Mitigation of arsenic accumulation in arugula ( Eruca sativa Mill.) using Fe/Al/Zn impregnated biochar composites
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RESEARCH ARTICLE
Mitigation of arsenic accumulation in arugula (Eruca sativa Mill.) using Fe/Al/Zn impregnated biochar composites Runze Sun 1 & Jie Wang 2 & Yutao Peng 2 & Hongmei Wang 1 & Qing Chen 2 Received: 20 May 2020 / Accepted: 10 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Arsenic (As) contamination of aquatic and soil environments is a global concern, highlighting the importance of As removal via high-efficiency and low-cost removal technologies. In the present study, novel trimetallic biochar was developed through pyrolyzing corn straw impregnated with inexpensive metal Fe/Al/Zn (hydr)oxides. The results of SEM, FTIR, and XRD verified the formation of metal oxyhydroxides on the surface of the modified biochars, and the modification increased the specific surface area (SSA), total pore volume (TPV), and surface charge of the Fe/Al/Zn (hydr)oxides modified biochar (FAZ-CB). Compared with the original biochar, higher sorption rates and capacities was observed for the FAZ-CB. The maximum As (V) adsorption capacities of FAZ-CB reached 82.9 mg g−1. A pot experiment showed that application of FAZ-CB decreased bioavailable As fractions in the red soil significantly reduced the uptake of As by arugula in edible part and root (42.6 and 56.8%, respectively). The present study demonstrated the superiority of FAZ-CB in the As(V) immobilization in red soil, suggesting that it is a promising candidate for practical application for As immobilization. Therefore, FAZ-CB can be used as a promising functionalized biochar to remediate As contaminated red soil. Keywords Modified biochar . Metal hydroxides . Adsorption . Arsenate . Agricultural wastes . Soil remediation
Introduction Due to its high toxicity and carcinogenicity, arsenic (As) has been recognized as a group 1 carcinogen by the International Agency on Research Cancer (International Agency for Research on Cancer 2004). Previous studies indicated that chronic exposure to As may affect all of the organs and systems of the human body (Kabir and Chowdhury 2017). As is mainly introduced to the environment via anthropogenic Responsible Editor: Zhihong Xu Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-10476-x) contains supplementary material, which is available to authorized users. * Jie Wang [email protected] * Qing Chen [email protected] 1
College of Science, China Agricultural University, Beijing 100193, China
2
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
activities, including mining, fossil fuel combustion, and pesticide usage (Gao et al. 2020). In As-affected areas, the high concentrations of As in soil or irrigation water may lead to an elevation in As concentration in cereals, vegetables, or other crop products, potentially causing harmful effects on human health (Guan et al. 2020; Liu et al. 2020a). Therefore, the remediation of the As-polluted waterbody and soil is urgent and has attracted wide interest
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