Synergetic effects of biochars and denitrifier on nitrate removal

被引：42
作者：
Liu, Yuqi [1 ]
Liu, Shulei [1 ]
Yang, Zongcai [1 ]
Xiao, Lin [1 ]
机构：
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Xianlin Campus, Nanjing 210023, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2021年 / 335卷
关键词：
Biochar; Denitrifier; Immobilization; Nitrate removal; Synergetic effect; ELECTRON-TRANSFER; MICROBIAL DENITRIFICATION; CONTAMINATED SOIL; SULFAMETHOXAZOLE; BIOREMEDIATION; TEMPERATURE; PERSULFATE; ADSORPTION; PYROLYSIS; TRANSPORT;
D O I：
10.1016/j.biortech.2021.125245
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Nitrate is one of the most common water contaminants and has caused severe environmental problems. This work aimed to investigate the effects of integration of denitrifier with biochars on nitrate removal and understand the underlying mechanisms. The results showed that physiochemical properties of biochars varied according to different feedstocks, which influenced bacteria attachment and nitrate removal through adsorption. However, bacteria could colonize on biochars no matter biochars surface were favorable for bacteria attachment or not. Immobilization of denitrifier on biochars significantly improved nitrate removal efficiencies and reduced lag time. Underlying mechanisms investigation showed that the integration of denitrifier with biochars had synergetic effects on promoting nitrate removal, which improved not only the expression and activity of nitrate reductase, but also the electron transport system activity.
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页数：8
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