Removal of Cd 2+ from contaminated water by nano-sized aragonite mollusk shell and the competition of coexisting metal ions

Yang Du; Lingyan Zhu; Guoqiang Shan

doi:10.1016/j.jcis.2011.10.023

Removal of Cd ²⁺ from contaminated water by nano-sized aragonite mollusk shell and the competition of coexisting metal ions

Yang Du, Lingyan Zhu, Guoqiang Shan

Research output: Contribution to journal › Article › peer-review

Abstract

The potential of using nano-sized aragonite mollusk shell (nano-Bio-ARA) to remove Cd ²⁺ from contaminated water was investigated by comparing the sorption kinetics and isotherms with the nano-sized calcite-type mollusk shell (nano-Bio-CAL) and nano-sized geological calcite (nano-Geo-CAL). Nano-Bio-ARA displayed extremely high sorption capacity to Cd ²⁺ (8.91mmol/g), much higher than nano-Bio/Geo-CAL, and many other natural or engineered materials. The results of thermodynamic experiments indicated that the sorption of Cd ²⁺ on the nano-ARA was a spontaneous and endothermic process. The coexisting metals in the solution displayed competition effect to the sorption of Cd ²⁺ on nano-Bio-ARA in the following order: Cu ²⁺>Cr ³⁺>Pb ²⁺>Zn ²⁺>Ca ²⁺. EDTA impeded the sorption of Cd ²⁺ on nano-Bio-ARA due to its strong chelating capacity to Cd ²⁺ in the solution. The results demonstrate that nano-Bio-ARA is a potential high-effective material to treat Cd ²⁺ contaminated water.

Original language	English (US)
Pages (from-to)	378-382
Number of pages	5
Journal	Journal of Colloid And Interface Science
Volume	367
Issue number	1
DOIs	https://doi.org/10.1016/j.jcis.2011.10.023
State	Published - Feb 1 2012
Externally published	Yes

Keywords

Aragonite
Cadmium
Mollusk shell
Nano

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

Online availability

10.1016/j.jcis.2011.10.023

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title = "Removal of Cd 2+ from contaminated water by nano-sized aragonite mollusk shell and the competition of coexisting metal ions",

abstract = "The potential of using nano-sized aragonite mollusk shell (nano-Bio-ARA) to remove Cd 2+ from contaminated water was investigated by comparing the sorption kinetics and isotherms with the nano-sized calcite-type mollusk shell (nano-Bio-CAL) and nano-sized geological calcite (nano-Geo-CAL). Nano-Bio-ARA displayed extremely high sorption capacity to Cd 2+ (8.91mmol/g), much higher than nano-Bio/Geo-CAL, and many other natural or engineered materials. The results of thermodynamic experiments indicated that the sorption of Cd 2+ on the nano-ARA was a spontaneous and endothermic process. The coexisting metals in the solution displayed competition effect to the sorption of Cd 2+ on nano-Bio-ARA in the following order: Cu 2+>Cr 3+>Pb 2+>Zn 2+>Ca 2+. EDTA impeded the sorption of Cd 2+ on nano-Bio-ARA due to its strong chelating capacity to Cd 2+ in the solution. The results demonstrate that nano-Bio-ARA is a potential high-effective material to treat Cd 2+ contaminated water.",

keywords = "Aragonite, Cadmium, Mollusk shell, Nano",

author = "Yang Du and Lingyan Zhu and Guoqiang Shan",

note = "The authors gratefully acknowledge the financial support of Tianjin Municipal Science and Technology Commission (10SYSYJC27200, 08FDZDSF03402), Ministry of Science and Technology (2009DFA91910, 2009BAC60B01), The Fundamental Research Funds for the Central Universities Environmental Remediation and Sustainable Development.",

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AU - Du, Yang

AU - Zhu, Lingyan

AU - Shan, Guoqiang

N1 - The authors gratefully acknowledge the financial support of Tianjin Municipal Science and Technology Commission (10SYSYJC27200, 08FDZDSF03402), Ministry of Science and Technology (2009DFA91910, 2009BAC60B01), The Fundamental Research Funds for the Central Universities Environmental Remediation and Sustainable Development.

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N2 - The potential of using nano-sized aragonite mollusk shell (nano-Bio-ARA) to remove Cd 2+ from contaminated water was investigated by comparing the sorption kinetics and isotherms with the nano-sized calcite-type mollusk shell (nano-Bio-CAL) and nano-sized geological calcite (nano-Geo-CAL). Nano-Bio-ARA displayed extremely high sorption capacity to Cd 2+ (8.91mmol/g), much higher than nano-Bio/Geo-CAL, and many other natural or engineered materials. The results of thermodynamic experiments indicated that the sorption of Cd 2+ on the nano-ARA was a spontaneous and endothermic process. The coexisting metals in the solution displayed competition effect to the sorption of Cd 2+ on nano-Bio-ARA in the following order: Cu 2+>Cr 3+>Pb 2+>Zn 2+>Ca 2+. EDTA impeded the sorption of Cd 2+ on nano-Bio-ARA due to its strong chelating capacity to Cd 2+ in the solution. The results demonstrate that nano-Bio-ARA is a potential high-effective material to treat Cd 2+ contaminated water.

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