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Potential use of ZnO@activated carbon nanocomposites for the adsorptive removal of Cd2+ ions in aqueous solutions

Title
Potential use of ZnO@activated carbon nanocomposites for the adsorptive removal of Cd2+ ions in aqueous solutions
Author
김기현
Keywords
HEAVY-METAL IONS; WASTE-WATER; CADMIUM REMOVAL; GREEN SYNTHESIS; NANOPARTICLES; NANOMATERIALS; ANTIBACTERIAL; NANOFLOWERS; NANOTUBES; SEDIMENT
Issue Date
2019-06
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
Environmental Research, v. 173, Page. 411-418
Abstract
Nowadays, the pollution in water resources has become a major concern, both environmentally and in perspective of human health. The bioaccumulation of pollutants, especially heavy metal ions through the food chain, poses a hazardous risk to humans and other living organisms. Nanomaterials and their composites have been recognized for their potential to resolve such problems. Herein, ZnO nanoparticles were synthesized and characterized via different microscopic/spectroscopic techniques. ZnO nanoparticles (i.e., 20 to 50 nrn) were obtained in high yield via a facile chemical approach. The ratio of ZnO nanoparticles and activated carbon was optimized to achieve enhanced electrostatic interactions for the effective adsorption of cadmium ions (Cd2+). The adsorptive performance of the nanocomposite was further assessed in relation to several key parameters (e.g., contact time, solution pH, and adsorbent/adsorbate dosage). The nanocomposites (1 mg/ml) offered amaximum adsorption capacity of 96.2 mg/g for Cd2+ ions as confirmed through adsorption isotherms for a best interpretation of the adsorption phenomenon. The favourable adsorption capacity of the synthesized ZnO/activated carbon (9:1) nanocomposites supported their use as an efficient sorbent material in practical performance metrics (e.g., partition coefficient of 0.54 mg g(-1) mu M-1) for the adsorption of Cd2+ ions.
URI
https://www.sciencedirect.com/science/article/pii/S0013935119301951?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/151851
ISSN
0013-9351; 1096-0953
DOI
10.1016/j.envres.2019.03.061
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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