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[1]WANG Yang,AI Yanmei,CHEN Honglu,et al.Effects of Biochar on the Physical and Chemical Properties and Heavy Metal Forms of Polluted Soil in the Dump of Copper Mining Area[J].Research of Soil and Water Conservation,2023,30(02):444-450.[doi:10.13869/j.cnki.rswc.2023.02.042]

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Effects of Biochar on the Physical and Chemical Properties and Heavy Metal Forms of Polluted Soil in the Dump of Copper Mining Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 02 Page number: 444-450 Column: Public date: 2023-03-10

Title:: Effects of Biochar on the Physical and Chemical Properties and Heavy Metal Forms of Polluted Soil in the Dump of Copper Mining Area

Author(s):: WANG Yang, AI Yanmei, CHEN Honglu, ZHANG Chenyang, XU Xiaoyang, FENG Jinping, ZHOU Jihai; (Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui 241002, China)

Keywords:: environmental science; biochar; heavy metal pollution; soil physical and chemical properties; forms of heavy metals

CLC:: X53

DOI:: 10.13869/j.cnki.rswc.2023.02.042

Abstract:: In order to study the effects of different doses(0, 1%, 2%, 4%)of biochar on soil pH, organic carbon, total nitrogen, total phosphorus and heavy metal morphology under heavy metal stress, an indoor pot experiment was conducted by using the polluted soil in the dump of copper mining area. The results showed that under different doses of biochar treatment, compared with the control K, soil pH, organic carbon, total N and total P increased by 3.5%～23.0%, 5.6%～13.2%, 2.9%～6.8% and 3.4%～9.5%, respectively, and acid soluble Cd, Pb, Cu and Zn contents decreased by 65.5%～71.2%, 49.9%～71.5%, 34.6%～50.6% and 45.3%～52.1%, respectively, the reducible Cd, Pb, Cu and Zn contents decreased by 71.5%～74.3%, 44.4%～63.6%, 38.5%～57.8% and 29.1%～39.1%, respectively, the oxidizable Cd content decreased by 15.6%～36.9%, and the oxidizable Pb, Cu and Zn contents increased by 16.9%～20.5%, 3.9%～26.0% and 18.8%～55.9%, respectively, and the residual Cd, Pb, Cu and Zn contents increased of by 42.4%～44.2%, 11.0%～23.5%, 15.0%～37.9% and 20.0%～41.9%, respectively; the addition of biochar could increase soil pH, soil organic carbon and total nitrogen content, and also slightly increased but did not significantly affect soil total phosphorus content; it could also reduce acid-soluble and reducible Cd, Pb, Cu and Zn contents, decrease the oxidizable Cd content, increase the oxidizable Pb, Cu and Zn contents and the residue Cd, Pb, Cu and Zn contents. Addition of biochar can improve the physical and chemical properties of contaminated soil, significantly affect the forms of heavy metals in red soil mining areas. Biochar is an ideal conditioner for the remediation of heavy metal contaminated soil in red soil mining areas.

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Last Update: 2023-03-10