Efficient removal of cadmium (II) ions from aqueous solution by CoFe2O4/chitosan and NiFe2O4/chitosan composites as adsorbents-Reference-Cited by-同舟云学术

Efficient removal of cadmium (II) ions from aqueous solution by CoFe2O4/chitosan and NiFe2O4/chitosan composites as adsorbents

Published:2018-12-14 Issue:11 Volume:78 Page:2297-2307
ISSN:0273-1223
Container-title:Water Science and Technology
language:en
Short-container-title:

Author:

Homayonfard Ashraf¹,Miralinaghi Mahsasadat²,Shirazi Reza Haji Seyed Mohammad¹,Moniri Elham²

Affiliation:

1. Faculty of Natural Resources and Environment, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran

2. Department of Chemistry, Faculty of Science, Varamin-Pishva Branch , Islamic Azad University, Varamin, Iran

Abstract

Abstract Magnetically recoverable chitosan based spinel cobalt and nickel ferrite (CS/CoFe2O4 and CS/NiFe2O4, respectively) composites were successfully prepared in one step. A series of batch adsorption experiments indicated that the removal of toxic Cd(II) ions by the as-obtained composites as adsorbents was pH-dependent, rapid, proficient, better fitted to pseudo-second-order kinetics model and Langmuir monolayer adsorption isotherm model. Compared to the naked particles, magnetic bio-polymer composites exhibited promoted adsorption capacity. Competitive adsorption studies in binary solutions illustrated preferable selectivity of adsorbents toward Cd(II) ions in the presence of co-existing cations. More importantly, CS/CoFe2O4 and CS/NiFe2O4 had a satisfactory practical application in the removal of Cd(II) from real groundwater spiked with cadmium. The exhausted adsorbents could be regenerated efficiently by 0.5 M HNO3. The results from this study support that CS/CoFe2O4 and CS/NiFe2O4 prove excellent adsorption behavior for the removal of Cd(II) ions from aqueous media.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

Link

http://iwaponline.com/wst/article-pdf/78/11/2297/520576/wst078112297.pdf

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