Spatial Distribution of Toxic Metal(loid)s and Microbial Community Analysis in Soil Vertical Profile at an Abandoned Nonferrous Metal Smelting Site

Jiejie Yang, Siqi Wang, Ziwen Guo, Yan Deng, Menglong Xu, Siyuan Zhang, Huaqun Yin, Yili Liang, Hongwei Liu, Bo Miao, Delong Meng, Xueduan Liu and Luhua Jiang
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Jiejie Yang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Siqi Wang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Ziwen Guo: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Yan Deng: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Menglong Xu: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Siyuan Zhang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Huaqun Yin: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Yili Liang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Hongwei Liu: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Bo Miao: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Delong Meng: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Xueduan Liu: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Luhua Jiang: School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

IJERPH, 2020, vol. 17, issue 19, 1-17

Abstract: In this study soils at different depths were collected in a Zn smelting site located in Zhuzhou City, China, in order to understand toxic metal(loid)s distribution and microbial community in vertical soil profile at a smelting site. Except Soil properties and metal(loid)s content, the richness and diversity of microbial communities in soil samples were analyzed via high-throughput Illumina sequencing of 16s rRNA gene amplicons. The results showed that the content of As, Pb, Cu, Cd, Zn, and Mn was relatively high in top soil in comparison to subsoil, while the concentration of Cr in subsoil was comparable with that in top soil due to its relative high background value in this soil layer. The bioavailability of Cd, Mn, Zn, and Pb was relative higher than that of As, Cr, and Cu. The diversity of soil microbial communities decreased with increasing depth, which might be ascribed to the decrease in evenness with increase in depth duo to the influence by environmental conditions, such as pH, TK (total potassium), CEC (cation exchange capacity), ORP (oxidation reduction potential), and Bio-Cu (bioavailable copper). The results also found Acidobacteria , Proteobacteria , Firmicutes , and Chloroflexi were dominant phyla in soil samples. At the genus level, Acinetobacter , Pseudomonas , and Gp7 were dominant soil microorganism. Besides, Environmental factors, such as SOM (soil organic matter), pH, Bio-Cu, Bio-Cd (bioavailable cadmium), and Bio-Pb (bioavailable lead), greatly impacted microbial community in surface soil (1–3 m), while ORP, TK, and AN concentration influenced microbial community in the subsoil (4–10 m).

Keywords: metal(loid)s pollution; smelting site; soils properties; microbial community analysis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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