Immobilization and mitigation of chromium toxicity in aqueous solutions and tannery waste-contaminated soil using biochar and polymer-modified biochar

Rafique, Muhammad Imran; Usman, Adel R.A.; Ahmad, Munir; Al-Wabel, Mohammad I.

doi:10.1016/j.chemosphere.2020.129198

Cited by 62 publications

(24 citation statements)

References 95 publications

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“…Carbonization of raw FS resulted in considerably higher carbon contents in BC which showed higher recalcitrant potential, carbon stability and aromaticity of BC over FS. A similar trend of BC characterization was found in previous studies conducted by Rafique et al [ 19 , 20 ]. The moisture contents of manure were relatively higher (13.03%), while volatiles, fixed carbon, and ash contents were in lower range of 38.72%, 19.29%, and 28.96%, respectively.…”

Section: Resultssupporting

confidence: 89%

“…Employing BC as soil amendment for removing pollutants has been considered more effective and auspicious approach in comparison with other conventional techniques. Diverse surface properties, higher surface area, porosity, several surface functional groups, ample carbon contents, and surface charge make it an apposite adsorbent for a lot of organic and inorganic pollutants [ 18 , 19 , 20 ]. Therefore, if applied in contaminated soil, BC may reduce the mobility/leaching of pollutants on one hand, and improve soil physiochemical properties on the other hand.…”

Section: Introductionmentioning

confidence: 99%

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Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar

et al. 2021

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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.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar

et al. 2021

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“…Cr(VI) has much higher mobility in water and soil and can be transformed into various reactive and toxic intermediates, eventually endangering human health because of the accumulation characteristics [16,17]. Cr(VI) can cause cell mutations and lead to skin injury, intestinal diseases, kidney diseases, cancer, and other diseases [18][19][20][21]. Consequently, Cr(VI) is a significant threat to the quality of water, soil environments, and human health and has been considered a top-priority pollutant to be addressed in water remediation [22].…”

Section: Introductionmentioning

confidence: 99%

Mitigating the Health Effects of Aqueous Cr(VI) with Iron-Modified Biochar

Zheng

Duan

2022

IJERPH

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A large amount of chromium (Cr) has entered the natural environment from the wastewater and waste residues, and the hexavalent (Cr(VI)) is highly poisonous, threatening the ecological environment and human health directly. In this study, iron-modified biochar was prepared using honeysuckle residue as raw material and the ferric chloride impregnation method. Batch Cr(VI) adsorption experiments were carried out using the modified honeysuckle-derived biochar (MHDB) as an adsorbent. The results indicate that a pH of 2 was best for the adsorption removal of Cr(VI) in the initial pH range of 2–10. The adsorption kinetic data fitted the pseudo-second-order model best out of the two models, and the Langmuir model was better than the Freundlich model to describe the adsorption process. Thermodynamic analysis indicated that the adsorption process of Cr(VI) on MHDB had an endothermic and spontaneous nature, and the increasing temperature was conducive to the adsorption. The main mechanisms of Cr(VI) adsorption might be the physical adsorption (electrostatic interactions) and chemical adsorption (ion exchange, the reduction of Cr(VI) to Cr(III)). The efficient adsorption of Cr(VI) makes MHDB a potential material for Cr(VI)-containing wastewater treatment. This study provides a feasible adsorption material for mitigating the environmental hazards of chromium, which has a certain reference value for protecting environmental health.

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“… 13 − 20 Polymeric materials are among the applied biochar modifying substrates that result in better physicochemical properties and enhanced removal efficiency for various pollutants. 18 Recent studies have demonstrated that polymeric biochar adsorbents offer better mechanical strength, enhanced durability, high adsorption capacity, and improved recyclability. 21 Furthermore, polymeric biochar hydrogel adsorbents are expected to be a good addition to the biocompatible adsorbents for uranium removal due to the combination of the porous network of biochar with the high chemical affinity of polymeric hydrogels.…”

Section: Introductionmentioning

confidence: 99%

Green Hydrogel-Biochar Composite for Enhanced Adsorption of Uranium

2021

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Uranium is the backbone of the nuclear fuel used for energy production but is still a hazardous environmental contaminant; thus, its removal and recovery are important for energy security and environmental protection. So far, the development of biocompatible, efficient, economical, and reusable adsorbents for uranium is still a challenge. In this work, a new orange peel biochar-based hydrogel composite was prepared by graft polymerization using guar gum and acrylamide. The composite’s structural, morphological, and thermal characteristics were investigated via Fourier transform infrared (FTIR), scanning electron microscope (SEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) methods. The composite’s water absorption properties were investigated in different media. The performance of the prepared composite in adsorbing uranium (VI) ions from aqueous media was systematically investigated under varying conditions including solution’s acidity and temperature, composite dose, contact time, and starting amount of uranium. The adsorption efficiency increased with solution pH from 2 to 5.5 and composite dose from 15 to 50 mg. The adsorption kinetics, isotherms, and thermodynamics parameters were analyzed to get insights into the process’s feasibility and viability. The equilibrium data were better described through a pseudo-second-order mechanism and a Langmuir isotherm model, indicating a homogeneous composite surface with the maximum uranium (VI) adsorption capacity of 263.2 mg/g. The calculated thermodynamic parameters suggested that a spontaneous and endothermic process prevailed. Interference studies showed high selectivity toward uranium (VI) against other competing cations. Desorption and recyclability studies indicated the good recycling performance of the prepared composite. The adsorption mechanism was discussed in view of the kinetics and thermodynamics data. Based on the results, the prepared hydrogel composite can be applied as a promising, cost-effective, eco-friendly, and efficient material for uranium (VI) decontamination.

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Immobilization and mitigation of chromium toxicity in aqueous solutions and tannery waste-contaminated soil using biochar and polymer-modified biochar

Cited by 62 publications

References 95 publications

Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar

Sulfamethoxazole Leaching from Manure-Amended Sandy Loam Soil as Affected by the Application of Jujube Wood Waste-Derived Biochar

Mitigating the Health Effects of Aqueous Cr(VI) with Iron-Modified Biochar

Green Hydrogel-Biochar Composite for Enhanced Adsorption of Uranium

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