Equilibrium and kinetic studies for silver removal from aqueous solution by hybrid hydrogels

Thu Hong Tran, Hirotaka Okabe, Yoshiki Hidaka, Kazuhiro Hara

Research output: Contribution to journalArticle

Abstract

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.

LanguageEnglish
Pages237-244
Number of pages8
JournalJournal of Hazardous Materials
Volume365
DOIs
Publication statusPublished - Mar 5 2019

Fingerprint

Hydrogels
Silver
Adsorption
Isotherms
silver
isotherm
aqueous solution
adsorption
kinetics
Kinetics
Carboxymethylcellulose Sodium
Styrene
sulfonate
Chitosan
cellulose
Cellulose
Sodium
sodium
removal
Temperature

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Equilibrium and kinetic studies for silver removal from aqueous solution by hybrid hydrogels. / Tran, Thu Hong; Okabe, Hirotaka; Hidaka, Yoshiki; Hara, Kazuhiro.

In: Journal of Hazardous Materials, Vol. 365, 05.03.2019, p. 237-244.

Research output: Contribution to journalArticle

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