Monitoring the nitrous oxide emissions and biological nutrient removal from wastewater treatment: Impact of per fl uorooctanoic acid

doi:10.1016/j.jhazmat.2020.123469

	Monitoring the nitrous oxide emissions and biological nutrient removal from wastewater treatment: Impact of per fl uorooctanoic acid
	Chen, Hongbo 1; Zou, Mei 1; Zhou, Yaoyu 2; Zeng, Long 1; Yang, Xiao 3
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2021-01-15
卷号	402 页码:12
关键词	Perfluoroalkyl and polyfluoroalkyl substances Perfluorooctanoic acid Biological nutrient removal Nitrous oxide emissions Extracellular polymeric substances
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2020.123469
通讯作者	Yang, Xiao(knuyx0309@gmail.com)
英文摘要	The impacts of perfluorooctanoic acid (PFOA) on biological nutrient removal and nitrous oxide (N2O) emissions have been specifically studied. The experimental results show that PFOA inhibited nitrification, but promoted denitrification and reduced N2O emissions without significantly affecting phosphorus removal. The existence of 20 mg/L of PFOA increased total nitrogen removal efficiency from 78.7 +/- 6.89 % to 86.8 +/- 6.39 % and reduced N2O emission factor from 6.02 +/- 0.24 % to 4.43 +/- 0.10 %. The mechanism studies reveal that microorganisms released extracellular polymeric substances (EPS) under PFOA exposure to protect sludge cells against PFOA toxicity. The generated PFOA-EPS conjugates reduced the nitrification rate, but increased the denitrification rate by regulating the activity of oxidoreductases. In addition, PFOA reduced the activity of polyphosphate accu-mulating organisms and glycogen accumulating organisms to save carbon source for denitrification, which reduced the electronic competition between reductases, thereby achieving complete denitrification and N2O mitigation. The promotion of PFOA for denitrification and N2O mitigation can gain a more comprehensive cognition of the role of PFOA in wastewater treatment. The release mechanism of EPS can afford new insights for the development of effective methods to enhance nitrogen removal and reduce N2O emissions.
资助项目	National Natural Science Foundation of China[51608464] ; Natural Science Foundation of Hunan Province[2020JJ4576]
WOS关键词	EXTRACELLULAR POLYMERIC SUBSTANCES ; SEQUENCING BATCH REACTOR ; PHOSPHORUS REMOVAL ; PERFLUOROOCTANOIC ACID ; ACTIVATED-SLUDGE ; N2O EMISSIONS ; DENITRIFICATION ; METABOLISM ; PFOA ; SULFAMETHAZINE
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000593837900014
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Hunan Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/137029]
专题	中国科学院地理科学与资源研究所
通讯作者	Yang, Xiao
作者单位	1.Xiangtan Univ, Coll Environm & Resources, Xiangtan 411105, Peoples R China 2.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China 3.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Chen, Hongbo,Zou, Mei,Zhou, Yaoyu,et al. Monitoring the nitrous oxide emissions and biological nutrient removal from wastewater treatment: Impact of per fl uorooctanoic acid[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,402:12.
APA	Chen, Hongbo,Zou, Mei,Zhou, Yaoyu,Zeng, Long,&Yang, Xiao.(2021).Monitoring the nitrous oxide emissions and biological nutrient removal from wastewater treatment: Impact of per fl uorooctanoic acid.JOURNAL OF HAZARDOUS MATERIALS,402,12.
MLA	Chen, Hongbo,et al."Monitoring the nitrous oxide emissions and biological nutrient removal from wastewater treatment: Impact of per fl uorooctanoic acid".JOURNAL OF HAZARDOUS MATERIALS 402(2021):12.