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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.
The development of a simple method to synthesize highly efficient and stable magnetic microsphere beads for sulfathiazole (STZ) removal from contaminated aqueous media was demonstrated in this study. Conocarpus (Conocarpus erectus L.) tree waste (CW) derived biochar (BC) was modified to fabricate chitosan-BC (CBC) and magnetic CBC (CBC-Fe) microsphere beads. Proximate, chemical, and structural properties of the produced adsorbents were investigated. Kinetics, equilibrium, and pH adsorption batch trials were conducted to evaluate the effectiveness of the synthesized adsorbents for STZ removal. All adsorbents exhibited the highest STZ adsorption at pH 5.0. STZ adsorption kinetics data was best emulated using pseudo-second order and Elovich models. The equilibrium adsorption data was best emulated using Langmuir, Freundlich, Redlich–Peterson, and Temkin models. CBC-Fe demonstrated the highest Elovich, pseudo-second order, and power function rate constants, as well as the highest apparent diffusion rate constant. Additionally, Langmuir isotherm predicted maximum adsorption capacity was the highest for CBC-Fe (98.67 mg g−1), followed by CBC (56.54 mg g−1) and BC (48.63 mg g−1). CBC-Fe and CBC removed 74.5%–108.8% and 16.2%–25.6% more STZ, respectively, than that of pristine BC. π-π electron-donor–acceptor interactions and Lewis acid-base reactions were the main mechanisms for STZ removal; however, intraparticle diffusion and H-bonding further contributed in the adsorption process. The higher efficiency of CBC-Fe for STZ adsorption could be due to its magnetic properties as well as stronger and conducting microsphere beads, which degraded the STZ molecules through generation of HO• radicals.
Mohammad I. Al-Wabel; Munir Ahmad; Adel R.A. Usman; Abdullah S.F. Al-Farraj. Designing chitosan based magnetic beads with conocarpus waste-derived biochar for efficient sulfathiazole removal from contaminated water. Saudi Journal of Biological Sciences 2021, 1 .
AMA StyleMohammad I. Al-Wabel, Munir Ahmad, Adel R.A. Usman, Abdullah S.F. Al-Farraj. Designing chitosan based magnetic beads with conocarpus waste-derived biochar for efficient sulfathiazole removal from contaminated water. Saudi Journal of Biological Sciences. 2021; ():1.
Chicago/Turabian StyleMohammad I. Al-Wabel; Munir Ahmad; Adel R.A. Usman; Abdullah S.F. Al-Farraj. 2021. "Designing chitosan based magnetic beads with conocarpus waste-derived biochar for efficient sulfathiazole removal from contaminated water." Saudi Journal of Biological Sciences , no. : 1.
This study was conducted to investigate the potential of Jujube (Ziziphus jujube L) wood waste-derived biochar (BC) and its derivative polymer-modified biochar (PBC) in removing hexavalent chromium (CrVI) from aqueous solutions and in achieving Cr stabilization in tannery waste-contaminated soil. BC was produced at three different pyrolysis temperature (300oC, 500oC, 700oC) and was polymerized with acrylamide and N, N1 methylenebisacrylamide. The results showed that CrVI adsorption is a function of the pH and CrVI initial concentration of the solution. The PBC showed highest sorption efficiency for CrVI removal, which amounted to 76.4%–99.6% of the CrVI overall initial concentrations (5–40 mg L−1) at an initial pH of 2. In greenhouse, wheat (Triticum aestivum L) was cultivated as a test crop in pots with tannery waste-contaminated soil along with BCs and PBCs amendments. The BC and PBC amended soil showed 47.7% and 65% less Cr uptake by the plant roots in comparison with unamended soil, respectively. In addition, zero concentration of Cr in the plant shoots was noted with the PBC-amended soil, while the Cr concentration in the shoots was decreased by 89% with the BC-amended soil. Thus, it was concluded that BC and PBC have great potential in removing CrVI from aqueous phases and in decreasing the Cr mobility and bioavailability in soil.
Muhammad Imran Rafique; Adel R.A. Usman; Munir Ahmad; Mohammad I. Al-Wabel. Immobilization and mitigation of chromium toxicity in aqueous solutions and tannery waste-contaminated soil using biochar and polymer-modified biochar. Chemosphere 2020, 266, 129198 .
AMA StyleMuhammad Imran Rafique, Adel R.A. Usman, Munir Ahmad, Mohammad I. Al-Wabel. Immobilization and mitigation of chromium toxicity in aqueous solutions and tannery waste-contaminated soil using biochar and polymer-modified biochar. Chemosphere. 2020; 266 ():129198.
Chicago/Turabian StyleMuhammad Imran Rafique; Adel R.A. Usman; Munir Ahmad; Mohammad I. Al-Wabel. 2020. "Immobilization and mitigation of chromium toxicity in aqueous solutions and tannery waste-contaminated soil using biochar and polymer-modified biochar." Chemosphere 266, no. : 129198.
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.
Fabrication of efficient and low-cost adsorbents through enzyme induced carbonate precipitation (EICP) of sand embedded with binding agents for sulfathiazole (STZ) removal is reported for the first time. Sand enriched with biochar (300 °C, 500 °C, and 700 °C), xanthan gum, guar gum, bentonite, or sodium alginate (1% w/w ratios) was cemented via EICP technique. Enrichment with binding agents decreased the unconfined compressive strength, improved the porosity, and induced functional groups. Biochar enrichment reduced the pH, and increased the calcite contents and electrical conductivity. Fixed-bed column adsorption trials revealed that biochars enrichment resulted in the highest STZ removal (64.7–87.9%) from water at initial STZ concentration of 50 mg L−1, than the adsorbents enriched with other binding agents. Yoon–Nelson and Thomas kinetic models were fitted well to the adsorption data (R2 = 0.91–0.98). The adsorbents embedded with 700 °C biochar (BC7) exhibited the highest Yoon–Nelson rate constants (0.087 L min−1), 50% breakthrough time (58.056 min), and Thomas model-predicted maximum adsorption capacity (4.925 mg g−1). Overall, BC7 removed 168% higher STZ from water than pristine cemented sand. Post-adsorption XRD and FTIR analyses suggested the binding of STZ onto the adsorbents. π–π electron-donor-acceptor interactions, aided-by electrostatic interactions and H-bonding were the main STZ adsorption mechanisms.
Abdullah Almajed; Munir Ahmad; Adel R.A. Usman; Mohammad I. Al-Wabel. Fabrication of sand-based novel adsorbents embedded with biochar or binding agents via calcite precipitation for sulfathiazole scavenging. Journal of Hazardous Materials 2020, 405, 124249 .
AMA StyleAbdullah Almajed, Munir Ahmad, Adel R.A. Usman, Mohammad I. Al-Wabel. Fabrication of sand-based novel adsorbents embedded with biochar or binding agents via calcite precipitation for sulfathiazole scavenging. Journal of Hazardous Materials. 2020; 405 ():124249.
Chicago/Turabian StyleAbdullah Almajed; Munir Ahmad; Adel R.A. Usman; Mohammad I. Al-Wabel. 2020. "Fabrication of sand-based novel adsorbents embedded with biochar or binding agents via calcite precipitation for sulfathiazole scavenging." Journal of Hazardous Materials 405, no. : 124249.
Novel carbon nanodots (nCD-DBC) and nano zero-valent iron composites (nZVI-DBC) were synthesized using date palm waste-derived biochar (DBC). The synthesized materials were analyzed for chemical and structural composition by using FTIR, SEM, XRD, and TGA, and evaluated for their methylthioninium chloride dye (MB) removal efficiency from contaminated aqueous solutions. pH 7.0 was found optimum for the highest MB removal in sorption batch studies. Kinetics sorption of MB onto the sorbents was best described by pseudo-second-order (R2 = 0.93–0.99) and Elovich models (R2 = 0.86–0.97) implying that sorption was being controlled by chemisorption. Langmuir model predicted maximum sorption capacities for nCD-DBC, nZVI-DBC, and DBC were 1558.66, 1182.90, and 851.67 mg g−1, respectively, which correlated with the results of kinetics sorption. Likewise, nCD-DBC yielded the highest partition coefficient (7067 mL g−1), followed by nZVI-DBC (1460 mL g−1), and DBC (930 mL g−1). Post-sorption XRD, FTIR, and SEM analyses depicted the binding of MB onto the sorbents. It was suggested that electrostatic interactions, π–π electron donor-accepter interactions, degradation, and diffusion were responsible for MB removal by the synthesized materials. Therefore, the nCD-DBC, nZVI-DBC, and DBC can potentially be used for scavenging MB dye from contaminated aqueous solutions.
Munir Ahmad; Mutair A. Akanji; Adel R. A. Usman; Abdullah S. F. Al-Farraj; Yiu Fai Tsang; Mohammad I. Al-Wabel. Turning date palm waste into carbon nanodots and nano zerovalent iron composites for excellent removal of methylthioninium chloride from water. Scientific Reports 2020, 10, 1 -15.
AMA StyleMunir Ahmad, Mutair A. Akanji, Adel R. A. Usman, Abdullah S. F. Al-Farraj, Yiu Fai Tsang, Mohammad I. Al-Wabel. Turning date palm waste into carbon nanodots and nano zerovalent iron composites for excellent removal of methylthioninium chloride from water. Scientific Reports. 2020; 10 (1):1-15.
Chicago/Turabian StyleMunir Ahmad; Mutair A. Akanji; Adel R. A. Usman; Abdullah S. F. Al-Farraj; Yiu Fai Tsang; Mohammad I. Al-Wabel. 2020. "Turning date palm waste into carbon nanodots and nano zerovalent iron composites for excellent removal of methylthioninium chloride from water." Scientific Reports 10, no. 1: 1-15.
Waste date palm-derived biochar (DPBC) was modified with nano-zerovalent iron (BC-ZVI) and silica (BC-SiO2) through mechanochemical treatments and evaluated for arsenate (As(V)) removal from water. The feedstock and synthesized adsorbents were characterized through proximate, ultimate, and chemical analyses for structural, surface, and mineralogical compositions. BC-ZVI demonstrated the highest surface area and contents of C, N, and H. A pH range of 2–6 was optimum for BC-ZVI (100% removal), 3–6 for DPBC (89% removal), and 4–6 for BC-SiO2 (18% removal). Co-occurring PO43− and SO42− ions showed up to 100% reduction, while NO3− and Cl− ions resulted in up to 26% reduction in As(V) removal. Fitness of the Langmuir, Freundlich and Redlich-Peterson isotherms to As(V) adsorption data suggested that both mono- and multi-layer adsorption processes occurred. BC-ZVI showed superior performance by demonstrating the highest Langmuir maximum adsorption capacity (26.52 mg g−1), followed by DPBC, BC-SiO2, and commercial activated carbon (AC) (7.33, 5.22, and 3.28 mg g−1, respectively). Blockage of pores with silica particles in BC-SiO2 resulted in lower As(V) removal than that of DPBC. Pseudo-second-order kinetic model fitted well with the As(V) adsorption data (R2 = 0.99), while the Elovich, intraparticle diffusion, and power function models showed a moderate fitness (R2 = 0.53–0.93). The dynamics of As(V) adsorption onto the tested adsorbents exhibited the highest adsorption rates for BC-ZVI. As(V) adsorption onto the tested adsorbents was confirmed through post-adsorption FTIR, SEM-EDS, and XRD analyses. Adsorption of As(V) onto DPBC, BC-SiO2, and AC followed electrostatic interactions, surface complexation, and intraparticle diffusion, whereas, these mechanisms were further abetted by the higher surface area, nano-sized structure, and redox reactions of BC-ZVI.
Munir Ahmad; Adel R.A. Usman; Qaiser Hussain; Abdullah S.F. Al-Farraj; Yiu Fai Tsang; Jochen Bundschuh; Mohammad I. Al-Wabel. Fabrication and evaluation of silica embedded and zerovalent iron composited biochars for arsenate removal from water. Environmental Pollution 2020, 266, 115256 .
AMA StyleMunir Ahmad, Adel R.A. Usman, Qaiser Hussain, Abdullah S.F. Al-Farraj, Yiu Fai Tsang, Jochen Bundschuh, Mohammad I. Al-Wabel. Fabrication and evaluation of silica embedded and zerovalent iron composited biochars for arsenate removal from water. Environmental Pollution. 2020; 266 ():115256.
Chicago/Turabian StyleMunir Ahmad; Adel R.A. Usman; Qaiser Hussain; Abdullah S.F. Al-Farraj; Yiu Fai Tsang; Jochen Bundschuh; Mohammad I. Al-Wabel. 2020. "Fabrication and evaluation of silica embedded and zerovalent iron composited biochars for arsenate removal from water." Environmental Pollution 266, no. : 115256.
In the present work, the olive mill solid waste (OMSW)-derived biochar (BC) was produced at various pyrolytic temperatures (300–700°C) and characterized to investigate its potential negative versus positive application effects on pH, electrical conductivity (EC), and nutrients (P, K, Na, Ca, Mg, Fe, Mn, Zn, and Cu) availability in a calcareous loamy sand soil. Therefore, 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% (w/w) of OMSW-derived BCs. The results showed that BC yield, volatile matter, functional groups, and zeta potential decreased with pyrolytic temperature, whereas BC pH, EC, and its contents of ash and fixed carbon increased with pyrolytic temperature. The changes in the BC properties with increasing pyrolytic temperatures reflected on soil pH, EC and the performance of soil nutrients availability. The BC application, especially with increasing pyrolytic 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 increase in shoot content of K, Na, and Zn, while there was significant decrease in shoot content of P, Ca, Mg, and Mn. Furthermore, no significant effects were observed for maize growth as a result of 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, especially for 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; Hesham Ibrahim; Jamal Elfaki; Abdelazeem S. Sallam; 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 sand soil. PLOS ONE 2020, 15, e0232811 .
AMA StyleAzzaz Alazzaz, Adel R. A. Usman, Munir Ahmad, Hesham Ibrahim, Jamal Elfaki, Abdelazeem S. Sallam, 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 sand soil. PLOS ONE. 2020; 15 (7):e0232811.
Chicago/Turabian StyleAzzaz Alazzaz; Adel R. A. Usman; Munir Ahmad; Hesham Ibrahim; Jamal Elfaki; Abdelazeem S. Sallam; 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 sand soil." PLOS ONE 15, no. 7: e0232811.
Biochar, due to its heterogeneity, may not be equally effective for cationic and anionic metals/metalloid immobilization in soil. Biochar modification could facilitate the immobilization of specific metals/metalloids in soil. This study explored the potential of unmodified and modified (with KMnO4) biochars derived from sawdust and rice husk at two different temperatures (300 and 700 °C) on the mobility of arsenic (As) in contaminated soil. Soil column leaching experiments were performed with two application rates (2% and 5%; w/w) of different biochars, and the pore waters at different time intervals were analyzed for As and other cations and anion concentrations. In general, all the biochars increased As mobility in soil. The biochars produced at 300 °C significantly and highly increased As concentrations (up to 341%) in pore waters, as compared with the unamended soil. However, the modified biochars showed As immobilization in soil as compared with their unmodified counterparts. The mechanisms of biochar interaction with As in soil were investigated by developing correlations of As with various chemical constituents. It was inferred that As mobilization was increased due to competition between As and PO43−. Contrarily, immobilization of As in soil by modified biochars was related to sorption onto Fe- and Mn-oxides. Pristine biochar may not be an efficient remediation measure for As-contaminated soil. There could be a risk of As leaching into groundwater from soils amended with biochar. However, it is recommended that modification of biochar may assist the immobilization of As in soil.
Memuna Amin; Mahtab Ahmad; Abida Farooqi; Qaiser Hussain; Munir Ahmad; Mohammad I. Al-Wabel; Hamna Saleem. Arsenic release in contaminated soil amended with unmodified and modified biochars derived from sawdust and rice husk. Journal of Soils and Sediments 2020, 20, 3358 -3367.
AMA StyleMemuna Amin, Mahtab Ahmad, Abida Farooqi, Qaiser Hussain, Munir Ahmad, Mohammad I. Al-Wabel, Hamna Saleem. Arsenic release in contaminated soil amended with unmodified and modified biochars derived from sawdust and rice husk. Journal of Soils and Sediments. 2020; 20 (9):3358-3367.
Chicago/Turabian StyleMemuna Amin; Mahtab Ahmad; Abida Farooqi; Qaiser Hussain; Munir Ahmad; Mohammad I. Al-Wabel; Hamna Saleem. 2020. "Arsenic release in contaminated soil amended with unmodified and modified biochars derived from sawdust and rice husk." Journal of Soils and Sediments 20, no. 9: 3358-3367.
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.
2,4-Dichlorophenol (2,4-DCP) is a hazardous chlorinated organic chemical derived from phenol that exerts serious effects on living organisms. In the present study, SnO2 templated with grapefruit peel carbon as a nanocomposite ([email protected]) was designed via ball-milling, and its mechanism of 2,4-DCP adsorption in aqueous solution was determined. Batch adsorption experiments revealed that the maximum adsorption efficiency of [email protected] occurred at 6.0 pH, 3 mg L−1 initial adsorbate concentration, 2 h contact time, and 293 K temperature. The [email protected] nanocomposite and its non-tin-bearing counterpart, grapefruit derived char (@GPC), showed maximum adsorption capacities (QL) of 45.95 and 22.09 mg g−1 and partition coefficients of 41.77 and 10.83 mg g−1 μM−1, respectively. The adsorption of 2,4-DCP was best described by the Redlich−Peterson model followed by the Langmuir model with high correlation coefficients (R2 ≥ 0.96), and the adsorption kinetic data best fitted the pseudo-second-order model (R2 ≥ 0.98). The thermodynamic parameters indicated that the reaction was spontaneous, exothermic, and involved high affinity between [email protected] and 2,4-DCP. The high desorption efficiency obtained (>80%) demonstrated the recyclability of the adsorbent. The enhanced QL of [email protected] was due to the effective combination of GPC and SnO2. A thin porous layer of GPC on SnO2 nanoparticles provided effective channels, a large surface area, and an abundance of active sites for 2,4-DCP adsorption. Thus, the [email protected] nanocomposite could potentially be used as a low-cost adsorbent to remove 2,4-DCP from water.
Saima Batool; Muhammad Idrees; Munir Ahmad; Mahtab Ahmad; Qaiser Hussain; Atef Iqbal; Jie Kong. Design and characterization of a biomass template/SnO2 nanocomposite for enhanced adsorption of 2,4-dichlorophenol. Environmental Research 2019, 181, 108955 .
AMA StyleSaima Batool, Muhammad Idrees, Munir Ahmad, Mahtab Ahmad, Qaiser Hussain, Atef Iqbal, Jie Kong. Design and characterization of a biomass template/SnO2 nanocomposite for enhanced adsorption of 2,4-dichlorophenol. Environmental Research. 2019; 181 ():108955.
Chicago/Turabian StyleSaima Batool; Muhammad Idrees; Munir Ahmad; Mahtab Ahmad; Qaiser Hussain; Atef Iqbal; Jie Kong. 2019. "Design and characterization of a biomass template/SnO2 nanocomposite for enhanced adsorption of 2,4-dichlorophenol." Environmental Research 181, no. : 108955.
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.
Biochar is a carbon-rich organic amendment often used to sequester carbon and sustain soil productivity. The characteristics and the potential benefits of biochars depend upon their feedstock type. Therefore, changes in stability and composition of biochars derived from different agricultural wastes viz. sugarcane filter cake (SF), farmyard manure (FM), and rice husk (RH) were investigated in this study. The feedstocks were pyrolyzed at 350 °C, and the resultant biochars (SF-BC, FM-BC, and RH-BC) were characterized for yield, proximate (moisture, volatile matter, fixed carbon, ash content) and ultimate (CEC & elemental composition) analyses, surface area (BET), surface morphology (SEM), structural and functional groups (FTIR), and thermal stability (TG-DTA). Results revealed that SF-BC exhibited the highest yield (42.18%), lower bulk density and particle density (0.131 g cm−3 and 0.583 g cm−3, respectively), and higher porosity (76.56%) while the FM-BC had highest contents of fixed carbon (46.83%). The pH was slightly neutral for SF-BC and RH-BC but alkaline for FM-BC. The electrical conductivity and TDS were considerably higher in FM-BC while the CEC was higher in RH-BC (28.24 cmol kg−1). The recalcitrance index (R50) showed that all the biochars were minimally degradable (0.7 ˃ R50 ≥ 0.5). The SF-BC exhibited highest stability with R50 value of 0.64 and also showed highest C sequestration potential (43.68%). Hence, it is concluded that thermal conversion of sugarcane filter cake waste into biochar might serve as a potential candidate to increase soil organic C pool if applied as soil amendment.
Tayyba Kanwal Choudhary; Khalid Saifullah Khan; Qaiser Hussain; Munir Ahmad; Muhammad Ashfaq. Feedstock-induced changes in composition and stability of biochar derived from different agricultural wastes. Arabian Journal of Geosciences 2019, 12, 1 -13.
AMA StyleTayyba Kanwal Choudhary, Khalid Saifullah Khan, Qaiser Hussain, Munir Ahmad, Muhammad Ashfaq. Feedstock-induced changes in composition and stability of biochar derived from different agricultural wastes. Arabian Journal of Geosciences. 2019; 12 (19):1-13.
Chicago/Turabian StyleTayyba Kanwal Choudhary; Khalid Saifullah Khan; Qaiser Hussain; Munir Ahmad; Muhammad Ashfaq. 2019. "Feedstock-induced changes in composition and stability of biochar derived from different agricultural wastes." Arabian Journal of Geosciences 12, no. 19: 1-13.
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.
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.
Munir Ahmad; Adel Ghoneim; Saud S. Al-Oud; Khaled D. Alotaibi; Mahmoud Nadeem. Acidulated activation of phosphate rock enhances release, lateral transport and uptake of phosphorus and trace metals upon direct-soil application. Soil Science and Plant Nutrition 2019, 65, 183 -195.
AMA StyleMunir Ahmad, Adel Ghoneim, Saud S. Al-Oud, Khaled D. Alotaibi, Mahmoud Nadeem. Acidulated activation of phosphate rock enhances release, lateral transport and uptake of phosphorus and trace metals upon direct-soil application. Soil Science and Plant Nutrition. 2019; 65 (2):183-195.
Chicago/Turabian StyleMunir Ahmad; Adel Ghoneim; Saud S. Al-Oud; Khaled D. Alotaibi; Mahmoud Nadeem. 2019. "Acidulated activation of phosphate rock enhances release, lateral transport and uptake of phosphorus and trace metals upon direct-soil application." Soil Science and Plant Nutrition 65, no. 2: 183-195.
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.
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.