首页|Treatment of wastewater containing thallium(Ⅰ) by long-term operated manganese sand filter: Synergistic action of MnOx and MnOM

Treatment of wastewater containing thallium(Ⅰ) by long-term operated manganese sand filter: Synergistic action of MnOx and MnOM

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  • NETL
  • NSTL
  • Elsevier
The long-term and stable removal of thallium (Tl) from industrial wastewater generated by mining and smeltingoperations remains challenging. While sand filters are commonly applied for the simultaneous removal of Mn(Ⅱ)and other heavy metals, they have limited efficacy in treating Tl-contaminated wastewater. To address this gap,we operated a lab-scale Mn sand filter (MF) without added microorganisms to investigate the efficiency andmechanisms of Mn(Ⅱ) and Tl(Ⅰ) removal. Trends in effluent Mn(Ⅱ) and Tl(Ⅰ) concentrations indicated threeoperational stages: start-up, developing and maturation. Over time, the removal efficiency of Tl(Ⅰ) graduallyimproved, plateauing at approximately 80 % eventually. Throughout operation, Tl(Ⅰ) was sequestrated viasurface complexation and ion exchange. Besides, enrichment of Sphingobium and other typical manganeseoxidizing microorganisms (MnOM) during operation facilitated Mn(Ⅱ) and Tl(Ⅰ) oxidation and sequestration bygenerating biogenic manganese oxides (BioMnOx). Additionally, the accurate control of water quality andoperating conditions during operation could also enhance removal efficiency. In summary, physicochemicalactions of Mn oxides and biochemical actions of microorganisms synergistically contributed to the sequestrationof Mn(Ⅱ) and Tl(Ⅰ). These findings provided a novel and sustainable method for the long-term and stabletreatment of industrial wastewater containing thallium.

ThalliumManganeseMn sand filterSynergistic actionManganese oxidizing microorganisms

Yuheng Huang、Ziqiang Liu、Hongxia Liu、Chengxue Ma、Wanpeng Chen、Xiaoliu Huangfu

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Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment, and Ecology, Chongqing University, Chongqing400044, China

State Key Laboratory of Urban Water Resource, and Environment, School of Municipal, and Environmental Engineering, Harbin Institute of Technology, Harbin150090, China

2024

10.1016/j.scitotenv.2023.168085

Science of the Total Environment

Science of the Total Environment

EISCI
ISSN：0048-9697
年,卷(期)：2024.908(Jan.15)
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