原位
碳纤维
产甲烷菌
化学
金属
腐植酸
环境化学
水溶液中的金属离子
核化学
材料科学
甲烷
有机化学
肥料
复合数
复合材料
作者
Qiang Liu,Yuanting Xu,Yeqing Li,Chengjie Ma,Shuo Chen,Lu Feng,Quan Xu,Junting Pan,Bo Peng,Hongjun Zhou,Xu Chen
标识
DOI:10.1016/j.jclepro.2023.138258
摘要
Monophenols form humic acids (HA) through polycondensation reaction in the anaerobic digestion (AD) process, which will inhibit AD process. Currently, metal ions are the option for in-situ relieving HA inhibition during AD, but excess metal ions are harmful to microorganisms. In this study, carbon quantum dots (CQDs, a non-metallic materials) were proposed to relieve HA inhibition in-situ. We investigated the effect of HA on AD acidification and methanation stage, and synthesized CQDs using sodium citrate (s-CQDs) and p-phenylenediamine (p-CQDs) as precursors to relieve the HA inhibition in-situ. Results showed that s-CQDs (3.0 g/L) significantly increased the cumulative CH4 yield from AD of ethanol with 1.0 g/L HA (1.9 times higher than that without s-CQDs). Microbiological analysis indicated the most dominant methanogen was Methanosarcinaceae, with richness of 89.7%. Compared to the HA inhibition system, the relative abundance of Methanosarcinaceae increased by 87.5%. The analysis of interaction mechanism between CQDs and HA indicated that s-CQDs has an in-situ binding effect to HA by reacting with -OH, CC, and -COOH. This study provided a novel means for in-situ relieving HA inhibition, and illustrated the interaction mechanism between CQDs and HA, which will guide the application in production of bioenergy.
科研通智能强力驱动
Strongly Powered by AbleSci AI