Aerobic granular sludge shows enhanced resistances to the long-term toxicity of Cu(II)

doi:10.1016/j.chemosphere.2020.126664

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Aerobic granular sludge shows enhanced resistances to the long-term toxicity of Cu(II)
	Jiang, Yu 1; Liu, Yang 1; Zhang, Huining 2; Yang, Kai 1; Li, Jiangyun 1; Shao, Senlin 1
刊名	Chemosphere
	2020-08-01
卷号	253
关键词	Denitrification Effluents Granular materials Heavy metals Industrial poisons Metal ions Microorganisms Nitrification Pollution Sewage Wastewater treatment Aerobic granular sludges Aromatic pollutants Denitrification efficiencies Extra-cellular polymeric substances Industrial effluent Industrial wastewaters Microbial communities Organic degradation
ISSN号	00456535
DOI	10.1016/j.chemosphere.2020.126664
英文摘要	Cu(II) is one of the most widely-existed heavy metal ions in industrial effluents. A high concentration of Cu(II) leads to strong toxic effects on microorganisms and sludge for treating industrial wastewater which often contains aromatic pollutants. Granular sludge has different characteristics compared with floc sludge, and it may exhibit unique responses to the high concentration of Cu(II). Therefore, in this study, the variations of sludge properties and pollutant removal were investigated in the aerobic granular sludge (AGS) system with 0, 5, and 10 mg L−1 of Cu(II). The results suggested that both levels of Cu(II) promoted protein secretion and bounded with extracellular polymeric substances; thus, led to more compact granules with better settleability. Cu(II) had limited impacts on the overall organic degradation and denitrification efficiency, while it exerted significant negative effect on nitrification. The average NH4+-N concentration reached 1.4 ± 0.5, 6.7 ± 3.1, and 8.4 ± 1.5 mg L−1 in the effluent when the influent contained 0, 5, and 10 mg L−1 of Cu(II), respectively. The microbial community succession showed that no reduction was observed for the total relative abundance of main groups involved in organic removal such as Pseudoxanthomonas, Acidovorax, Acinetobacter, and Thauera. However, the growth of some functional groups such as Saccharibacteria for nitrification was inhibited by the toxic effect of Cu(II). These findings suggested that AGS could resist to the long-term toxic effects of Cu(II) by multiple rationales. © 2020 Elsevier Ltd
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115227]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Wuhan University, Wuhan; 430072, China; 2.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Jiang, Yu,Liu, Yang,Zhang, Huining,et al. Aerobic granular sludge shows enhanced resistances to the long-term toxicity of Cu(II)[J]. Chemosphere,2020,253.
APA	Jiang, Yu,Liu, Yang,Zhang, Huining,Yang, Kai,Li, Jiangyun,&Shao, Senlin.(2020).Aerobic granular sludge shows enhanced resistances to the long-term toxicity of Cu(II).Chemosphere,253.
MLA	Jiang, Yu,et al."Aerobic granular sludge shows enhanced resistances to the long-term toxicity of Cu(II)".Chemosphere 253(2020).