Adsorption of platinum(IV) and palladium(II) from aqueous solution by magnetic cross-linking chitosan nanoparticles modified with ethylenediamine

Journal of Hazardous Materials
Limin ZhouZhirong Liu

Abstract

The adsorption characteristics of platinum(IV) and palladium(II) from aqueous solutions onto the ethylenediamine-modified magnetic chitosan nanoparticles (EMCN) have been investigated. The magnetic chitosan nanoparticles were prepared by adding the basic precipitant of NaOH solution into a W/O microemulsion system. The transmission electron microscope showed that the diameter of EMCN was from 15 to 40 nm. The adsorption experiments indicated that the maximum adsorption capacity occurred at around pH 2.0 for both Pt(IV) and Pd(II). Due to the small diameter and the high surface reactivity, the adsorption equilibrium of Pt(IV) and Pd(II) onto the EMCN reached very quickly. The maximum loading capacity of EMCN for Pt(IV) and Pd(II) was determined to be 171 and 138 mg/g, respectively. Sorption isotherms were determined both in single component with pure metal solutions and bicomponent systems with different Pd/Pt mass ratios. The results showed that the sorbents had a greater affinity for Pt(IV) than for Pd(II). The total sorption capacity was comparable to that of each metal individually, indicating that the metals compete for the same sorption sites. It was found that 0.4 M HNO(3)-1.0 M thiourea solution provided effectiveness of...Continue Reading

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Citations

Mar 4, 2014·Bioresource Technology·Yung-Chung LoJo-Shu Chang
Nov 5, 2013·Advances in Colloid and Interface Science·D Harikishore Kumar Reddy, Seung-Mok Lee
Jul 10, 2012·Journal of Hazardous Materials·Hang WangShoujian Li
Aug 13, 2011·Journal of Pharmaceutical and Biomedical Analysis·Tao Zhu, Kyung Ho Row
Mar 16, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alexander Pestov, Svetlana Bratskaya
Oct 30, 2016·International Journal of Biological Macromolecules·Srinu NagireddiRamgopal Uppaluri
May 24, 2013·International Journal of Molecular Sciences·Tai-Lin Lin, Hsing-Lung Lien
Oct 7, 2018·Environmental Science and Pollution Research International·Maryam OmidinasabNeemat Jaafarzadeh
Jul 2, 2021·Environmental Science and Pollution Research International·Hossein Shahriyari FarMahboubeh Rabbani

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