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Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation
Minjie Yao; Bin Lian; Hailiang Dong; Jianchao Hao; Congqiang Liu
Corresponding AuthorBin Lian
2013
Source PublicationJournal of Environmental Sciences
Volume25Issue:12Pages:2422–2428
Abstract

Although microbial treatments of heavy metal ions in wastewater have been studied, the removal of these metals through incorporation into carbonate minerals has rarely been reported. To investigate the removal of Fe3+ and Pb2+, two representative metals in wastewater, through the precipitation of carbonate minerals by a microbial flocculant (MBF) produced by Bacillus mucilaginosus. MBF was added to synthetic wastewater containing different Fe3+ and Pb2+ concentrations, and the extent of flocculation was analyzed. CO2 was bubbled into the mixture of MBF and Fe3+/Pb2+ to initiate the reaction. The solid substrates were analyzed via X-ray diffraction, transmission electron microscopy and energy dispersive spectroscopy. The results showed that the removal efficiency decreased and the MBF adsorption capacity for metals increased with increasing heavy metal concentration. In the system containing MBF, metals (Fe3+ and Pb2+), and CO2, the concentrated metals adsorbed onto the MBF combined with the dissolved CO2, resulting in oversaturation of metal carbonate minerals to form iron carbonate and lead carbonates. These results may be used in designing a method in which microbes can be utilized to combine CO2 with wastewater heavy metals to form carbonates, with the aim of mitigating environmental problems.

KeywordBacillus Mucilaginosus Microbial Flocculation Wastewater Treatment Carbon Dioxide Fixation Mineral Carbonation
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/5150
Collection环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
Corresponding AuthorBin Lian
Recommended Citation
GB/T 7714
Minjie Yao,Bin Lian,Hailiang Dong,et al. Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation[J]. Journal of Environmental Sciences,2013,25(12):2422–2428.
APA Minjie Yao,Bin Lian,Hailiang Dong,Jianchao Hao,&Congqiang Liu.(2013).Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation.Journal of Environmental Sciences,25(12),2422–2428.
MLA Minjie Yao,et al."Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation".Journal of Environmental Sciences 25.12(2013):2422–2428.
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