title: Transport, fate, and long-term impacts of metal oxide nanoparticles on the stability of an anaerobic methanogenic system with anaerobic granular sludge.
abstract: The fate and long-term effect of different metal oxide (TiO2, CuO and ZnO) nanoparticles (NPs) on anaerobic granular sludge (AGS) was evaluated in an anaerobic methanogenic system. Operation stability and structural characteristics of the granules were compared, the metabolism changes in the microbial community were quantified, and NPs fate were investigated. CuO NPs had greatest toxic effect on AGS after extended exposure, whereas ZnO NPs benefited methanogenesis temporarily (no more than 5d). The inhibition on AGS caused by NPs varied due to the unique structure of AGS and different toxic mechanism. Structural changes of AGS provided new evidence that tested NPs have different toxicity.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Huiting
authors.initials: H
authors.lastname: Li
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: cuifuyi@hit.edu.cn.
authors.forename: Fuyi
authors.initials: F
authors.lastname: Cui
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Zhiquan
authors.initials: Z
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Dapeng
authors.initials: D
authors.lastname: Li
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels / Q000032:analysis; D019149:Bioreactors / Q000382:microbiology; D003300:Copper / Q000494:pharmacology*; D019605:Euryarchaeota / Q000187:drug effects* / Q000378:metabolism; D053768:Metal Nanoparticles; D008697:Methane / Q000032:analysis; D012722:Sewage / Q000382:microbiology; D014025:Titanium / Q000494:pharmacology*; D018508:Water Purification; D015034:Zinc Oxide / Q000494:pharmacology*
chemical_list: D056804:Biofuels; D012722:Sewage; C009495:titanium dioxide; D003300:Copper; D014025:Titanium; D008697:Methane; D015034:Zinc Oxide; C000520:cuprous oxide
keywords: ASBR; Anaerobic granular sludge; Long-term impacts; Metal oxide nanoparticles; Methanogenesis