羟丙基壳聚糖对Cr(Ⅵ)的吸附性能研究(英文)

STUDY ON ADSORPTION PROPERTIES OF HYDROXYPROPYL CHITOSAN FOR Cr(Ⅵ)

研究了羟丙基壳聚糖对Cr(Ⅵ)的吸附作用,探讨了溶液的pH值、反应时间、温度、初始Cr(Ⅵ)浓度和离子浓度等因素对其吸附性能的影响.实验表明:pH是羟丙基壳聚糖吸附Cr(Ⅵ)的主要影响因素.在pH等于5时,对Cr(Ⅵ)初始浓度为15 mg/L的溶液,可控制温度在20℃左右吸附2 h,吸附剂羟丙基壳聚糖用量为1%(g/mL)时具有一定的吸附效果,且发现离子浓度对吸附性能也有影响.

In this paper,adsorption behavior of hydroxypropyl chitosan for Cr（Ⅵ） was studied. The effects of various factors, such as pH value, reaction time, temperature, initial concentration,ion concentration on the adsorption behaVior for Cr（Ⅵ） were discussed. The resuits showed that pH was one of the main factors for adsorbing Cr（Ⅵ）. When pH was 5, for the initial Cr（Ⅵ） concentration of 15 mg/L,at about 20 ℃ ,absorption for 2 h,a certain adsorption capacity can be achieved by using 1%（g/mL） of hydroxypropyl chitosan, and found that ion concentration had an effect on adsorption properties.