Investigation on cadmium ions removal from water by different raw materials-derived biochars

Chen, Guanyi; Wang, Chuanbin; Tian, Jingnan; Liu, Juping; Ma, Qingjie; Liu, Bin; Li, Xiangping

doi:10.1016/j.jwpe.2020.101223

Cited by 28 publications

(5 citation statements)

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“…When the pH value of the solution was low (pH = 2.0), a large amount of H + was present in the solution, and the biochar was protonated and electrostatically repulsed with positively charged heavy metal ions. Simultaneously, the biochar released many cations (such as Ca 2+ , Mg 2+ , and K + ) in the low pH solution (e.g., Zn(II) adsorption, Figure S2 ), which competed with heavy metals for sorption sites and, thus, reduced the adsorption capacity [ 38 ]. As the pH value was increased to 3.0, the H + content in the solution decreased, and the biochar was deprotonated.…”

Section: Resultsmentioning

confidence: 99%

Efficient Removal of Cu(II), Zn(II), and Cd(II) from Aqueous Solutions by a Mineral-Rich Biochar Derived from a Spent Mushroom (Agaricus bisporus) Substrate

et al. 2020

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This study evaluated the novel application of a mineral-rich biochar derived from a spent Agaricus bisporus substrate (SAS). Biochars with various pyrolysis temperatures (350–750 °C) were used to remove Cu(II), Zn(II), and Cd(II) from aqueous solutions. The adsorption characteristics and removal mechanisms of the biochars were investigated. The adsorption kinetics and isotherm data were fitted well by pseudo-second-order and Freundlich models. The Langmuir maximum removal capacity (Qmax) values of Cu(II), Zn(II), and Cd(II) were ordered as SAS750 > SAS350 > SAS550, and the Qmax values of SAS750 were 68.1, 55.2, and 64.8 mg·g−1, respectively. Overall, the removal mechanisms of biochar at a low production temperature (350 °C) to Cu(II), Zn(II), and Cd(II) were mainly via ion exchange (54.0, 56.0, and 43.0%), and at a moderate production temperature (550 °C), removal mechanisms were mainly via coordination with π electrons (38.3, 45.9, and 55.0%), while mineral precipitation (65.2, 44.4, and 76.3%, respectively) was the dominant mechanism at a high produced temperature (750 °C). The variation of the mutual effect of minerals and heavy metals was the predominant factor in the sorption mechanism of mineral precipitation and ion exchange. The results demonstrated that spent Agaricus bisporus substrate biochar is a potential candidate for the efficient removal of heavy metals, which provides a utilization route for spent mushroom substrates.

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Section: Resultsmentioning

confidence: 99%

Efficient Removal of Cu(II), Zn(II), and Cd(II) from Aqueous Solutions by a Mineral-Rich Biochar Derived from a Spent Mushroom (Agaricus bisporus) Substrate

et al. 2020

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“…The intensity of this peak increased first and then decreased with the increase of PP content in feedstock; this result was consistent with the change of O content observed in elementary composition. The shoulder near 1580 cm −1 corresponded to the C=O, C=C stretching vibration [34]. The peaks at 1429 cm −1 and 1048 cm −1 were assigned to C=O stretching vibration in CO 3 2− and C-O stretching vibration, respectively [35].…”

Section: Ftir Analysismentioning

confidence: 96%

“…C=C stretching vibration [34]. The peaks at 1429 cm −1 and 1048 cm −1 were assigned to C=O stretching vibration in CO3 2− and C-O stretching vibration, respectively [35].…”

Section: Ftir Analysismentioning

confidence: 99%

Characterization of Biochars Produced by Co-Pyrolysis of Hami Melon (Cantaloupes) Straw Mixed with Polypropylene and Their Adsorption Properties of Cadmium

Huang

Zhang

et al. 2021

IJERPH

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Reuse of waste from Hami melon (cantaloupes) straws (HS) mingled with polypropylene (PP) ropes is necessary and beneficial to mitigate environmental pollution. The objective of this study was to investigate the characteristics and mechanisms of Cd2+ adsorption on biochars produced by co-pyrolysis of HS-PP with various mixing ratios. N2-sorption, scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS), elemental analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermal gravity, and differential thermal gravity (TG/DTG) were applied to evaluate the physicochemical properties of materials. Batch adsorption experiments were carried out for investigating the effects of initial pH, Cd2+ concentration, and adsorption time. It was found that the Langmuir and pseudo-second-order models fitted best for the experimental data, indicating the dominant adsorption of co-pyrolysis biochars is via monolayer adsorption. Biochar derived at 4/1 mixing ratio of HS/PP by weight percentage had the highest adsorption capacity of 108.91 mg·g−1. Based on adsorption isotherm and kinetic analysis in combined with EDS, FTIR, and XRD analysis, it was concluded that the main adsorption mechanism of co-pyrolysis biochar involved the surface adsorption, cation exchange, complexation of Cd2+ with surface functional groups, and chemical precipitation. This study also demonstrates that agricultural wastes to biochar is a sustainable way to circular economy.

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“…Common materials for biochar production include crop residues [31][32][33], wood, animal manure [34], and sewage sludge [35]. The adsorption capacity of biochar with different raw materials (sludge, cow dung, corn stalk, and willow) for heavy metals was explored, and it was found that corn stalk biochar had the best adsorption effect, which might be attributed to its larger specific surface area and excellent pore structure [36]. Biochar has a porous structure, large specific surface area, and abundant surface functional groups, which enables it to efficiently adsorb Pb from aqueous solutions [37].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Lead from Aqueous Solution by Biochar: A Review

Wang

et al. 2022

Clean Technol.

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Industrialization has resulted in the discharge of a certain amount of lead (Pb) from industrial sources causing damage risk to water quality and human health. Adsorption is an effective technique to remove Pb, and biochar has been widely studied owing to its advantages of low cost and high adsorption capacity. This review summarizes the influence of raw materials and modification methods on the adsorption capability of biochar. The adsorption isotherms and kinetics of biochar were summarized, and the main Pb removal mechanisms were studied systematically. In addition, the challenges and future perspectives were discussed comprehensively. It is expected that the review could provide insightful fundamentals for the experimental research and practical applications of biochar.

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Investigation on cadmium ions removal from water by different raw materials-derived biochars

Cited by 28 publications

References 50 publications

Efficient Removal of Cu(II), Zn(II), and Cd(II) from Aqueous Solutions by a Mineral-Rich Biochar Derived from a Spent Mushroom (Agaricus bisporus) Substrate

Efficient Removal of Cu(II), Zn(II), and Cd(II) from Aqueous Solutions by a Mineral-Rich Biochar Derived from a Spent Mushroom (Agaricus bisporus) Substrate

Characterization of Biochars Produced by Co-Pyrolysis of Hami Melon (Cantaloupes) Straw Mixed with Polypropylene and Their Adsorption Properties of Cadmium

Adsorption of Lead from Aqueous Solution by Biochar: A Review

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