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腐殖酸对以水钠锰矿为基质的人工湿地去除菲的影响。

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

作者信息

Shen Xiaotong, Zhang Jian, Xie Huijun, Liang Shuang, Ngo Huu Hao, Guo Wenshan

机构信息

Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences Jinan Shandong 250117 China.

College of Safety and Environmental Engineering, Shandong University of Science and Technology Qingdao 266590 China

出版信息

RSC Adv. 2022 May 18;12(24):15231-15239. doi: 10.1039/d1ra06927f. eCollection 2022 May 17.

DOI:10.1039/d1ra06927f
PMID:35702428
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9115771/
Abstract

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.

摘要

多环芳烃（PAHs）与腐殖酸（HA）的结合可以促进络合絮凝过程，并通过HA作为电子穿梭体的作用促进污染物氧化。添加了HA包覆生物炭（BA）以研究HA对以水钠锰矿为基质的人工湿地（CWs）去除菲（PHE）的影响。基于傅里叶变换红外光谱分析，由于HA作为络合剂的作用，其使出水的平均PHE浓度降低了26.58%。对于有水钠锰矿的人工湿地，由于电子穿梭体的作用，PHE去除性能进一步提高。X射线光电子能谱和Illumina高通量分析显示锰铁循环增强。垂直流人工湿地-HA/BA中锰氧化细菌和铁氧化细菌的总相对比例分别是垂直流人工湿地-BA和垂直流人工湿地-HA/BA中的2.33倍和5.50倍。腐殖酸还加速了PAHs的生物降解，垂直流人工湿地-HA/BA中PAH降解细菌的数量比垂直流人工湿地-BA中的多6.29倍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/78f5/9115771/7ce35eb51c88/d1ra06927f-f7.jpg
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