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论文类型：期刊论文

发表时间：2020-02-01

发表刊物：BIORESOURCE TECHNOLOGY

收录刊物：PubMed、EI、SCIE

卷号：297

页面范围：122382

ISSN号：0960-8524

关键字：Anaerobic digestion; Antagonistic; Inhibition; ZnO NPs; Surfactant

摘要：The objective of this study was to evaluate the antagonistic effect of emerging pollutants of zinc oxide nano-particles (ZnO NPs) and sodium dodecyl sulfate (SDS) on anaerobic digestion and explore their potential mechanism. The results indicated that at a low inhibitory concentration of ZnO NPs (1.0 mM), the practical co-inhibition was decreased by 24% and 18% in co-existence of 50 mg/L SDS and 300 mg/L SDS, respectively. More importantly, the co-existence of 300 mg/L SDS greatly enhanced methanogenesis of organics in seriously inhibited case (2.0 mM of ZnO NPs). The microbial community analysis showed that co-existed SDS enhanced the growth of Methanothrix, Methanosarcina and Methanobacterium. The antagonistic enhancement could be attributed to the net charge reversal, partially agglomeration of ZnO NPs and/or reduction of Zn2+ release in the presence of SDS. These findings could provide useful information for evaluating the co-inhibition of SDS and ZnO NPs on biological processes.