Removal efficacy of fly ash composite filler on tailwater nitrogen and phosphorus and its application in constructed wetlands

被引：3

作者：

Wang, Shuhang ^{[1
,2
,3
]}

Yang, Haoran ^{[2
]}

Che, Feifei ^{[3
]}

Huang, Wei ^{[2
,3
]}

Yang, Dianhai ^{[1
]}

机构：

[1] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai, Peoples R China

[2] Donghua Univ, Coll Environm Sci & Engn, State Environm Protect Engn Ctr Pollut Treatment &, Shanghai, Peoples R China

[3] Chinese Res Inst Environm Sci, Inst Lake Environm & Ecol, Natl Engn Lab Lake Pollut Control & Ecol Restorat, Beijing, Peoples R China

来源：

FRONTIERS IN CHEMISTRY | 2023年 / 11卷

关键词：

tailwater; filler; nitrogen removal; phosphorus removal; constructed wetlands; WASTE-WATER TREATMENT; NUTRIENT REMOVAL; PERFORMANCE; INTERFACE; SUBSTRATE; FLUORIDE; SORPTION; LAKE;

D O I：

10.3389/fchem.2023.1160489

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Constructed wetlands (CWs) have been widely used in tailwater treatment. However, it is difficult to achieve considerable removal efficiency of nitrogen and phosphorus in tailwater solely by CWs-an efficient green wetland filler is also important. This study investigated 160 domestic sewage treatment facilities (DSTFs) in rural areas from two urban areas in Jiaxing for TP and NH3-N and found that TP and NH3-N concentrations in rural domestic sewage (RDS) in this plain river network are still high. Therefore, we selected a new synthetic filler (FA-SFe) to enhance nitrogen and phosphorus reduction, and we discuss the importance of filler in constructed wetlands. Experiments revealed the adsorption capacity of the new filler: the maximum adsorption amounts of TP and NH3-N reached 0.47 g m(-2) d(-1) and 0.91 g m(-2) d(-1), respectively. The application potential of FA-SFe was verified in actual wastewater treatment, with the removal rates of ammonia nitrogen and TP reaching 71.3% and 62.7%, respectively. This study provides a promising pathway for nitrogen and phosphorus removal from rural tailwaters.

引用

页数：9

共 37 条

[21] Mesoporous, phase-pure Al3+ engrafted spinel ZnAlxB2-xO4 x = 0, 1; B = Cr3+/Fe3+) for effective fluoride chemisorption and photodegradation of azo/non-azo dyes [J].