A. Usman. Operational control on environmental safety of potentially toxic elements during thermal conversion of metal-accumulator invasive ragweed to biochar. Journal of Cleaner Production. 2018; 195 ():458-469.
Chicago/Turabian StyleBalal Yousaf; Guijian Liu; Qumber Abbas; Muhammad Ubaid Ali; Ruwei Wang; Rafay Ahmed; Chengming Wang; Mohammad I. Al-Wabel; Adel R.A. Usman. 2018. "Operational control on environmental safety of potentially toxic elements during thermal conversion of metal-accumulator invasive ragweed to biochar." Journal of Cleaner Production 195, no. : 458-469.
Presence of organic and inorganic acids influences the release rates of trace metals (TMs) bound in contaminated soil systems. This study aimed to investigate the influence of bioenergy waste biochar, derived from Gliricidia sepium (GBC), on the proton and ligand-induced bioavailability of Pb and Cu in a shooting range soil (17,066mg Pb and 1134mg Cu per kg soil) in the presence of inorganic (sulfuric, nitric, and hydrochloric) and organic acids (acetic, citric, and oxalic). Release rates of Pb and Cu in the shooting range soil were determined under different acid concentrations (0.05, 0.1, 0.5, 1, 5, and 10mM) and in the presence/absence of GBC (10% by weight of soil). The dissolution rates of Pb and Cu increased with increasing acid concentrations. Lead was preferentially released (2.79×10-13 to 8.86×10-13molm-2s-1) than Cu (1.07×10-13 to 1.02×10-13molm-2s-1) which could be due to the excessive Pb concentrations in soil. However, the addition of GBC to soil reduced Pb and Cu dissolution rates to a greater extent of 10.0 to 99.5% and 15.6 to 99.5%, respectively, under various acid concentrations. The increased pH in the medium and different adsorption mechanisms, including electrostatic attractions, surface diffusion, ion exchange, precipitation, and complexation could immobilize Pb and Cu released by the proton and ligands in GBC amended soil. Overall, GBC could be utilized as an effective soil amendment to immobilize Pb and Cu in shooting range soil even under the influence of soil acidity.
Prasanna Kumarathilaka; Mahtab Ahmad; Indika Herath; Kushani Mahatantila; B.C.L. Athapattu; Jörg Rinklebe; Yong Sik Ok; Adel Usman; Mohammad I. Al-Wabel; Adel Abduljabbar; Meththika Vithanage. Influence of bioenergy waste biochar on proton- and ligand-promoted release of Pb and Cu in a shooting range soil. Science of The Total Environment 2018, 625, 547 -554.
AMA StylePrasanna Kumarathilaka, Mahtab Ahmad, Indika Herath, Kushani Mahatantila, B.C.L. Athapattu, Jörg Rinklebe, Yong Sik Ok, Adel Usman, Mohammad I. Al-Wabel, Adel Abduljabbar, Meththika Vithanage. Influence of bioenergy waste biochar on proton- and ligand-promoted release of Pb and Cu in a shooting range soil. Science of The Total Environment. 2018; 625 ():547-554.
Chicago/Turabian StylePrasanna Kumarathilaka; Mahtab Ahmad; Indika Herath; Kushani Mahatantila; B.C.L. Athapattu; Jörg Rinklebe; Yong Sik Ok; Adel Usman; Mohammad I. Al-Wabel; Adel Abduljabbar; Meththika Vithanage. 2018. "Influence of bioenergy waste biochar on proton- and ligand-promoted release of Pb and Cu in a shooting range soil." Science of The Total Environment 625, no. : 547-554.
Biochar has vital importance as soil additives due to its characteristics, which are responsible for alleviating environmental problems and climate change. These additives should be evaluated to understand their physico-chemical properties and their ecotoxicological effects on plant growth. Therefore, this study aimed to (i) distinguish the properties of biochar produced from date palm and its derivative hydrochar, and (ii) investigate their ecotoxicological effects. Specifically, the biochar and hydrochar were produced from date palm leaflets by pyrolysis and hydrothermal carbonization, respectively. The produced chars were evaluated for their characteristics before and after water washing, and for their ecotoxicological effects on seed germination of lettuce (Lactuca sativa L). The results show that water washing lowered biochar’s pH and increased hydrochar’s pH. Moreover, water washing of hydrochar caused a significant reduction in the total content of essential elements such as Ca, Mg, Mn, and Zn. Lettuce germination was significantly inhibited to 20% by hydrochar, whereas biochar enhanced lettuce growth by increasing shoot length (by 51%) and dry biomass (by 114%). Hydrochar toxicity was correlated (R > 0.95 at p = 0.05) with high contents of total polyaromatic hydrocarbons (98.8 mg kg−1). Pre-treatment and assessment of hydrochar should be taken into account prior to application as a soil amendment.
Mohammad I. Al-Wabel; Muhammad Imran Rafique; Mahtab Ahmad; Munir Ahmad; Abid Hussain; Adel R.A. Usman. Pyrolytic and hydrothermal carbonization of date palm leaflets: Characteristics and ecotoxicological effects on seed germination of lettuce. Saudi Journal of Biological Sciences 2018, 26, 665 -672.
AMA StyleMohammad I. Al-Wabel, Muhammad Imran Rafique, Mahtab Ahmad, Munir Ahmad, Abid Hussain, Adel R.A. Usman. Pyrolytic and hydrothermal carbonization of date palm leaflets: Characteristics and ecotoxicological effects on seed germination of lettuce. Saudi Journal of Biological Sciences. 2018; 26 (4):665-672.
Chicago/Turabian StyleMohammad I. Al-Wabel; Muhammad Imran Rafique; Mahtab Ahmad; Munir Ahmad; Abid Hussain; Adel R.A. Usman. 2018. "Pyrolytic and hydrothermal carbonization of date palm leaflets: Characteristics and ecotoxicological effects on seed germination of lettuce." Saudi Journal of Biological Sciences 26, no. 4: 665-672.
Biochar (BC) was produced by pyrolyzing the date palm leaf waste at 600 °C and then loaded with phosphorus (P) via sorption process. Greenhouse pot experiment was conducted to investigate the application effects of BC and P-loaded biochar (BCP) on growth and availability of P and heavy metals to maize (Zea mays L.) plants grown in contaminated mining soil. The treatments consisted of BC and BCP (at application rates of 5, 10, 20, and 30 g kg-1 of soil), recommended NK and NPK, and a control (no amendment). Sorption experiment showed that Langmuir predicted maximum P sorption capacity of BC was 13.71 mg g-1. Applying BCP increased the soil available P, while BC and BCP significantly decreased the soil labile heavy metals compared to control. Likewise, heavy metals in exchangeable and reducible fractions were transformed to more stable fraction with BC and BCP applications. The highest application rate of BCP (3%) was most effective treatment in enhancing plant growth parameters (shoot and root lengths and dry matter) and uptake of P and heavy metals by 2-3 folds. However, based on metal uptake and phytoextraction indices, total heavy metals extraction by maize plants was very small for practical application. It could be concluded that using P-loaded biochar as a soil additive may be considered a promising tool to immobilize heavy metals in contaminated mining areas, while positive effects on the biomass growth of plants may assist the stabilization of contaminated areas affected by wind and water erosion.
Munir Ahmad; Adel R.A. Usman; Abdullah S. Al-Faraj; Mahtab Ahmad; Abdelazeem Sallam; Mohammad I. Al-Wabel. Phosphorus-loaded biochar changes soil heavy metals availability and uptake potential of maize (Zea mays L.) plants. Chemosphere 2018, 194, 327 -339.
AMA StyleMunir Ahmad, Adel R.A. Usman, Abdullah S. Al-Faraj, Mahtab Ahmad, Abdelazeem Sallam, Mohammad I. Al-Wabel. Phosphorus-loaded biochar changes soil heavy metals availability and uptake potential of maize (Zea mays L.) plants. Chemosphere. 2018; 194 ():327-339.
Chicago/Turabian StyleMunir Ahmad; Adel R.A. Usman; Abdullah S. Al-Faraj; Mahtab Ahmad; Abdelazeem Sallam; Mohammad I. Al-Wabel. 2018. "Phosphorus-loaded biochar changes soil heavy metals availability and uptake potential of maize (Zea mays L.) plants." Chemosphere 194, no. : 327-339.
Woody biochars derived by pyrolyzing Gliricidia sepium at 300°C and 500°C and a waste byproduct of same biomass from a bioenergy industry (BC700) were tested for their effect on soil enzymes activities and available form of heavy metals in multi-metals contaminated soil. Pot experiments were conducted during 6 weeks with tomato (Lycopersicon esculentum L.) at biochar application rates, 1, 2.5, and 5% (w/w). A reduction in polyphenol oxidase with biochars produced at increasing pyrolysis temperature compared to the control whereas the maximum activity of dehydrogenase and catalase was observed in 1% BC500 and 2.5% BC300, respectively. Soil available form of Ni, Mn, and Cr were reduced by 55, 70% and 80% in 5% BC700 amended soil, respectively. The highest geometric mean of enzyme activities was observed in 2.5% BC300 treatment. Overall the application of high dosages of high temperature derived biochar masks/deteriorates soil enzyme activities but immobilizes bioavailable heavy metals and reduces toxicity.
Meththika Vithanage; Tharanga Bandara; Mohammad I. Al-Wabel; Adel Abduljabbar; Adel R. A. Usman; Mahtab Ahmad; Yong Sik Ok. Soil Enzyme Activities in Waste Biochar Amended Multi-Metal Contaminated Soil; Effect of Different Pyrolysis Temperatures and Application Rates. Communications in Soil Science and Plant Analysis 2018, 49, 635 -643.
AMA StyleMeththika Vithanage, Tharanga Bandara, Mohammad I. Al-Wabel, Adel Abduljabbar, Adel R. A. Usman, Mahtab Ahmad, Yong Sik Ok. Soil Enzyme Activities in Waste Biochar Amended Multi-Metal Contaminated Soil; Effect of Different Pyrolysis Temperatures and Application Rates. Communications in Soil Science and Plant Analysis. 2018; 49 (5):635-643.
Chicago/Turabian StyleMeththika Vithanage; Tharanga Bandara; Mohammad I. Al-Wabel; Adel Abduljabbar; Adel R. A. Usman; Mahtab Ahmad; Yong Sik Ok. 2018. "Soil Enzyme Activities in Waste Biochar Amended Multi-Metal Contaminated Soil; Effect of Different Pyrolysis Temperatures and Application Rates." Communications in Soil Science and Plant Analysis 49, no. 5: 635-643.
Abdul-Aziz Al-Enazy; Fahad Al-Barakah; Saud Al-Oud; Adel Usman. Effect of phosphogypsum application and bacteria co-inoculation on biochemical properties and nutrient availability to maize plants in a saline soil. Archives of Agronomy and Soil Science 2018, 64, 1394 -1406.
AMA StyleAbdul-Aziz Al-Enazy, Fahad Al-Barakah, Saud Al-Oud, Adel Usman. Effect of phosphogypsum application and bacteria co-inoculation on biochemical properties and nutrient availability to maize plants in a saline soil. Archives of Agronomy and Soil Science. 2018; 64 (10):1394-1406.
Chicago/Turabian StyleAbdul-Aziz Al-Enazy; Fahad Al-Barakah; Saud Al-Oud; Adel Usman. 2018. "Effect of phosphogypsum application and bacteria co-inoculation on biochemical properties and nutrient availability to maize plants in a saline soil." Archives of Agronomy and Soil Science 64, no. 10: 1394-1406.