高固液比下废旧锌锰电池生物淋沥的特性及机理

牛志睿; 喻伟东; 冯美宁; 张立; 祁乙浩; 史宁; 刘强

doi:10.12030/j.cjee.201701150

环境工程学报

高固液比下废旧锌锰电池生物淋沥的特性及机理

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牛志睿, 喻伟东, 冯美宁, 张立, 祁乙浩, 史宁, 刘强. 高固液比下废旧锌锰电池生物淋沥的特性及机理[J]. 环境工程学报, 2017, 11(11): 6063-6071. doi: 10.12030/j.cjee.201701150

引用本文:

NIU Zhirui, YU Weidong, FENG Meining, ZHANG Li, QI Yihao, SHI Ning, LIU Qiang. Features and mechanism of bioleaching spent Zn-Mn batteries at high pulp density[J]. Chinese Journal of Environmental Engineering, 2017, 11(11): 6063-6071. doi: 10.12030/j.cjee.201701150

Citation:

NIU Zhirui, YU Weidong, FENG Meining, ZHANG Li, QI Yihao, SHI Ning, LIU Qiang. Features and mechanism of bioleaching spent Zn-Mn batteries at high pulp density[J]. Chinese Journal of Environmental Engineering, 2017, 11(11): 6063-6071. doi: 10.12030/j.cjee.201701150

高固液比下废旧锌锰电池生物淋沥的特性及机理

1.
延安大学石油工程与环境工程学院, 延安 716000
基金项目:
陕西省高水平大学专项资金项目（2013SXTS03）

延安市科技创新团队（2015CHTD-04）

延安大学博士科研启动项目（YDBK2017-03）

国家级大学生创新训练计划项目（201610719015）

延安大学引导项目（YDY2017-10）
中图分类号: X705

Features and mechanism of bioleaching spent Zn-Mn batteries at high pulp density

1.
School of Petroleum and Environment Engineering, Yan'an University, Yan'an 716000, China
Fund Project:

摘要: 以Acidithiobacillus thiooxidans和Leptospirillum ferriphilum为淋沥菌株探讨高固液比条件下废旧锌锰电池中锌锰浸出的影响因素、特性及淋沥机理。研究了胞外多聚物（EPS）辅助淋沥浸提的影响、不同固液比淋沥体系代谢产物组成及特征的变化；借助扫描电镜（SEM）、透射电镜（TEM）、三维荧光光谱和接触角、表面能等测试手段分析菌株、电极材料的界面行为。结果表明：生物浸提中EPS的辅助吸附和氧化作用提升了40%左右的锌锰浸提效率；淋沥体系代谢EPS总荧光区域积分标准体积（φT，n）与锌锰的溶出呈显著正相关；EPS提高材料的亲水性，促进了材料和淋沥液的润湿接触，而高固液比下EPS的缺失降低了能源底物的利用和对电池材料的接触浸提。
- 高固液比 /
- 生物浸提 /
- 废旧锌锰电池 /
- 淋沥机理
Abstract: By using Acidithiobacillus thiooxidans and Leptospirillum ferriphilum as bioleaching strains, this essay explores the influential factors, features, and mechanism of bioleaching Zn/Mn from spent Zn-Mn batteries at high pulp density. It studies the effect of bioleaching assisted by extracellular polymeric substances (EPS) and the changing of components and features of metabolites under bioleaching systems with different solid-liquid rates, and analyzes the interfacial behavior of bacterial strains and electrode materials by using testing methods such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), excitation-emission matrix spectroscopy, contact angles, surface energy and so on. The results indicate that Zn and Mn leaching rates have been increased by approximately 40% through assisted absorption and oxidation of EPS bioleaching, excitation-emission area volumes (φT,n) for EPS and dissolution of Zn and Mn are significantly and positively correlated, and that EPS could promote the hydrophilia of batteries and the wetting contact of batteries and leachates, while under high solid-liquid rate, lacking of EPS has a negative effect on the effective utilization of energy substrates and contacting and bioleaching of batteries.
- high pulp density /
- bioleaching /
- spent Zn and Mn batteries /
- mechanism exploration

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高固液比下废旧锌锰电池生物淋沥的特性及机理

1. 延安大学石油工程与环境工程学院, 延安 716000

收稿日期: 2017-04-17

基金项目:

陕西省高水平大学专项资金项目（2013SXTS03）

延安市科技创新团队（2015CHTD-04）

延安大学博士科研启动项目（YDBK2017-03）

国家级大学生创新训练计划项目（201610719015）

延安大学引导项目（YDY2017-10）

关键词:

摘要: 以Acidithiobacillus thiooxidans和Leptospirillum ferriphilum为淋沥菌株探讨高固液比条件下废旧锌锰电池中锌锰浸出的影响因素、特性及淋沥机理。研究了胞外多聚物（EPS）辅助淋沥浸提的影响、不同固液比淋沥体系代谢产物组成及特征的变化；借助扫描电镜（SEM）、透射电镜（TEM）、三维荧光光谱和接触角、表面能等测试手段分析菌株、电极材料的界面行为。结果表明：生物浸提中EPS的辅助吸附和氧化作用提升了40%左右的锌锰浸提效率；淋沥体系代谢EPS总荧光区域积分标准体积（φT，n）与锌锰的溶出呈显著正相关；EPS提高材料的亲水性，促进了材料和淋沥液的润湿接触，而高固液比下EPS的缺失降低了能源底物的利用和对电池材料的接触浸提。

English Abstract

Features and mechanism of bioleaching spent Zn-Mn batteries at high pulp density

1. School of Petroleum and Environment Engineering, Yan'an University, Yan'an 716000, China

Received Date: 2017-04-17

Fund Project:

Keywords:

Abstract: By using Acidithiobacillus thiooxidans and Leptospirillum ferriphilum as bioleaching strains, this essay explores the influential factors, features, and mechanism of bioleaching Zn/Mn from spent Zn-Mn batteries at high pulp density. It studies the effect of bioleaching assisted by extracellular polymeric substances (EPS) and the changing of components and features of metabolites under bioleaching systems with different solid-liquid rates, and analyzes the interfacial behavior of bacterial strains and electrode materials by using testing methods such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), excitation-emission matrix spectroscopy, contact angles, surface energy and so on. The results indicate that Zn and Mn leaching rates have been increased by approximately 40% through assisted absorption and oxidation of EPS bioleaching, excitation-emission area volumes (φT,n) for EPS and dissolution of Zn and Mn are significantly and positively correlated, and that EPS could promote the hydrophilia of batteries and the wetting contact of batteries and leachates, while under high solid-liquid rate, lacking of EPS has a negative effect on the effective utilization of energy substrates and contacting and bioleaching of batteries.

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高固液比下废旧锌锰电池生物淋沥的特性及机理

Features and mechanism of bioleaching spent Zn-Mn batteries at high pulp density

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高固液比下废旧锌锰电池生物淋沥的特性及机理

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Features and mechanism of bioleaching spent Zn-Mn batteries at high pulp density

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