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.

引用

页数：10

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