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

• Published in: Journal of hazardous materials 2022-05, Vol.430, p.128455-128455, Article 128455
• Main Authors: Geng, Nan, Xia, Yinfeng, Lu, Debao, Bai, Yu, Zhao, Yufeng, Wang, Hui, Ren, Lingxiao, Xu, Cundong, Hua, Ertian, Sun, Guojin, Chen, Xiaoyang
• Format: Article
• Language: English
• Subjects: Adsorption; Bacterial community; Bioaccumulation; Epiphytic biofilm; Heavy metal
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2022.128455

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