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

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...

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Autores principales:	Chi Him Jim Luk, Joanne Yip, Chun Wah Marcus Yuen, Siu Kwong Pang, Kim Hung Lam, Chi Wai Kan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/000f6b58e12d4033bf6927ae281e1a77
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spelling	oai:doaj.org-article:000f6b58e12d4033bf6927ae281e1a772021-12-02T15:05:58ZBiosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)10.1038/s41598-017-02350-72045-2322https://doaj.org/article/000f6b58e12d4033bf6927ae281e1a772017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02350-7https://doaj.org/toc/2045-2322Abstract 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 biosoprtion and address clogging in practical applications.Chi Him Jim LukJoanne YipChun Wah Marcus YuenSiu Kwong PangKim Hung LamChi Wai KanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chi Him Jim Luk Joanne Yip Chun Wah Marcus Yuen Siu Kwong Pang Kim Hung Lam Chi Wai Kan Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)
description	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 biosoprtion and address clogging in practical applications.
format	article
author	Chi Him Jim Luk Joanne Yip Chun Wah Marcus Yuen Siu Kwong Pang Kim Hung Lam Chi Wai Kan
author_facet	Chi Him Jim Luk Joanne Yip Chun Wah Marcus Yuen Siu Kwong Pang Kim Hung Lam Chi Wai Kan
author_sort	Chi Him Jim Luk
title	Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)
title_short	Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)
title_full	Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)
title_fullStr	Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)
title_full_unstemmed	Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)
title_sort	biosorption performance of encapsulated candida krusei for the removal of copper(ii)
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/000f6b58e12d4033bf6927ae281e1a77
work_keys_str_mv	AT chihimjimluk biosorptionperformanceofencapsulatedcandidakruseifortheremovalofcopperii AT joanneyip biosorptionperformanceofencapsulatedcandidakruseifortheremovalofcopperii AT chunwahmarcusyuen biosorptionperformanceofencapsulatedcandidakruseifortheremovalofcopperii AT siukwongpang biosorptionperformanceofencapsulatedcandidakruseifortheremovalofcopperii AT kimhunglam biosorptionperformanceofencapsulatedcandidakruseifortheremovalofcopperii AT chiwaikan biosorptionperformanceofencapsulatedcandidakruseifortheremovalofcopperii
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Biosorption Performance of Encapsulated Candida krusei for the removal of Copper(II)

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