Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)

Scientific Reports
Chi Him Jim LukChi Wai Kan

Abstract

The use of microorganisms in biosorption is one of the most promising ways to remove trace amounts of heavy metal ions. Nevertheless, the enhancement of the successful removal of heavy metal ions by using different combinations of biosorbents is not generally guaranteed which leaves room to explore the application of the technique. In this study, the performance of free and immobilized forms of a yeast strain, Candida krusei (C. krusei), and calcium alginate (CaAlg) are evaluated for their ability to remove copper(II). Infrared spectroscopy, studies on the effects of pH and temperature, and kinetics and isotherm modelling are carried out to evaluate the biosorption. The infrared spectroscopy shows that the primary biosorption sites on the biosorbents are carboxylate groups. In addition, a higher pH and higher temperatures promote biosorption while a decline in biosorption ability is observed for C. krusei at 50 °C. The kinetics study shows that C. krusei, CaAlg and immobilized C. krusei (MCaAlg) conform with good correlation to pseudo-second order kinetics. MCaAlg and CaAlg fit well to the Langmuir isotherm while C. krusei fits well to the Temkin isotherm. From the experimental data, encapsulating C. krusei showed improved bios...Continue Reading

References

Dec 6, 2005·Bioresource Technology·Purnima AnandRajendra Kumar Saxena
May 30, 2009·Colloids and Surfaces. B, Biointerfaces·Weizhi ZhouYuzhong Zhang
Aug 3, 2011·Journal of Biotechnology·Päivi YlitervoMohammad J Taherzadeh
Oct 3, 2012·Bioinorganic Chemistry and Applications·Víctor M Martínez-JuárezIsmael Acosta-Rodríguez
Sep 13, 2014·Water Research·Heming Wang, Zhiyong Jason Ren

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Citations

May 12, 2019·Environmental Science and Pollution Research International·Maryam FayaziAida Iraji
Jan 20, 2019·Scientific Reports·Yoshihiro OjimaMasayuki Azuma

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Methods Mentioned

BETA
infrared spectroscopy

Software Mentioned

MCaAlg

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