4.7 Article

Enhanced heavy metal ions adsorption by 4-aminobenzoic acid grafted on chitosan/epichlorohydrin composite: Kinetics, isotherms, thermodynamics and desorption studies

期刊

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.11.082

关键词

-

向作者/读者索取更多资源

The multi-functional chitosan is important for the development of novel adsorbents which is needed for the effective removal of scavenging metal ions from water and wastewater. In this study the functionalized materials were characterize by FTIR, SEM/EDX, TGA/DTA, BET and XRD. Physicochemical parameters including pH, contact time, ionic strength and temperature were investigated in batch mode to optimize the conditions to be applied on a commercial scale for the maximum removal of metal ions using batch applications. The results showed that adsorption performance of grafted cross-linked chitosan beads can be modeled efficiently by Langmuir isotherm and pseudo-second order kinetic model. Thermodynamic parameters such as Gibb's free energy change (Delta G degrees), enthalpy change (Delta H degrees) and entropy change (Delta S degrees) were calculated and the results showed the adsorption of Pb(II), Cu(lI), Ni(II),Zn(II) and Cd(II) ions onto grafted crosslinked chitosan beads (G/ECH-CS) are spontaneous and endothermic in nature. Batch regeneration of the spent adsorbent from the single component mixture was effective. Multiple adsorption/desorption experiments were also carried out, and it was found that 0.0% mass loss of the G/ECH-CS was observed after the third cycle of adsorption/desorption studies. (C) 2018 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据