壳聚糖吸附溴百里香酚蓝的机理研究  

Study on the Mechanism for Adsorption of Bromthylmol Blue on Chitosan

作　　者：贾海红[1] 杨超喜 马卫兴[1] 

机构地区：[1]淮海工学院化学工程学院,连云港222005 [2]江苏蓝海工程设计咨询有限责任公司,连云港222001

出　　处：《精细石油化工进展》2011年第7期54-58,共5页Advances in Fine Petrochemicals

基　　金：江苏省高校自然科学基础研究基金(07KJB610005);淮海工学院自然科学基金(Z2009020)

摘　　要：考察了溶液初始pH值和温度对吸附性能的影响,借助吸附等温线研究了壳聚糖吸附溴百里香酚蓝的吸附性能和机理,结果表明,在pH值为3.4时,壳聚糖对溴百里香酚蓝的吸附容量达到最大。温度对壳聚糖吸附溴百里香酚蓝的影响较小,随着温度的升高,吸附能力降低。计算得到吸附过程的热力学参数△G^0,△H^0和△S^0分别为-19.74 kJ/mol(303 K)、-2.004kJ/mol和58.80J/(mol·K),表明壳聚糖对溴百里香酚蓝的吸附是一个自发的放热过程。The effects of initial pH value, solution temperature on the adsorption of bromthymol blue were examined. The adsorption properties and mechanism were studied with the help of adsorption isotherms. The re- suit showed that the maxium adsorption capacity for bromthylmol blue on chitosan was obtained at pH value of 3.4. The effect of solution temperature on the adsorption of bromthylmol blue was less. The adsorption eapaeity of bromthylmol blue decreased with the increase of temperature. Thermaldynamic parameters such as △G^0, △ H^0 and △S^0 were - 19.74 kJ/mol （ 303 K）, - 2. 004 kJ/mol and 58.80 J/（ mol · K） respectively, showing that the adsorption of bromthylmol blue onto chitosan was spontaneous and exothermie process.

关 键 词：壳聚糖 溴百里香酚蓝 吸附机理 热力学 

分 类 号：TQ028.15[化学工程]