Effect of humic acid on phenanthrene removal by constructed wetlands using birnessite as a substrate

被引：9
作者：
Shen, Xiaotong [1 ]
Zhang, Jian [2 ,3 ]
Xie, Huijun [4 ]
Liang, Shuang [3 ]
Ngo, Huu Hao [5 ]
Guo, Wenshan [5 ]
机构：
[1] Shandong First Med Univ & Shandong Acad Med Sci, Med Sci & Technol Innovat Ctr, Jinan 250117, Shandong, Peoples R China
[2] Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Peoples R China
[3] Shandong Univ, Sch Environm Sci & Engn, Shandong Key Lab Water Pollut Control & Resource, Qingdao 266237, Peoples R China
[4] Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China
[5] Univ Technol Sydney, Sch Civil & Environm Engn, Broadway, NSW 2007, Australia
来源：
RSC ADVANCES | 2022年 / 12卷 / 24期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
POLYCYCLIC AROMATIC-HYDROCARBONS; DISSOLVED ORGANIC-MATTER; FLUORESCENCE SPECTROSCOPY; MANGANESE-DIOXIDE; WASTE-WATER; OXIDATION; SORPTION; BIODEGRADATION; DEGRADATION; ADSORPTION;
D O I：
10.1039/d1ra06927f
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The binding of polycyclic aromatic hydrocarbons (PAHs) to humic acid (HA) can boost the complexation-flocculation process and promote pollutant oxidation through the role of HA as an electron shuttle. HA-coated biochar (BA) was added to study the effects of HA on phenanthrene (PHE) removal by constructed wetlands (CWs) using birnessite as a substrate. HA reduced the average PHE concentration of effluent by 26.58% due to its role as a complexing agent, based on Fourier-transform infrared spectroscopy analysis. For CWs with birnessite, the PHE removal performance was further enhanced due to the role of electron shuttles. X-ray photoelectron spectroscopy and illumina high-throughput analysis revealed an enhanced Mn-Fe cycle. The total relative proportions of Mn-oxidizing bacteria and iron-oxidizing bacteria in VFBCW-HA/BA were 2.33 and 5.50 times as high as those in VFBCW-BA and VFCW-HA/BA. Humic acid also accelerated the biodegradation of PAHs and the quantity of PAH degradative bacteria in VFBCW-HA/BA was 6.29 times greater than in VFBCW-BA.
引用
收藏
页码：15231 / 15239
页数：9
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