State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2017 Jun;234:448-455. doi: 10.1016/j.biortech.2017.03.027. Epub 2017 Mar 8.
The fate and long-term effect of different metal oxide (TiO, 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.
在一个厌氧产甲烷系统中，评估了不同金属氧化物（TiO、CuO 和 ZnO）纳米颗粒（NPs）对厌氧颗粒污泥（AGS）的命运和长期影响。比较了颗粒的运行稳定性和结构特征，定量了微生物群落的代谢变化，并研究了 NPs 的命运。在长时间暴露后，CuO NPs 对 AGS 具有最大的毒性作用，而 ZnO NPs 则暂时有利于甲烷生成（不超过 5d）。由于 AGS 的独特结构和不同的毒性机制，NPs 对 AGS 的抑制作用不同。AGS 的结构变化为测试 NPs 具有不同毒性提供了新的证据。
