Synthesis and environmental applications of biochar-supported nano-zero-valent iron composites: a review

被引:0
作者
Xinlian Zhong
Yujian Lai
Xuemei Wang
Menglu Wang
Wei Han
Meng Zhang
Hongbing Ji
机构
[1] University of Science and Technology,School of Energy and Environmental Engineering
[2] Beijing,undefined
来源
Environmental Chemistry Letters | 2024年 / 22卷
关键词
Nano-zero-valent iron; Biochar; Environmental pollution; Heavy metal; Environmental remediation; Adsorption;
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学科分类号
摘要
In the context of increasing pollution of almost all environmental media, there is a need for efficient and sustainable techniques to remove contaminants. Here, we review the biochar-supported nano-zero-valent iron composites with focus on their synthesis from wood, sludges and agricultural waste, and on their application to the removal of heavy metals in waters and soils. We also discuss removal mechanisms. We observe that metal removal rates of 90% and above can be achieved. The composite performance is influenced by the biochar feedstock, the pyrolysis temperature, generally within 300–1000 °C, and the iron/carbon ratio, e.g. 4:1, 2:1, and 1:2. Removal mechanisms include adsorption, reduction, and co-precipitation. We also discuss the optimization of preparation methods, their application in real environments, and the removal mechanisms for complex pollutants.
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页码:1345 / 1363
页数:18
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共 392 条
[1]  
Amiri MJ(2018)Numerical simulation of Cd(II) removal by ostrich bone ash supported nanoscale zero-valent iron in a fixed-bed column system: Utilization of unsteady advection-dispersion-adsorption equation J Water Process Eng 25 1-14
[2]  
Roohi R(2019)Unraveling sorption of nickel from aqueous solution by KMnO Chemosphere 214 846-854
[3]  
Gil A(2023) and KOH-modified peanut shell biochar: implicit mechanism J Chem Technol Biotechnol 98 22-44
[4]  
An Q(2020)A review on preparation, surface enhancement and adsorption mechanism of biochar-supported nano zero-valent iron adsorbent for hazardous heavy metals Chemosphere 250 12010-12025
[5]  
Jiang Y-Q(2021)Comprehensive systematic review and meta-analysis of dyes adsorption by carbon-based adsorbent materials: classification and analysis of last decade studies Environ Pollut 277 153-163
[6]  
Nan H-Y(2018)Bone-derived biochar improved soil quality and reduced Cd and Zn phytoavailability in a multi-metal contaminated mining soil Environ Sci Technol 52 1123-1139
[7]  
Awang NA(2018)Advances in surface passivation of nanoscale zerovalent iron: a critical review Water Res 137 12571-12583
[8]  
Salleh WNW(2022)Arsenic sorption on zero-valent iron-biochar complexes J Environ Chem Eng 10 1607-1616
[9]  
Aziz F(2020)Attributes of wood biochar as an efficient adsorbent for remediating heavy metals and emerging contaminants from water: a critical review and bibliometric analysis Heliyon 6 235-253
[10]  
Azari A(2021)Heavy metal pollution in the environment and their toxicological effects on humans Chemosphere 285 13184-13195