TY - JOUR
T1 - Adsorption characteristics of copper(II) onto non-crosslinked and cross-linked chitosan immobilized on sand
AU - Hsien, Kuo Jung
AU - Futalan, Cybelle M.
AU - Tsai, Wan Chi
AU - Kan, Chi Chuan
AU - Kung, Chun Shuo
AU - Shen, Yun-Hwei
AU - Wan, Meng Wei
PY - 2013/1/1
Y1 - 2013/1/1
N2 - 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.
AB - 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.
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U2 - 10.1080/19443994.2013.770191
DO - 10.1080/19443994.2013.770191
M3 - Article
AN - SCOPUS:84882703255
VL - 51
SP - 5574
EP - 5582
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
SN - 1944-3994
IS - 28-30
ER -