标题: Bioremediation of cadmium-trichlorfon co-contaminated soil by Indian mustard (Brassica juncea) associated with the trichlorfon-degrading microbe Aspergillus sydowii: Related physiological responses and soil enzyme activities
作者: Zhang, C (Zhang, Chao); Tao, Y (Tao, Yue); Li, SX (Li, Shuangxi); Ke, T (Ke, Tan); Wang, PP (Wang, Panpan); Wei, SJ (Wei, Sijie); Chen, LZ (Chen, Lanzhou)
来源出版物: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 卷: 188 文献号: 109756 DOI: 10.1016/j.ecoenv.2019.109756 出版年: JAN 30 2020
摘要: Soil co-contaminated with heavy metals and organics is often difficult to remediate. In this study, pot experiments were conducted to investigate the concurrent removal of cadmium (Cd, two levels: Cd-L [10 mg kg(-1)] and Cd-H [50 mg kg(-1])) and trichlorfon (TCF, 100 mg kg(-1)) from co-contaminated soil by comparing the following remediation methods: natural remediation (NR), soil inoculated with Aspergillus sydowii (AS), soil planted with Brassica juncea (BJ), and soil planted with B. juncea and inoculated with A. sydowii (BJ-AS). The physiological responses of B. juncea and soil enzyme activities after remediation were also studied. B. juncea grew well in co-contaminated soil at both Cd levels. The biomass and chlorophyll content of B. juncea in Cd-H soil were lower than those in Cd-L soil, whereas the malondialdehyde content and activities of catalase, peroxidase and superoxide dismutase of B. juncea in Cd-H soil were higher than those in Cd-L soil. Cd accumulation in B. juncea was high in Cd-H soil, whereas high Cd removal efficiency was observed in Cd-L soil. TCF could be thoroughly degraded within 35 days in NR at both Cd-level soils. AS, BJ and BJ-AS promoted TCF degradation and enhanced the activities of catalase, urease, sucrase and alkaline phosphatase in soil compared with the NR. BJ-AS showed the highest phytoextraction ratio (3.32% in Cd-L and 1.34% in Cd-H soil) and TCF degradation rate (half-life of 2.18 and 2.37 days in Cd-L and Cd-H soil, respectively). These results demonstrate that BJ-AS could effectively remove Cd and TCF from soil and is thus a feasible technology for the bioremediation of these co-contaminated soil.
PubMed ID: 31711776
作者关键词: Soil; Cd-TCF co-contamination; Bioremediation; Brassica juncea; Aspergillus sydowii
地址: [Zhang, Chao; Tao, Yue; Li, Shuangxi; Ke, Tan; Wang, Panpan; Wei, Sijie; Chen, Lanzhou] Wuhan Univ, Hubei Res Ctr Environm Remediat Technol, Coll Resource & Environm Sci, Hubei Key Lab Biomass Resources Chem & Environm B, Wuhan 430079, Hubei, Peoples R China.
通讯作者地址: Chen, LZ (通讯作者)，Wuhan Univ, Coll Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.
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