Effects of biochar layer position on treatment performance and microbial community in subsurface flow constructed wetlands for removal of cadmium and lead

被引：18

作者：

Sha, Haichao ^{[1
]}

Song, Xin ^{[1
]}

Al-Dhabi, Naif Abdullah ^{[2
]}

Zeng, Taotao ^{[1
]}

Mao, Yuemei ^{[1
]}

Fu, Yusong ^{[1
]}

Liu, Zheng ^{[1
]}

Wang, Guohua ^{[1
]}

Tang, Wangwang ^{[3
,4
]}

机构：

[1] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reus, Hengyang 421001, Hunan, Peoples R China

[2] King Saud Univ, Coll Sci, Dept Bot & Microbiol, POB 2455, Riyadh 11451, Saudi Arabia

[3] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China

[4] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2024年 / 394卷

基金：

中国国家自然科学基金;

关键词：

Constructed wetland; Biochar; Soil; Microbial community; Heavy metal; HEAVY-METALS; ZINC;

D O I：

10.1016/j.biortech.2023.130194

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Levels of cadmium (Cd) and lead (Pb) correspond to common composition in acid mine wastewater of Hunan Province of China. The removal path of Cd and Pb and the structure of microbial community were investigated by developing constructed wetlands (CWs) with different layer positions of biochar. The biochar as a layer at the bottom of CW (BCW) system exhibited maximum Cd and Pb removal efficiencies of 96.6-98.6% and 97.2-98.9%, respectively. Compared with original soil, BCW increased the relative proportions of Proteobacteria, Firmicutes, Acidobacteriota, Verrucomicrobiota, Desulfobacterota, Armatimonadota, Bacteroidota, Patescibacteria, Basidiomycota (phylum level) and Burkholderia-Caballeronia-Paraburkholderia, Citrifermentans, Chthonomonadales, Cellulomonas, Geothrix, Terracidiphilus, Gallionellaceae, Microbacterium, Vanrija, Apiotrichum, Saitozyma, Fusarium (genus level). The concentrations of Cd and Pb were positively correlated with the abundance of Verrucomicrobiota, Basidiomycota (phylum level), and Methylacidiphilaceae, Meyerozyma, Vanrija (genus level). This study demonstrates that BCW system can improve removal performance toward Cd and Pb, as well as alter microbial community.

引用

页数：9

共 42 条

[1] Hydraulic retention time and pH affect the performance and microbial communities of passive bioreactors for treatment of acid mine drainage [J].