The bacterial community structure in epiphytic biofilm on submerged macrophyte Potamogetom crispus L. and its contribution to heavy metal accumulation in an urban industrial area in Hangzhou

被引:18
|
作者
Geng, Nan [1 ,2 ]
Xia, Yinfeng [1 ,2 ]
Lu, Debao [1 ,2 ]
Bai, Yu [1 ,2 ]
Zhao, Yufeng [1 ,2 ]
Wang, Hui [1 ,2 ]
Ren, Lingxiao [3 ]
Xu, Cundong [1 ,2 ]
Hua, Ertian [1 ]
Sun, Guojin [1 ,2 ]
Chen, Xiaoyang [1 ,2 ]
机构
[1] Zhejiang Univ Water Resources & Elect Power, Key Lab Technol Rural Water Management Zhejiang P, Hangzhou 310018, Peoples R China
[2] Zhejiang Univ Water Resources & Elect Power, Coll Water Conservancy & Environm Engn, Hangzhou 310018, Peoples R China
[3] Nanjing Inst Technol, Sch Environm Engn, Nanjing 211167, Peoples R China
基金
中国国家自然科学基金;
关键词
Bacterial community; Heavy metal; Bioaccumulation; Adsorption; Epiphytic biofilm; BIVALVE CORBICULA-FLUMINEA; CADMIUM ACCUMULATION; MECHANISMS; DIVERSITY; SEDIMENT; LAKE;
D O I
10.1016/j.jhazmat.2022.128455
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Submerged macrophytes and their epiphytic biofilms are important media for metal transport/transformation in aquatic environment. However, the bacterial community structure and the contribution of the epiphytic biofilm to the heavy metal accumulation remain unclear. Therefore, in this study, water, sediment, submerged macrophyte (Potamogeton crispus L.) and its epiphytic biofilm samples in three sites of the moat in the industrial area of Hangzhou were collected for analyzing. The bacterial community structure was significantly impacted by the TN concentrations, and Genus Aeromonas (24.5-41.8%), Acinetobacter (16.2-29.8%) and Pseudomonas (12.6-23.6%) dominated in all epiphytic biofilm samples, which had the heavy metal pollutant resistibility. The contents of Cr in biofilms (7.4-8.3 mg/kg, DW) were significantly higher than those in leaves (1.0-2.4 mg/kg, DW), while the contents of Cu (11.0-13.9 mg/kg, DW) in leaves were significantly higher than those in biofilms (0.7-3.9 mg/kg, DW) in all the three sites. The BCF values of metals in the biofilm were followed the order of YF < IC < ETS. The results indicated that the epiphytic biofilm had positive effects on the metal bioaccumulation, and the metal accumulation ability increased with the hydrodynamic forces. Bioaccumulation by the epiphytic biofilm may be an effective way for metal (especially Cr) remediation.
引用
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页数:9
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    Geng, Nan
    Xia, Yinfeng
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    Bai, Yu
    Zhao, Yufeng
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    Ren, Lingxiao
    Xu, Cundong
    Hua, Ertian
    Sun, Guojin
    Chen, Xiaoyang
    Journal of Hazardous Materials, 2022, 430
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