Journal article
Coupled sorptive and oxidative antimony(III) removal by iron-modified biochar: Mechanisms of electron-donating capacity and reactive Fe species
Environmental pollution (1987), Vol.337, 122637
15/11/2023
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Source: InCites
Abstract
Sorption and oxidation are two potential pathways for the decontamination of trivalent antimony (Sb(III))-bearing water, using iron (Fe)-modified biochar (FeBC). Here we investigated the sorption and oxidation behavior of FeBC for Sb(III) in aqueous solutions. Results revealed that Sb(III) removal by FeBC was significantly improved showing the maximum Sb(III) sorption (64.0 mg g−1). Density functional theory (DFT) calculations indicated that magnetite (Fe3O4) in FeBC offered a sorption energy of −0.22 eV, which is 5 times that of non-modified biochar. With the addition of peroxymonosulfate (PMS), the sorption of Sb(III) on FeBC was 7 times higher than that on BC, indicating the sorption capacity of FeBC for Sb(III) could be substantially increased by adding oxidizing agents. Electrochemical analysis showed that Fe modification imparted FeBC higher electron-donating capacity than that of BC (0.045 v. s. 0.023 mmol e− (g biochar)−1), which might be the reason for the strong Sb(III) oxidation (63.6%) on the surface of FeBC. This study provides new information that is key for the development of effective biochar-based composite materials for the removal of Sb(III) from drinking water and wastewater. The findings from this study have important implications for protecting human health and agriculture.
Details
- Title
- Coupled sorptive and oxidative antimony(III) removal by iron-modified biochar: Mechanisms of electron-donating capacity and reactive Fe species
- Creators
- Yurong Gao - Foshan UniversityHanbo Chen - Zhejiang University of Science and TechnologyZheng Fang - Foshan UniversityNabeel Khan Niazi - University of FaisalabadKwasi Adusei-Fosu - AgResearchJianhong Li - Chinese Academy of Tropical Agricultural SciencesXing Yang - Hainan UniversityZhongzhen Liu - Guangdong Academy of Agricultural SciencesNanthi S. Bolan - University of Western AustraliaBin Gao - University of FloridaDeyi Hou - Tsinghua UniversityChenghua Sun - Swinburne University of TechnologyJun Meng - Shenyang Agricultural UniversityWenfu Chen - Shenyang Agricultural UniversityBert F. Quin - Quin Environmentals (NZ)Hailong Wang - Foshan University
- Publication Details
- Environmental pollution (1987), Vol.337, 122637
- Publisher
- Elsevier
- Identifiers
- 991013141903602368
- Copyright
- © 2023 Elsevier Ltd. All rights reserved.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article