Adsorption characteristics of copper(II) onto non-crosslinked and cross-linked chitosan immobilized on sand

Kuo Jung Hsien, Cybelle M. Futalan, Wan Chi Tsai, Chi Chuan Kan, Chun Shuo Kung, Yun-Hwei Shen, Meng Wei Wan

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

In this study, Cu(II) removal using non-crosslinked and cross-linked chitosan-coated sand (CCS) from aqueous solution was investigated. To improve the mechanical and chemical stability, chitosan was coated onto sand (CCS) and cross-linked using epichlorohydrin (ECH) and ethylene glycol diglycidyl ether (EGDE). The effect of pH (2.0-5.0) on the adsorption capacity was examined. The maximum adsorption capacity of CCS, CCS-ECH, and CCS-EGDE occurred at an initial pH of 5.0, 4.0, and 5.0, respectively. The kinetic experimental data agreed well with pseudo-second order equation (R2 > 0.988), which implies that chemisorption is the rate controlling step. Langmuir, Freundlich and Dubinin-Radushkevich were used to analyze the equilibrium data, where the Langmuir model provided the best fit for the isotherm data obtained using CCS, CCS-ECH, and CCS-EDGE (R2 > 0.990). Adsorption-desorption was carried out using HCl solution (pH 1.0 and 3.0) and tap water (pH 7.0), where HCl solution (pH 1.0) provided the greatest recovery of Cu(II) at 98.3, 87.5 and 83.5% for CCS, CCS-ECH and CCS-EDGE, respectively. The removal of Cu(II) from real groundwater samples were studied, where removal of 57.4, 62.4 and 77.5% were achieved using CCS, CCS-ECH and CCS-EDGE.

原文English
頁(從 - 到)5574-5582
頁數9
期刊Desalination and Water Treatment
51
發行號28-30
DOIs
出版狀態Published - 2013 一月 1

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

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