A silica gel-bound macrocycle system for the selective separation of toxic cadmium from metal-affluent aqueous matrix

• Authors: Hiroshi Hasegawa , Ismail Rahman , Zinnat Begum , Yoshihiro Umehara , Teruya Maki , Yoshiaki Furusho , Satoshi Mizutani
• Languages of publication: EN

Abstracts

EN

Abstract Selective separation of cadmium(II) on a macrocycle immobilized solid phase extraction (SPE) system namely AnaLig Cd-01, and commonly known as molecular recognition technology (MRT) gel, have been examined. The MRT-SPE able to retain the cadmium from the metal-affluent aqueous matrix at the pH range of 2 to 8, and the captured species can be recovered via elution with 1 and 6 M HNO3. Besides the effects of solution pH and eluent concentration, the impacts of sample loading flow rates and coexisting matrix ions were also investigated and optimized. The Cd(II) retention capacity of the MRT-SPE was 0.26 mmol g-1, and it can be reused for more than 100 loading and elution cycles. The Cd(II) recovery attained from the metal-spiked natural waters was satisfactory (95.3–98.1%). However, the Cd(II) retention ability of the MRT-SPE was significantly decreased when excess of chelant remain in the aqueous waste matrix. Graphical abstract [...]

Keywords

EN

Cadmium; Non-destructive removal; Solid phase extraction; Molecular recognition technology gel; Wastewater treatment

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2013
• Volume: 11
• Issue: 3
• Pages: 341-347

Dates

published

1 - 3 - 2013

online

28 - 12 - 2012

Contributors

author

Hiroshi Hasegawa

• Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan

author

Ismail Rahman

author

Zinnat Begum

• Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan

author

Yoshihiro Umehara

• Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan

author

Teruya Maki

• Institute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan

author

Yoshiaki Furusho

• GL Sciences, Inc., Nishishinjuku 6-22-1, Shinjuku, Tokyo, 163-1130, Japan

author

Satoshi Mizutani

• Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-Ku, Osaka, 558-8585, Japan

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Identifiers

DOI

10.2478/s11532-012-0176-1