标题: Stabilization and passivation of multiple heavy metals in soil facilitating by pinecone-based biochar: Mechanisms and microbial community evolution

作者: Lan, JR (Lan, Jirong); Zhang, SS (Zhang, Shanshan); Dong, YQ (Dong, Yiqie); Li, JH (Li, Jiahao); Li, SY (Li, Shiyao); Feng, L (Feng, Lu); Hou, HB (Hou, Haobo)

来源出版物: JOURNAL OF HAZARDOUS MATERIALS卷: 420文献号: 126588 DOI: 10.1016/j.jhazmat.2021.126588出版年: OCT 15 2021

摘要: Soil contamination by multiple heavy metals and As is one of the major environmental hazards recognized worldwide. In this study, pinecone-biochar was used for stabilization and passivation of Pb, Cu, Zn, Cr, and As in contaminated soil around a smelter in Hubei province, China. The stabilization rate of heavy metals in soil can exceed 99%, and the leaching amount can meet the national standard of China (GB/T 5085.3-2007, less than 5, 100, 100, 15, and 5 mg/L, respectively.) within 90 days. The study confirmed that the addition of pineconebiochar and the coexistence of indigenous microorganisms can effectively reduce the bioavailability of heavy metals. Among the heavy metals, As(III) can be oxidized to As(V) and then stabilized, and other heavy metals can be stabilized in a complex and chelated state characterized by X-ray photoelectron spectroscopy. After pineconebiochar was added, the abundance of microbial community and intensity of metabolic activities became vigorous, the types and contents of dissolved organic matter increased significantly. A novel innovation is that the addition of pinecone-biochar increased the Bacillus and Acinetobacter in soil, which enhanced the function of inorganic ion transport and metabolism to promote the passivation and stabilization of heavy metals throughout the remediation process.

作者关键词: Pinecone-biochar; Microbial communities; Functional genomics; Chemical form

地址: [Lan, Jirong; Zhang, Shanshan; Dong, Yiqie; Li, Jiahao; Li, Shiyao; Feng, Lu; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Lan, Jirong; Zhang, Shanshan; Dong, Yiqie; Li, Jiahao; Hou, Haobo] Zhaoqing Wuhan Univ, Environm Technol Res Inst, Zhaoqing 526200, Guangdong, Peoples R China.

通讯作者地址: Dong, YQ; Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址: dongyiqie@whu.edu.cn;houhb@whu.edu.cn

影响因子：10.588