Research Progress on Bioaccumulation of Heavy Metals in Wastewater by Filamentous Fungi

doi:10.13560/j.cnki.biotech.bull.1985.2017-0516

Abstract

Abstract: Wastewater containing heavy metals is the one that most seriously pollutes environment and damages human health. Bioaccumulation of heavy metals by filamentous fungi is an important mean for processing heavy metal wastewater，and it has been a hot research topic in recent years. Firstly，the advantages and disadvantages of conventional methods of removing heavy metals from wastewater were reviewed，including chemical precipitation，ion exchange and adsorption. Among them，biosorption owns special advantages，such as low price and low consumption of biosorbents，its high effectiveness in absorbing the heavy metal ions，wide application and biosorbents reusable，thus biosorption is particularly suitable for the treatment of trace heavy metal wastewater. Secondly，the types of filamentous fungi that were applied to the removal of heavy metals were introduced，such as Rhicopus（Pb²⁺，Cd²⁺，and Cr^{5+），Mucor（Pb²⁺，Ni²⁺，Cd²⁺，and Zn²⁺），Aspergillus（Pb²⁺），Trichoderma（Zn²⁺ and Pb²⁺），and Basidiomycota（Cu²⁺，Pb²⁺，and Cd²⁺）；they all presented ideal results in removing heavy metals. Thirdly，the mechanisms of bioaccumulation were summarized，mainly about extracellular，cell surface，and intracellular absorption of heavy metals. Lastly，the several factors affecting the efficiency of removing heavy metals（pH，initial concentration of heavy metal ions，proportion of adsorbent，temperature，and coexisted ions）were discussed，as well as the future of studying filamentous fungi was prospected. It is aimed at expanding the application of filamentous fungi in the heavy metal accumulation from wastewater and laying a foundation for initiating new types of filamentous fungi in accumulating heavy metal from wastewater.}

Key words: filamentous fungi, bioaccumulation, mechanisms, prospect

MA Yan, YU Xiao-bin. Research Progress on Bioaccumulation of Heavy Metals in Wastewater by Filamentous Fungi[J]. Biotechnology Bulletin, 2017, 33(10): 59-63.

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