| 刘烨，吕文英，李中阳，姚琨，黄春桃，刘国光.羧甲基壳聚糖-膨润土复合吸附剂对水中铊的吸附作用研究[J].广东农业科学,2013,40(16):147-149 |
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羧甲基壳聚糖-膨润土复合吸附剂对水中铊的吸附作用研究 |
| Adsorption of thallium in water with carboxymethyl chitosan-bentonite compound adsorbent |
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| DOI： |
| 中文关键词: 复合吸附剂 铊 吸附 |
| 英文关键词: compound adsorbent thallium adsorption |
| 基金项目: |
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| 摘要点击次数: 1155 |
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| 中文摘要: |
| 以羧甲基壳聚糖和膨润土为原料，制备羧甲基壳聚糖-膨润土复合吸附剂，并将其用于对水中铊的吸附，研究了吸附时间、溶液pH 值和温度等对铊吸附性能的影响。结果表明，羧甲基壳聚糖-膨润土复合吸附剂对废水中铊的吸附，随废水pH值升高而增大；当水温低于50℃时，升温对吸附有利，当水温高于50℃时，再进一步升温，会导致吸附剂对铊的平衡吸附量减小；吸附剂对铊的吸附容量与铊的浓度关系密切，当铊的初始浓度为100 mg/L，吸附平衡时铊的浓度为48.54 mg/L，对应的吸附容量为15.43mg/g。通过改变吸附剂的用量可以达到控制出水铊浓度的目的。 |
| 英文摘要: |
| A composite adsorbent was prepared by carboxymethyl chitosan and bentonite, and was used to adsorp thallium in water. The effect of adsorption time, pH and temperature on the adsorption properties of the composite adsorbent to thallium was investigated.The results indicated the adsorptive capacity of carboxymethyl chitosan-bentonite compound adsorbent for thallium in water was enhanced with the increase of pH. The adsorption process was influenced by temperature, when the temperature was lower than 50℃, it being of benefit to the adsorption with the temperature increasing, but when the temperature was higher than 50℃, it being opposite of the adsorption with the temperature increasing. Adsorption capacity for thallium was bound up with the concentration of thallium. When the initial concentration of thallium was 100 mg/L, its equilibrium concentration was 48.54 mg/L, and adsorption capacity was 15.43 mg/g.The purpose of controlling thallium concentration in yielding water was achieved by changing the amount of adsorbent. |
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