Adsorption and desorption characteristics of mercury(II) ions using aminated chitosan bead
Adsorption and desorption characteristics of mercury(II) ions using aminated chitosan bead
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DOI：
10.1016/j.watres.2005.07.020
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发表时间：
2005-10-01
期刊：
影响因子：
12.8
通讯作者：
Park, KH
中科院分区：
文献类型：
--
作者：
Jeon, C;Park, KH
研究了氨基化壳聚糖球对汞离子的吸附和解吸特性。胺化壳聚糖珠对汞离子的吸附是一个放热过程，随着温度的降低，它们之间的结合强度增加。在150 rpm转速下，对汞离子的吸附在100 min内基本完成。随着吸附剂剂量的增加，汞吸收能力降低，而去除效率提高。离子强度、有机材料和碱土金属离子对微珠的影响不大。EDTA对吸附在胺化壳聚糖珠上的汞离子的有效解吸率约为95%，在第5次循环时，回收珠的吸附容量仍保持在90%的水平。(c) 2005年Elsevier Ltd出版
Adsorption and desorption characteristics for mercury ions using aminated chitosan bead which showed very high affinity to mercury ions were studied. The adsorption of mercury ions using aminated chitosan bead was an exothermic process since binding strength each other increased as the temperature decreased. And the adsorption of mercury ions was almost completed in 100 min at 150 rpm. In case that adsorbent dose increased, mercury uptake capacity decreased, while, removal efficiency increased. The beads were not greatly affected by the ionic strength, organic material and alkaline-earth metal ions. Mercury ions adsorbed on aminated chitosan bead were desorbed effectively about 95% by EDTA and the adsorption capacity of the recycled beads can still be maintained at 90% level at the 5th cycle. (c) 2005 Published by Elsevier Ltd.