甲壳素对碱性橙Ⅱ染料吸附条件及机理的研究  

Study on adsorption conditions and mechanism of chitin on basic orange Ⅱ

作　　者：严雨晴 张毅 严恒 谢卫红 YAN Yuqing;Zhang Yi;YAN Heng;XIE Weihong(College of Biotechnology and Food,Hubei University of Technology,Wuhan 430068;Hubei Provincial Institute for Food Supervision and Test,Wuhan 430075)

机构地区：[1]湖北工业大学生物工程与食品学院,武汉430068 [2]湖北省食品质量安全监督检验研究院,武汉430075

出　　处：《分析试验室》2021年第5期558-562,共5页Chinese Journal of Analysis Laboratory

基　　金：湖北省食品质量安全监督检验研究院科技项目(ZZLX2015015);湖北工业大学“产品质量工程”跨学科研究院开放课题(00021)资助。

摘　　要：研究了pH对初加工甲壳素(A)和商品甲壳素(B)吸附性能的影响,通过加入电解质NaCl和表面活性剂十二烷基硫酸钠(SDS)探究了p H影响甲壳素吸附性能的原因,并对吸附机理做了初步探讨。结果表明:甲壳素A和甲壳素B在pH 4.0时对碱性橙Ⅱ吸附效果最佳;加入0.1 mol/L NaCl后,在低pH条件下会对甲壳素与碱性橙Ⅱ之间的静电作用产生一定影响;加入0.01 mol/L SDS后,甲壳素A的吸附效果不受pH的影响,而pH对甲壳素B吸附效果的影响基本不变。静电吸引、氢键和疏水作用是甲壳素吸附碱性橙Ⅱ的几种作用力,随着pH的改变,其主要作用力会发生变化。The effect of pH on the adsorption performance of primary processed chitin( A) and commercial chitin( B) were studied. The reason of p H affecting the adsorption performance of chitin was investigated by adding electrolyte( NaCl) and surfactants( SDS),and the adsorption mechanism was preminarily discussed.The results showed that chitin A and chitin B presented the best adsorption capacity for basic orange Ⅱ at pH4. 0. In the presence of 0. 1 mol/L NaCl,effect on the electrostatic interaction between the chitins and basic orange Ⅱ was observed at low pH. Upon adding 0. 01 mol/L SDS,chitin A displayed no pH dependence on the adsorption of basic orange Ⅱ,while the adsorption capacity of chitin B for the dye was still p H dependent.Electrostatic attraction,hydrogen bonding and hydrophobic interaction were the forces involved in the adsorption of chitin for basic orange II,the main force varied with different pH values.

关 键 词：甲壳素 碱性橙 吸附条件 吸附机理 

分 类 号：TS207.3[轻工技术与工程—食品科学]