Adsorption of Silver (I) From Aqueous Solution Using Chitosan/Montmorillonite Composite Beads

被引：43
作者：
Jintakosol, Thanut [1 ]
Nitayaphat, Walaikorn [2 ]
机构：
[1] Srinakharinwirot Univ, Dept Gen Sci, Fac Sci, Bangkok, Thailand
[2] Srinakharinwirot Univ, Dept Home Econ, Fac Sci, Bangkok, Thailand
来源：
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2016年 / 19卷 / 05期
关键词：
Adsorption; Chitosan; Composite; Montmorillonite; Silver; METAL-IONS; CHITOSAN-MONTMORILLONITE; REMOVAL; EQUILIBRIUM; COPPER; DESORPTION; RECOVERY; CADMIUM; WATER; AG+;
D O I：
10.1590/1980-5373-MR-2015-0738
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Chitosan/montmorillonite (CTS-MMT) composite beads were used as adsorbents for the removal of silver ion (Ag+) from aqueous solution. Equilibrium adsorption was achieved within 150 min at 3% MMT of chitosan solution. The optimum pH value for Ag+ removal was found to be 6-7. The maximum adsorbent dosage for Ag+ removal was 5 g/L. Under above maximum conditions the Ag+ removal was 95.7%. The maximum adsorption capacities of CTS and CTS-MMT composite beads as obtained from Langmuir isotherm were found to be 38.46 and 43.48 mg/g, respectively. The adsorption kinetic agrees well with the pseudo second order model. The Ag+ desorption of CTS-MMT composite bead was 17.39% at pH=4. SEM/EDX images confirm that after adsorption the Ag+ were dispersed onto the composite bead surface. The adsorption and desorption experiment demonstrated that the CTS-MMT composite beads can be used as an effective adsorbents for removal of Ag+ from aqueous solution.
引用
收藏
页码：1114 / 1121
页数：8
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