Efficient removal of heavy metals by synergistic actions of microorganisms and waste molasses

被引：36
|
作者：
Sun, Yan [1 ,2 ]
Lan, Jirong [1 ,2 ]
Du, Yaguang [2 ]
Li, Zhuang [2 ]
Liao, Xi [2 ]
Du, Dongyun [1 ,2 ]
Ye, Hengpeng [1 ,2 ]
Zhang, Tian C. [3 ]
Chen, Shaohua [1 ,2 ]
机构：
[1] Minist Educ, Key Lab Catalysis Convers & Energy Mat Chem, Wuhan, Peoples R China
[2] South Cent Univ Nationalities, Coll Resources & Environm Sci, Engn Res Ctr Heavy Met Pollut Control Hubei Prov, Wuhan 430074, Peoples R China
[3] Univ Nebraska Lincoln, Coll Engn, Civil & Environm Engn Dept, Omaha, NE 68182 USA
来源：
BIORESOURCE TECHNOLOGY | 2020年 / 302卷
基金：
中国国家自然科学基金;
关键词：
Heavy metal; Microorganism; Waste molasses; Biological removal; SULFATE-REDUCING BACTERIA; HEXAVALENT CHROMIUM; ORGANIC-MATTER; BIOSORPTION; WATER; ADSORPTION; MECHANISM; CR(VI); BIOACCUMULATION; DEGRADATION;
D O I：
10.1016/j.biortech.2020.122797
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, two bacteria strains (Enterobacter sp. SL and Acinetobacter sp. SL-1) and waste molasses (carbon source) were used to remove Zn(II), Cd(II), Cr(VI), and Cr(Total) in the liquid solution (87 mg center dot L). The results showed the removal efficiencies of Cr(Total) and Cr(VI) could reach over 98.00% after reaction, and the removal efficiencies of Zn(II) and Cd(II) were all about 90.00% by the synergistic actions of microorganisms and waste molasses. In this process, waste molasses provides nutrients for microorganisms and has the characteristics and capability of Cr, Zn, and Cd. Microorganisms mainly use biological adsorption (36.95% and 45.69%) and metabolism (24.37% and 17.05% by producing humic-acid and fulvic-acid like substances) to remove Zn(II) and Cd (II), while waste molasses could to remove Cr(Total) (81.24%) and Cr(VI) (75.90%). This study has potential application value for the treatment of wastewater containing high concentrations of heavy metals.
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页数：9
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