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Effect evaluation of microplastics on activated sludge nitrification and denitrification
Li, Lu1; Song, Kang1; Yeerken, Senbati1; Geng, Shixiong1,2; Liu, Dan1,3; Dai, Zhili1,2; Xie, Fazhi2; Zhou, Xiaohong3; Wang, Qilin4
2020-03-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume707Issue:1Pages:6
Abstract

A large amount of microplastics have entered conventional wastewater treatment plants, and their effects on activated sludge nitrification and denitrification are rarely reported. This study investigated the effects of microplastics on activated sludge nitrification and denitrification using five typical microplastics, namely, polyvinyl chloride (PVC), polypropylene, polyethylene, polystyrene, and polyester (PES) with concentrations of 0, 1000, 5000, and 10,000 particles/L. Results indicated that microplastics had negative effects on ammonia oxidation rate and low effect on nitrite oxidation rate during nitrification. The total inorganic nitrogen did not have much difference during 3 h nitrification under all the tested conditions. The addition of microplastics showed positive effects on denitrification, especially for PVC and PES at microplastic concentration of 5000 particles/L. Nitrification and denitrification did not evidently stop under all the tested conditions, indicating that the selected microplastic types and concentrations were not toxic to nitrification and denitrification within 3 h. The high abundance of PVC microplastics remarkably increased the nitrous oxide (N2O) emission during denitrification. The N2O emission in the test with 10,000 particle/L of PVC was 4.6times higher than the blank control. This study indicated that microplastics with <10,000 particle/L concentration in wastewater had low effects on nitrification and denitrification, whereas they had high effects on the N2O emission during denitrification. (C) 2019 Elsevier B.V. All rights reserved.

KeywordMicroplastic Nitrification Denitrification N2O emission Activated sludge
DOI10.1016/j.scitotenv.2019.135953
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000507925700048
WOS KeywordWASTE-WATER TREATMENT ; OXIDE N2O EMISSIONS ; NITROGEN REMOVAL ; TREATMENT PLANTS ; DYNAMICS ; FATE
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/35184
Collection水环境工程研究中心_期刊论文
Corresponding AuthorSong, Kang
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Anhui Jianzhu Univ, Sch Mat Sci & Chem Engn, Hefei 230022, Peoples R China
3.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China
4.Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Ultimo, NSW 2007, Australia
Recommended Citation
GB/T 7714
Li, Lu,Song, Kang,Yeerken, Senbati,et al. Effect evaluation of microplastics on activated sludge nitrification and denitrification[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,707(1):6.
APA Li, Lu.,Song, Kang.,Yeerken, Senbati.,Geng, Shixiong.,Liu, Dan.,...&Wang, Qilin.(2020).Effect evaluation of microplastics on activated sludge nitrification and denitrification.SCIENCE OF THE TOTAL ENVIRONMENT,707(1),6.
MLA Li, Lu,et al."Effect evaluation of microplastics on activated sludge nitrification and denitrification".SCIENCE OF THE TOTAL ENVIRONMENT 707.1(2020):6.
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