Electrolysis-enhanced ecological floating bed and its factors influencing nitrogen and phosphorus removal in simulated hyper-eutrophic water

被引：6

作者：

Yan, Cheng ^{[1
]}

Ma, Tangming ^{[1
]}

Wang, Mingxuan ^{[1
]}

Yang, Shunqing ^{[1
]}

Yang, Liuyan ^{[1
]}

Gao, Yan ^{[1
]}

机构：

[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2021年 / 28卷 / 18期

基金：

中国国家自然科学基金;

关键词：

Ecological floating bed (EFB); Electrolysis-enhanced ecological floating bed (EEEFB); Ammonia nitrogen removal; Phosphate removal; WASTE-WATER; PHOSPHATE REMOVAL; AMMONIA; RECOVERY; GROWTH; CRYSTALLIZATION; METABOLISM; ALUMINUM; NITRATE; PLANT;

D O I：

10.1007/s11356-020-12261-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To enhance ammonia nitrogen (NH3-N) and phosphate (PO43--P) removal in hyper-eutrophic water, electrolysis-enhanced ecological floating bed (EEEFB) was designed with a Mg-Al alloy anode, a Ir-Ta-Ti metal oxide-coated titanium anode, and an Fe anode with the same graphite cathode. The results showed that the Mg-Al alloy anode with graphite cathode had a better ability to enhance NH3-N and PO43--P removal. When the current density was 0.37 mA.cm(-2), the electrolysis time was 24 h/d, and the net removal rates of NH3-N and PO43--P were 62% and 99.4%, respectively. In winter, the purification efficiencies of NH3-N and PO43--P were as high as 7388.4 mg.m(-2) and 4297.5 mg.m(-2), respectively, by EEEFBs which were significantly higher than the traditional ecological floating bed (p < 0.05). Scanning electron microscopy (SEM) and X-ray spectrometry confirmed that the PO43--P was deposited in the sediment of EEEFBs with Mg-Al alloy anode and Fe anode.

引用

页码：22832 / 22842

页数：11

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