Removal of Zn(II) from electroplating effluent using yeast biofilm formed on gravels: batch and column studies

Journal of Environmental Health Science Engineering

Nilanjana Das¹  Preethy Chandran²  Lakshmi V¹  Geetanjali Basak¹ 

[1] Environmental Biotechnology Division, School of Bio- Sciences and Technology, VIT University, Vellore, Tamil Nadu, India;School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamil Nadu, India

关键词: Zn(II) removal;    Yeast;    Packed bed column;    Electroplating effluent;    CLSM;    Biofilm on gravels;   

Others  :  810966
DOI  :  10.1186/2052-336X-12-8

 received in 2013-02-27, accepted in 2013-10-06,  发布年份 2014

【 摘 要 】

Background

Present study deals with the removal of Zn(II) ions from effluent using yeast biofilm formed on gravels.

Methods

The biofilm forming ability of Candida rugosa and Cryptococcus laurentii was evaluated using XTT (2,3-bis[2-methoxy-4-nitro-5-sulfophenyl]-2H-tetrazolium-5-carboxanilide) reduction assay and monitored by scanning electron microscopy (SEM), and Confocal laser scanning microscopy (CLSM). Copious amount of extracellular polymeric substances (EPS) produced by yeast species was quantified and characterized by Fourier transform infrared spectroscopy (FT-IR).

Results

Yeast biofilm formed on gravels by C. rugosa and C. laurentii showed 88% and 74.2% removal of Zn(II) ions respectively in batch mode. In column mode, removal of Zn(II) ions from real effluent was found to be 95.29% by C. rugosa biofilm formed on gravels.

Conclusion

The results of the present study showed that there is a scope to develop a cost effective method for the efficient removal of Zn(II) from effluent using gravels coated with yeast biofilm.

【 授权许可】

   
2014 Basak et al.; licensee BioMed Central Ltd.

【 图 表 】

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