乙二胺四乙酸
环境化学
放线菌门
化学
环境修复
土壤水分
污染
微生物种群生物学
土壤污染
土壤微生物学
门
细菌
生物
螯合作用
生态学
16S核糖体RNA
有机化学
遗传学
作者
Xiaomei Pan,Shirong Zhang,Ting Li,Jinyi Ouyang,Guoshu Gong,Guiyin Wang,Xiaoxun Xu,Yulin Pu,Lulu Long,Yongxia Jia
标识
DOI:10.1016/j.ecoenv.2022.113862
摘要
Toxic metal contamination causes a great threat to soil ecosystem and human health. Soil washing is a fast practice for removing metals, but its influences on microbial diversity and the stability of soil ecosystem remain unknown. In this study, ethylenediaminetetraacetic acid (EDTA), citric acid (CA), and fermented pineapple peel residue (FPP) were used as representatives of chelates, low molecular organic acids and biological materials to wash Pb-polluted soils, and their impacts on microbial community were investigated. Washing with these agents effectively removed Pb, but altered microbial community structure. After washing with EDTA, CA, and FPP, 3–8 bacterial phyla and 1 fungal phylum greatly increased, while 7–20 bacterial and 0–6 fungal phyla severely decreased or even disappeared. The alterations of different microbiomes were closely related to soil metal fractions. The labile metal fraction had negative effects on most bacteria and fungi, but also showed positive influences on Actinobacteria, Patescibacteria, and Fusobacteria. The moderately stable and stable fractions were nontoxic to the most microbes, but still harmful to Patescibacteria and Deinococcus-Thermus. These findings provide new insights for the effects of soil washing remediation and toxicity of metal fractions on the microbiomes with different abundance.
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