TY - JOUR
T1 - Equilibrium and kinetic studies for silver removal from aqueous solution by hybrid hydrogels
AU - Tran, Thu Hong
AU - Okabe, Hirotaka
AU - Hidaka, Yoshiki
AU - Hara, Kazuhiro
N1 - Funding Information:
The authors are grateful to the JSPS KAKENHI Grant Numbers JP24360398 , JP21656239 for financing this work; Kyushu University's Center of Material Properties and Function for facilitating NMR measurements and Center for Accelerator and Beam Applied Science for gamma-ray irradiation, respectively.
Publisher Copyright:
© 2018
PY - 2019/3/5
Y1 - 2019/3/5
N2 - Hybrid hydrogels were prepared by blending Carboxymethyl chitosan (CMCts), Carboxymethyl cellulose (CMC) with Sodium sulfonate styrene (SSS) by 60-kGy gamma rays. The prepared hydrogels were utilized as silver-ion (Ag) sorbent under non- and competitive cases. Batch adsorption experiments were conducted in functional conditions including contact time, ratios of (CMC:CMCts) and SSS, pH value, temperature and adsorbent weight. Equilibrium contact time of 10 h. was obtained by the adsorption material. The optimal 4:2 ratio of (CMC:CMCts):SSS showed the Ag highest adsorption efficiency. The maximum percentage of Ag+ removal was achieved at the pH 5. The temperature effect on the adsorption ability of hybrid hydrogel indicated the Ag adsorption process was endothermic and spontaneous. The Langmuir isotherm model fitted Ag adsorption data well, assuming a monolayer adsorption with predicted maximum adsorption capacity of 451.74 × 10−3 mg. g–1. From the kinetic data, the process of Ag adsorption had higher agreement with the pseudo-2nd order model, predicting the amount of Ag+ uptake at different contact time intervals and at equilibrium.
AB - Hybrid hydrogels were prepared by blending Carboxymethyl chitosan (CMCts), Carboxymethyl cellulose (CMC) with Sodium sulfonate styrene (SSS) by 60-kGy gamma rays. The prepared hydrogels were utilized as silver-ion (Ag) sorbent under non- and competitive cases. Batch adsorption experiments were conducted in functional conditions including contact time, ratios of (CMC:CMCts) and SSS, pH value, temperature and adsorbent weight. Equilibrium contact time of 10 h. was obtained by the adsorption material. The optimal 4:2 ratio of (CMC:CMCts):SSS showed the Ag highest adsorption efficiency. The maximum percentage of Ag+ removal was achieved at the pH 5. The temperature effect on the adsorption ability of hybrid hydrogel indicated the Ag adsorption process was endothermic and spontaneous. The Langmuir isotherm model fitted Ag adsorption data well, assuming a monolayer adsorption with predicted maximum adsorption capacity of 451.74 × 10−3 mg. g–1. From the kinetic data, the process of Ag adsorption had higher agreement with the pseudo-2nd order model, predicting the amount of Ag+ uptake at different contact time intervals and at equilibrium.
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U2 - 10.1016/j.jhazmat.2018.11.008
DO - 10.1016/j.jhazmat.2018.11.008
M3 - Article
C2 - 30447630
AN - SCOPUS:85056472708
SN - 0304-3894
VL - 365
SP - 237
EP - 244
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -