Microplastics into vermi-wetland lower the treatment performance of organic substances and antibiotic resistance genes in excess sludge

Xia，Hui1; Yang，Jing1; Huang，Kui1,2; Nie，Cailong1,3

2023-06-01

10.1016/j.jece.2023.109946

Journal of Environmental Chemical Engineering   影响因子和分区

2213-2929

2213-3437

This study aimed to investigate the effects of MPs on the decomposition of excess sludge and reduction of antibiotic resistance genes (ARGs) in a vermi-wetland. For this, the polymethyl methacrylate (PMMA) MPs added into excess sludge were treated by a vermi-wetland inoculated by earthworms Eisenia fetida and wetland plant Acorus calamus. The results showed that the growth rates of plants and earthworms were significantly inhibited in the vermi-wetland added with MPs. The average removal rates of chemical oxygen demand and total solids for excess sludge in vermi-wetland added MPs decreased by 15.36% and 38.00%, respectively, compared to the control without adding MPs. Moreover, the abundance of 16 S rDNA and 18 S rDNA inside vermi-wetland with MPs enriched by 53.61% and 75%, respectively. In addition, the median removal rate of selected ARGs in sludge declined by 15.75%−34.27% in the MPs added vermi-wetland. Compared to the control, the MPs enhanced the mobile genetic elements of intI 1 and tnpa-04 abundance inside the vermi-wetland by 44.79% and 53.33%, respectively, which were separately attached on the MPs surface at 25.62 ng/g and 7.26 ng/g. This study suggests that the addition of MPs into vermi-wetland reduced the removal efficiency of organic substances and ARGs in the excess sludge.

Earthworms Mobile genetic elements Sludge treatment Vermi-filter Vermicomposting Wetland

SCI ; EI

英语

其他

National Natural Science Foundation of China[51868036];National Natural Science Foundation of China[52000095];

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:001042759600001

ELSEVIER SCI LTD

20231714018752

Antibiotics ; Chemical oxygen demand ; Genes ; Polymethyl methacrylates

Biological Materials and Tissue Engineering:461.2 ; Medicine and Pharmacology:461.6 ; Organic Polymers:815.1.1

2-s2.0-85153489443

Scopus

1.School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou,730070,China
2.Key Laboratory of Yellow River Water Environment in Gansu Province,Lanzhou,730070,China
3.School of Environmental Science and Engineering,College of Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Xia，Hui,Yang，Jing,Huang，Kui,et al. Microplastics into vermi-wetland lower the treatment performance of organic substances and antibiotic resistance genes in excess sludge[J]. Journal of Environmental Chemical Engineering,2023,11(3).

Xia，Hui,Yang，Jing,Huang，Kui,&Nie，Cailong.(2023).Microplastics into vermi-wetland lower the treatment performance of organic substances and antibiotic resistance genes in excess sludge.Journal of Environmental Chemical Engineering,11(3).

Xia，Hui,et al."Microplastics into vermi-wetland lower the treatment performance of organic substances and antibiotic resistance genes in excess sludge".Journal of Environmental Chemical Engineering 11.3(2023).