Enhanced nitrate removal in an Fe-0-driven autotrophic denitrification system using hydrogen-rich water

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院环境生物技术重点实验室

	Enhanced nitrate removal in an Fe-0-driven autotrophic denitrification system using hydrogen-rich water
	Zhu, Tingting ; Cai, Weiwei ; Wang, Bo ; Liu, Wenzong ; Feng, Kai ; Deng, Ye ; Wang, Aijie
刊名	ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
	2019-08-01
卷号	5 期号:8 页码:1380-1388
ISSN号	2053-1400
英文摘要	Autotrophic denitrification can be driven using zero valent iron (ZVI) as an electron donor. Balancing the competitive reactions of abiotic nitrate removal and biotic nitrate removal by H-2 is the key problem for iron-assisted autotrophic denitrification. Hence, H-2 production by ZVI corrosion plays an important role in the iron-assisted nitrate reduction process, which determines the nitrate reduction rate and the end product. However, few studies concentrate on the effect of soluble H-2 on ZVI corrosion and the performance of iron-assisted autotrophic denitrification. A hydrogen-rich solution is obtained by dual-chamber MFCs, which is usually directly discarded. The present study aimed to demonstrate that the dissolved hydrogen can be feasibly applied in iron-assisted autotrophic denitrification to accelerate nitrate reduction during ZVI corrosion. It was observed that a continuous dissolved hydrogen supply via electrolysis promoted and stabilized the performance of iron-assisted autotrophic denitrification. The average nitrate removal was 47.3% +/- 0.2% in ZVI reactors with dissolved hydrogen-rich water (DH reactors), and 30.2% +/- 0.3% in ZVI reactors without dissolved hydrogen-rich water (control reactors). Moreover, the concentration of nitrite was 0.04 mg L-1 in the DH reactors compared with 0.50 mg L-1 in the control reactors. No other intermediates (e.g. N2O) were found in both the autotrophic denitrification reactors. Finally, the hydrogen-rich water enriched the denitrifying bacteria and increased the abundance of specific functional genes, resulting in the promotion of hydrophobic denitrification during the iron-assisted nitrate removal.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43364]
专题	生态环境研究中心_中国科学院环境生物技术重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China 2.Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Tingting,Cai, Weiwei,Wang, Bo,et al. Enhanced nitrate removal in an Fe-0-driven autotrophic denitrification system using hydrogen-rich water[J]. ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY,2019,5(8):1380-1388.
APA	Zhu, Tingting.,Cai, Weiwei.,Wang, Bo.,Liu, Wenzong.,Feng, Kai.,...&Wang, Aijie.(2019).Enhanced nitrate removal in an Fe-0-driven autotrophic denitrification system using hydrogen-rich water.ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY,5(8),1380-1388.
MLA	Zhu, Tingting,et al."Enhanced nitrate removal in an Fe-0-driven autotrophic denitrification system using hydrogen-rich water".ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY 5.8(2019):1380-1388.