Responses of bacterial communities and resistance genes on microplastics to antibiotics and heavy metals in sewage environment

被引：117
作者：
Zhao Y. [1 ]
Gao J. [1 ]
Wang Z. [1 ]
Dai H. [1 ]
Wang Y. [1 ]
机构：
[1] National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing
来源：
Journal of Hazardous Materials | 2022年 / 402卷
关键词：
Antibiotics; Bacterial communities; Heavy metals; Microplastics; Resistance genes;
D O I：
10.1016/j.jhazmat.2020.123550
中图分类号：
学科分类号：
摘要：
In present study, copper (Cu), zinc (Zn), tetracycline (TC) and ampicillin (AMP) were selected to study the individual and synergistic effects of antibiotics and heavy metals on the microbial communities and resistance genes on polyvinyl chloride microplastics (PVC MPs) and surrounding sewage after 28 and 84 days. The results indicated that PVC MPs enriched many microorganisms from surrounding sewage, especially pathogenic bacteria such as Mycobacterium and Aquabacterium. The resistance gene with the highest abundance enriched on PVC MPs was tnpA (average abundance of 1.0 × 107 copies/mL sewage). The single presence of Zn, TC and AMP inhibited these enrichments for a short period of time (28 days). But the single presence of Cu and the co-existence of antibiotics and heavy metals inhibited these enrichments for a long period of time (84 days), resulting in relatively low microbial diversities and resistance genes abundances. Transpose tnpA had significantly positive correlations (p < 0.05) with all other genes. Pathogenic bacteria Mycobacterium and Legionella were potential hosts harboring 5 and 1 resistance genes, respectively. Overall, PVC MPs played important roles in the distribution and transfer of pathogenic bacteria and resistance genes in sewage with the presence of antibiotics or (and) heavy metals. © 2020 Elsevier B.V.
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