Enhanced hexavalent chromium removal performance and stabilization by magnetic iron nanoparticles assisted biochar in aqueous solution: Mechanisms and application potential

Zhu, Shishu; Huang, Xiaochen; Wang, Dawei; Wang, Li; Ma, Fang

doi:10.1016/j.chemosphere.2018.05.046

Cited by 173 publications

(33 citation statements)

References 47 publications

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“…Several recent studies investigated the synthesis and characterization of iron-coated biochar for metal(loid) removal from aqueous media and found enhanced sorption of Cr(VI) (e.g. Zhu et al, 2018;Diao et al, 2018), Cu (e.g. Kolodynska and Bak, 2018;Yang et al, 2018b) as well as As (e.g.…”

Section: Introductionmentioning

confidence: 99%

Assessment of biochar and zero-valent iron for in-situ remediation of chromated copper arsenate contaminated soil

Frick

Tardif

Kandeler

et al. 2019

Science of The Total Environment

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Highlights  Chromate copper arsenate (CCA) contaminated soils pose risks to the environment  In-situ stabilization of CCA contaminated soil was tested with biochar and ZVI  Soil remediation was evaluated based on chemical and microbiological techniques  Biochar reduced bioavailable (Cu bio), but not water-extractable Cu (Cu water)  Combination of biochar and ZVI most effectively reduced toxic effects of CCA

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Section: Introductionmentioning

confidence: 99%

Assessment of biochar and zero-valent iron for in-situ remediation of chromated copper arsenate contaminated soil

Frick

Tardif

Kandeler

et al. 2019

Science of The Total Environment

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“…It means the MO could easily contact with the nZVI particles, so the chemical sorption is the main rate-limiting step compared to the mass transfer process. However, some other X-nZVI materials synthesized by liquid phase reduction method agreed with the pseudo-first-order model [14][15][16][17][18]. Here, X presents the carrier, such as clay [15], activated carbon [17], and mesoporous carbon [18].…”

Section: Kinetics Of Degradation Of Momentioning

confidence: 68%

Preparation of Biomass Activated Carbon Supported Nanoscale Zero-Valent Iron (Nzvi) and Its Application in Decolorization of Methyl Orange from Aqueous Solution

Zhang

Wang

2019

Water

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The nanoscale zero-valent iron (nZVI) has great potential to degrade organic polluted wastewater. In this study, the nZVI particles were obtained by the pulse electrodeposition and were loaded on the biomass activated carbon (BC) for synthesizing the composite material of BC-nZVI. The composite material was characterized by SEM-EDS and XRD and was also used for the decolorization of methyl orange (MO) test. The results showed that the 97.94% removal percentage demonstrated its promise in the remediation of dye wastewater for 60 min. The rate of MO matched well with the pseudo-second-order model, and the rate-limiting step may be a chemical sorption between the MO and BC-nZVI. The removal percentage of MO can be effectively improved with higher temperature, larger BC-nZVI dosage, and lower initial concentration of MO at the pH of 7 condition.

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“…Fe 3+ was flocculated on the surface of nZVI particles in the form of FeO(OH), which greatly increased the specific surface area and adsorption capacity of the material. The Cr 3+ and Fe 3+ precipitated together, as shown in Equations (10) and (11) and were adsorbed on flocs and BC [25]. capacity of the material.…”

Section: Degradation Mechanism For Reduction-adsorption Of Cr On Bc-nzvimentioning

confidence: 99%

“…Therefore, reducing Cr(VI) to Cr(III) and then removing Cr(III) by adsorption is considered to be a satisfactory solution [7][8][9]. Many methods have been applied for removing Cr(VI) from aqueous solutions, such as chemical reduction [10], ion exchange [11], precipitation [12], and adsorption [13]. The most common method is adsorption using alumina, clay, zeolite, and activated carbon as the adsorbing material [14,15].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Zero Valent Iron Supported by Biomass-Activated Carbon for Highly Efficient Total Chromium Removal from Electroplating Wastewater

Zhang

Zhu

Xiong

et al. 2019

Water

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The application potential of nanoscale zero valent iron (nZVI) in wastewater treatment is huge and has attracted a lot of attention. In this study, the composite material BC-nZVI was prepared by emulsion of nZVI and biomass-activated carbon (BC) under the mechanical agitation condition, and was characterized by SEM-EDX, XRD, XPS, and FTIR. The decontamination abilities of BC-nZVI were tested by the removal of total chromium (Cr) from electroplating wastewater. The results showed that the removal efficiencies of Cr in the electroplating wastewater by nZVI particles can be effectively improved when supported with BC, but cannot be improved in its storage capacity. The chemical adsorption process between the Cr and BC-nZVI is the main rate-limiting step in the removal of total Cr from wastewater, and multiple parameters such as dosage, pH, and initial concentration of Cr was found to affect the rate.

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Enhanced hexavalent chromium removal performance and stabilization by magnetic iron nanoparticles assisted biochar in aqueous solution: Mechanisms and application potential

Cited by 173 publications

References 47 publications

Assessment of biochar and zero-valent iron for in-situ remediation of chromated copper arsenate contaminated soil

Assessment of biochar and zero-valent iron for in-situ remediation of chromated copper arsenate contaminated soil

Preparation of Biomass Activated Carbon Supported Nanoscale Zero-Valent Iron (Nzvi) and Its Application in Decolorization of Methyl Orange from Aqueous Solution

Nanoscale Zero Valent Iron Supported by Biomass-Activated Carbon for Highly Efficient Total Chromium Removal from Electroplating Wastewater

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