Ferric-carbon micro-electrolysis and zeolite reduce CH4 and N2O emissions from the aerated constructed wetland

被引：28
|
作者：
Zhao, Zhongjing [1 ]
Hao, Qingju [1 ,2 ]
Ma, Rongzhen [1 ]
Chen, Xintong [1 ]
Xiong, Yanfang [1 ]
Hu, Jian [1 ]
Zhang, Guosheng [1 ]
Jiang, Changsheng [1 ,2 ]
机构：
[1] Southwest Univ, Coll Resources & Environm, Minist Educ, Key Lab Ecoenvironm Three Gorges Reservoir Reg, Chongqing 400715, Peoples R China
[2] Southwest Univ, State Cultivat Base Ecoagr Southwest Mt Land, Chongqing 400715, Peoples R China
来源：
JOURNAL OF CLEANER PRODUCTION | 2022年 / 342卷
基金：
中国国家自然科学基金;
关键词：
GHG; Subsurface flow constructed wetland; Ferric-carbon; Zeolite; Functional genes; WASTE-WATER TREATMENT; NITROUS-OXIDE EMISSION; ZERO-VALENT IRON; VERTICAL SUBSURFACE; COMMUNITY STRUCTURE; REMOVAL EFFICIENCY; POLLUTANT REMOVAL; METHANE EMISSIONS; NITRATE REMOVAL; SCALE;
D O I：
10.1016/j.jclepro.2022.130946
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Aeration has been widely used in constructed wetland (CWs). However, research on greenhouse gas (GHG) emissions and measures to control GHG emissions in aerated CWs is still limited. Therefore, lab-scale aerated CWs were established in this study to explore effects of Fe-C and zeolite on GHG emissions from aerated CWs. Four groups of CWs were filled with gravel (CW-A), zeolite (CW-B), ferric-carbon micro-electrolytic filler (Fe-C) and gravel (CW-C) and Fe-C and zeolite (CW-D). The results showed that compared with CW-A, the other CWs reduced CH4 emissions by 24.39%-51.22%. N2O emissions from CW-C and CW-D were on average 48.53% and 58.20% lower than those from CW-A, respectively, because Fe-C significantly changed abundance of functional genes. Overall, combined use of Fe-C and zeolite as substrate is recommended to optimize aerated CWs, which simultaneously achieved the best treatment performance and the lowest GHG emissions.
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页数：10
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