Adsorption behavior of Zn (Ⅱ) ion onto chitosan derivatives
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DING Ping;HUANG Kelong;LI Guiyin;ZENG Wenwen;JIAO Feipeng
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丁萍;黄可龙;李桂银;曾雯雯;焦飞鹏
中南大学化学化工学院,湖南 长沙 410083
Abstract: An adsorption system was used to study the adsorption of Zn(Ⅱ) ion from chitosan derivatives,chitosan α-ketoglutaric acid(KCTS)and hydroxamated chitosan α-ketoglutaric acid(HKCTS).Experiments were carried out to study the effects of pH and concentration of Zn(Ⅱ) ion.It was found that the bonding between Zn(Ⅱ) and chitosan derivatives was in accordance with the Langmuir isotherm.The kinetic experimental data correlated well with the second-order kinetic model, indicating that the chemical sorption was the rate-limiting step.The apparent activation energy value of adsorption were 25.47 kJ·mol-1 and 5.473 kJ·mol-1 for KCTS and HKCTS respectively, and the sorption rate constant of Lagergren second-order sorption were 0.00311 g·mg-1·min-1 and 0.005 g·mg-1·min-1at 293 K, respectively.
DING Ping;HUANG Kelong;LI Guiyin;ZENG Wenwen;JIAO Feipeng.
丁萍;黄可龙;李桂银;曾雯雯;焦飞鹏 . 壳聚糖衍生物对Zn(Ⅱ)的吸附行为 [J]. CIESC Journal.
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https://hgxb.cip.com.cn/EN/Y2006/V57/I11/2652