Assessment of the Effects of Heavy Metals in Soils after Removal by Nanoscale Zero-Valent Iron with Three Methods

Tianen Zhang, Bing Xia, Yuanyuan Lu, Xiaoyu Zhang, Hongfeng Chen, Rongrong Ying and Shu Jin
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Tianen Zhang: School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China
Bing Xia: Research Academy of Environmental Sciences of Anhui Province, Hefei 230071, China
Yuanyuan Lu: Nanjing Institute of Environmental Sciences, MEE, Nanjing 210042, China
Xiaoyu Zhang: Nanjing Institute of Environmental Sciences, MEE, Nanjing 210042, China
Hongfeng Chen: Research Academy of Environmental Sciences of Anhui Province, Hefei 230071, China
Rongrong Ying: Nanjing Institute of Environmental Sciences, MEE, Nanjing 210042, China
Shu Jin: Nanjing Institute of Environmental Sciences, MEE, Nanjing 210042, China

Sustainability, 2022, vol. 14, issue 4, 1-10

Abstract: Nanoscale zero-valent iron (nZVI) has been broadly applied in the remediation of heavy metals pollution. In this research, the toxicity characteristic leaching procedure (TCLP), the in vitro gastrointestinal (IVG) method, and the diffusive gradients in thin-films (DGT) technique were used to evaluate the effects of heavy metals in soil with remediation by nZVI. The results indicate that, compared with the dose of 0.5 g·L −1 , the nZVI in the dose of 1.0 g·L −1 can remove the heavy metals in the soil. The leaching toxicities of the heavy metals (Cr, Cu, Zn, Pb) showed apparent decreases after the remediation by nZVI. In the gastric phase, the highest bioaccessibility values of the Cr, Cu, Zn, Pb were decreased by 27.2, 31.7, 11.7, and 20.1%, respectively. Moreover, in the gastric phase, the highest bioaccessibility values of the Cr, Cu, Zn, Pb were decreased by 5.5, 1.29, 8.0, and 7.3%, respectively. The availabilities of the heavy metals were also reduced. The above results show that the nZVI effectively reduced the heavy metal pollution in the soil.

Keywords: nZVI; heavy metal soil pollution; TCLP; IVG; DGT (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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