Characterization, efficiency, and mechanism in removing heavy metals by a mixed biochar derived from sludge and banana peel

Heavy metal contamination is a serious concern worldwide. In order to remove heavy metal ions from wastewater efficiently, multifunctinoal biomass-based material have been utilized. Herein, hyperbranched polymer modified cellulose biomass (HBP-CB) derived from textile waste materials ramie fibers was successfully developed by construction of Fe3O4/SiO2/polymer multiple structure through an etch-fill strategy. Specifically, Fe3O4 and SiO2 particles were introduced to the oxidation etching cellulose surface, and subsequently modified by hyperbranched polymer The adsorption behavior of the adsorbent toward two classes of heavy metal ions was investigated. The results indicated that HBP-CB owned excellent adsorption capacities for chromium and Cu(II) with maximum 123.5 mg/g and 149.0 mg/g and magnetic recovery performance in aqueous medium. These are owing to the oxidization etching biomass matrix with a higher BET surface area of 4.61 m2/g and the hybrid multiple structure modified by functional hyperbranched polymer with high dense adsorptive sites on the matrix. The adsorption behavior was well described by pseudo-second-order kinetic model and Langmuir isotherm model, revealing a rapid surface adsorption and monolayer spontaneous chemical adsorption. For recycling, 81% of adsorption capacity could be retained after five recovery cycles. These demonstrate that the hybrid multiple structure based on biomass, nanomaterials and polymer could provide sustainable and high-performance adsorption property for wastewater treatment.

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Fe₃O₄/SiO₂/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption

Tao

Zhu

Huang

et al. 2023

Journal of Industrial Textiles

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Adsorption characteristics of Zn(II) and Pb(II) by river sediments under hydrodynamic conditions

Zhang

Shi

2023

Water Supply

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This study aims to investigate the process and mechanism of adsorption of Zn(II) and Pb(II) by river sediments under hydrodynamic conditions and provide a basis for preventing and controlling heavy metals in rivers. For this purpose, surface sediments were collected from the Ganjiang River in Nanchang, Jiangxi Province, China, and the adsorption kinetics, isotherms, and the effect of different initial pH on the adsorption process of heavy metals Zn(II) and Pb(II) under different hydrodynamic conditions were simulated using the particle entrainment simulator (PES) resuspension simulation device. The results showed that under different hydrodynamic conditions, the adsorption equilibrium of Zn(II) and Pb(II) can be reached within 6 h, and the adsorption amount of Pb(II) by the sediment was significantly higher than that of Zn(II). Pseudo-second-order dynamics and the Elovich model can better describe the kinetics of adsorption in both metals (R2 > 0.90). Langmuir and Freundlich's models could better simulate the adsorption isotherms of Zn(II) and Pb(II) on sediments. According to the results of △G and –F, the adsorption of Zn(II) and Pb(II) is mainly physical adsorption. Furthermore, there are certain differences in the adsorption of heavy metals Zn(II) and Pb(II) by sediments at different pH values.

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Characterization, efficiency, and mechanism in removing heavy metals by a mixed biochar derived from sludge and banana peel

Cited by 2 publications

References 54 publications

Fe₃O₄/SiO₂/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption

Fe₃O₄/SiO₂/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption

Adsorption characteristics of Zn(II) and Pb(II) by river sediments under hydrodynamic conditions

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Characterization, efficiency, and mechanism in removing heavy metals by a mixed biochar derived from sludge and banana peel

Cited by 2 publications

References 54 publications

Fe3O4/SiO2/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption

Fe3O4/SiO2/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption

Adsorption characteristics of Zn(II) and Pb(II) by river sediments under hydrodynamic conditions

Contact Info

Product

Resources

About

Fe₃O₄/SiO₂/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption

Fe₃O₄/SiO₂/polymer hybrid biosorbent based on an etch-fill strategy for heavy metal ion adsorption