Removal of Cr(VI) from solution by free and immobilised spores of Aspergillus niger

Micro & nano letters

article

Binqiao Ren¹  Jingyao Wang²  Weijun Zhang¹  Kan Kan¹  Luyang Zhao¹  Xiaoxiao Song¹  Chongwei Cui² 

[1] Institute of Advanced Technology of Heilongjiang Academy of Sciences;Harbin Institute of Technology

关键词: chromium;    wastewater treatment;    pH;    sorption;    Fourier transform infrared spectra;    scanning electron microscopy;    spectrochemical analysis;    reaction kinetics;    microbial methods;    effluent detoxification;    metal uptake;    Aspergillus niger spores;    free spores;    immobilised biosorbent;    toxic metals;    industrial wastewater;    batch system;    biomass;    maximum metal removal capacity;    biosorption mechanism;    Fourier transfer infrared spectra;    scanning electron microscopy;    pH levels;    aqueous solution;    Cr;   

DOI  :  10.1049/mnl.2017.0043

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Despite the current interest in microbial methods for the detoxification of effluents, relatively little work has focused on the characterisation of metal uptake by small Aspergillus niger spores, particularly for heavy metals present at different and low concentrations. The objective of this study was to determine the ability of A. niger spores (free spores and as immobilised biosorbent) to remove toxic metals from an industrial wastewater as a batch system. The simultaneous influences of the mass of pH and biomass on the ability of spores to uptake of Cr(VI) were analysed. The free and immobilised biosorbent removed Cr(VI) efficiently with a maximum metal removal capacity of 55 and 40 mg/g, respectively. The biosorption mechanism was also investigated using Fourier transfer infrared and scanning electron microscopy. Immobilised spores of A. niger were more stable in solutions at different pH levels and allowed easier separation from aqueous solution than free spores, suggesting significant potential for future industrial application.

【 授权许可】

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