A biochar supported magnetic metal organic framework for the removal of trivalent antimony

Zhu, Guocheng; Lin, Jialin; Qian, Yuan; Wang, Xiaogfeng; Zhao, Zilong; Hursthouse, Andrew; Wang, Zhenghua; Li, Qingbo

doi:10.1016/j.chemosphere.2021.131068

Cited by 61 publications

(13 citation statements)

References 59 publications

(51 reference statements)

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“…3− , has also been reported in other studies [2,37]. This phenomenon can be explained by the high affinity of PO 4…”

Section: Effect Of the Presence Of Anionssupporting

confidence: 79%

“…Antimony (Sb), a hazardous element that is toxic to human health, causes several diseases such as respiratory irritation, pneumoconiosis, high blood cholesterol, low blood sugar, and cancer [1,2]. Due to the high toxicity and hazardousness of Sb, the World Health Organization (WHO) and some countries regulate its standard concentration in drinking water: WHO, 20.0 µg/L [3]; the United States Environmental Protection Agency, 6.0 µg/L [4]; and European Union, 5.0 µg/L [5].…”

Section: Introductionmentioning

confidence: 99%

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Application of Fe-Impregnated Biochar from Cattle Manure for Removing Pentavalent Antimony from Aqueous Solution

et al. 2021

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This study assessed the applicability of Fe-impregnated biochar derived from cattle manure (Fe-CMB) as an adsorbent for removing Sb(V) from aqueous solutions and investigated the Sb(V) adsorption mechanism. Fe-CMB was mainly composed of C, O, Cl, Fe, Ca, and P, and the adsorption of Sb(V) onto Fe-CMB was identified using an energy dispersive spectrometer and Fourier transform infrared spectroscopy. Sb(V) adsorption reached equilibrium within 6 h, and the Sb(V) adsorption data as a function of time were well described by the pseudo-second-order model. The Langmuir isotherm model fit the equilibrium data better than the Freundlich model. The maximum adsorption capacity of Fe-CMB for Sb(V) obtained from the Langmuir model was 58.3 mg/g. Thermodynamic analysis of Sb(V) adsorption by Fe-CMB indicated that the adsorption process was exothermic and spontaneous. The Sb(V) removal percentage increased with the Fe-CMB dose, which achieved a removal of 98.5% at 10.0 g/L Fe-CMB. Increasing the solution pH from 3 to 11 slightly reduced Sb(V) adsorption by 6.5%. The inhibitory effect of anions on Sb(V) adsorption followed the order: Cl− ≈ NO3− < SO42− < HCO3− < PO43−.

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“…3− , has also been reported in other studies [2,37]. This phenomenon can be explained by the high affinity of PO 4…”

Section: Effect Of the Presence Of Anionssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Application of Fe-Impregnated Biochar from Cattle Manure for Removing Pentavalent Antimony from Aqueous Solution

et al. 2021

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“…In recent decades, natural biogeochemical release and anthropogenic activities such as mining, metallurgy, and widespread use of Sb-containing products (e.g., pigments, batteries, and flame retardants) have triggered the Sb contamination in the environment worldwide (Wei et al 2020;Chen et al 2022b). Considering the potential teratogenicity and carcinogenicity of Sb to human beings, the World Health Organization (WHO) has set the maximum total Sb limit in drinking water as 20 µg L − 1 (Zhu et al 2021). China and Japan have, however, set more stringent limits, which are 5 and 2 µg L − 1 , respectively (Xiong et al 2020).…”

Section: Insights Into Simultaneous Adsorption and Oxidation Of Antim...mentioning

confidence: 99%

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Chen

Gao

et al. 2022

Biochar

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Removal of antimonite [Sb(III)] from the aquatic environment and reducing its biotoxicity is urgently needed to safeguard environmental and human health. Herein, crawfish shell-derived biochars (CSB), pyrolyzed at 350, 500, and 650°C, were used to remediate Sb(III) in aqueous solutions. The adsorption data best fitted to the pseudo-second-order kinetic and Langmuir isotherm models. Biochar produced at 350°C (CSB350) showed the highest adsorption capacity (27.7 mg g− 1), and the maximum 78% oxidative conversion of Sb(III) to Sb(V). The adsorption results complemented with infrared (FTIR), X-ray photoelectron (XPS), and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy analyses indicated that the adsorption of Sb(III) on CSB involved electrostatic interaction, surface complexation with oxygen-containing functional groups (C = O, O = C–O), π–π coordination with aromatic C = C and C–H groups, and H-bonding with –OH group. Density functional theory calculations verified that surface complexation was the most dominant adsorption mechanism, whilst π–π coordination and H-bonding played a secondary role. Furthermore, electron spin resonance (ESR) and mediated electrochemical reduction/oxidation (MER/MEO) analyses confirmed that Sb(III) oxidation at the biochar surface was governed by persistent free radicals (PFRs) (•O2− and •OH) and the electron donating/accepting capacity (EDC/EAC) of biochar. The abundance of preferable surface functional groups, high concentration of PFRs, and high EDC conferred CSB350 the property of an optimal adsorbent/oxidant for Sb(III) removal from water. The encouraging results of this study call for future trials to apply suitable biochar for removing Sb(III) from wastewater at pilot scale and optimize the process. Graphical abstract

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“…The adsorption of Sb( v ) on ZIC can be determined in three steps, and the surface adsorption is controlled by intraparticle diffusion. 28 The intraparticle diffusion model determines whether intraparticle diffusion is the only rate-limiting step in the adsorption process by observing the linear relationship between Q t and t 0.5 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of nano-zirconium-iron oxide supported by activated carbon composite for the removal of Sb(v) in aqueous solution

et al. 2021

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A biochar supported magnetic metal organic framework for the removal of trivalent antimony

Cited by 61 publications

References 59 publications

Application of Fe-Impregnated Biochar from Cattle Manure for Removing Pentavalent Antimony from Aqueous Solution

Application of Fe-Impregnated Biochar from Cattle Manure for Removing Pentavalent Antimony from Aqueous Solution

Insights into simultaneous adsorption and oxidation of antimonite [Sb(III)] by crawfish shell-derived biochar: spectroscopic investigation and theoretical calculations

Synthesis of nano-zirconium-iron oxide supported by activated carbon composite for the removal of Sb(v) in aqueous solution

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