Hexavalent chromium removal from aqueous solution using functionalized chitosan as a novel nano-adsorbent: modeling and optimization, kinetic, isotherm, and thermodynamic studies, and toxicity testing

Environmental Science and Pollution Research International
Hassan AslaniMohammad Khazaei

Abstract

Hexavalent chromium is a highly toxic metal that can enter drinking water sources. Chitosan, which contains amino and hydroxyl functional groups, is considered an appropriate candidate to remove heavy metals through absorption. In this study, a novel adsorbent, magnetic nanoparticles of chitosan modified with polyhexamethylene biguanide (Ch-PHMB NPs) was synthesized and was used to successfully remove chromium from aqueous solution. Quadratic models with independent variables including pH, adsorbent dosage, time, and the initial concentration of chromium were proposed through RSM to describe the behavior of both magnetic chitosan (M-Ch) and Ch-PHMB NPs in Cr(VI) removal. Optimized models with adjusted R2 values of 0.8326 and 0.74 for M-Ch and Ch-PHMB NPs were developed. Cr(VI) removal from aqueous solution by both absorbents followed pseudo-second-order kinetics. The experimental data were best fitted to the Temkin and Freundlich models for M-Ch and Ch-PHMB NPs, respectively. M-Ch and Ch-PHMB NPs can effectively remove the hexavalent chromium from aqueous solution with pH above 7. Ch-PHMB NPs have higher removal efficiency than M-Ch, removing up to 70% of Cr(VI) from aqueous solution. However, toxicity evaluation on Daphnia mag...Continue Reading

References

Dec 21, 2004·Bioresource Technology·Mahmut Ozacar, I Ayhan Sengil
Dec 6, 2005·Chemosphere·Jae-Kyu Yang, Seung-Mok Lee
Nov 23, 2006·Bioresource Technology·Gulsin Arslan, Erol Pehlivan
Sep 11, 2007·Journal of Hazardous Materials·P BaroniM M Beppu
May 12, 2009·Waste Management·Grazyna Bystrzejewska-PiotrowskaPawel L Urban
Jun 24, 2009·The Science of the Total Environment·Bing GengXinhua Qi
Jun 21, 2011·International Journal of Biological Macromolecules·Y G Abou El-ReashA M Ouf
Jul 4, 2012·International Journal of Environmental Research and Public Health·Jun DaiChunYuan Tao
Mar 19, 2013·International Journal of Biological Macromolecules·M S SivakamiP N Sudha
Nov 12, 2013·Journal of Environmental Management·Paripurnanda LoganathanJaya Kandasamy
Dec 29, 2013·Journal of Colloid and Interface Science·Katrina C M KwokGordon McKay
Apr 1, 2014·International Journal of Biological Macromolecules·Rathinam Karthik, Sankaran Meenakshi
Sep 28, 2014·International Journal of Biological Macromolecules·Rathinam Karthik, Sankaran Meenakshi
Mar 10, 2015·Materials Science & Engineering. C, Materials for Biological Applications·Elena LlorensJordi Puiggalí
Aug 25, 2015·Journal of Environmental Health Science & Engineering·Reza RezaeeShahrokh Nazmara
Jan 23, 2016·Journal of Environmental Health Science & Engineering·Dalel DaâssiTahar Mechichi

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Citations

Feb 6, 2020·International Journal of Environmental Research and Public Health·Daixi ZhouChunfang Tang
Jan 11, 2020·Environmental Science and Pollution Research International·Azam Alsadat Tabatabaiee BafrooeeAmir Hesam Hasani
Sep 20, 2018·Environmental Science and Pollution Research International·Pâmela Becalli VilelaAlexandre Tadeu Paulino
Jun 15, 2020·Environmental Science and Pollution Research International·Muhammad Adnan TariqShafaqat Ali

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