皮胶原纤维固载Zr(IV)对水体中苯羧酸的吸附特性

制备皮胶原纤维固载Zr(IV)吸附剂(ZLCF),并考察ZLCF对水体中苯甲酸(BA)、邻苯二甲酸(o-PA)、对苯二甲酸(p-PA)和间苯二甲酸(m-PA)的吸附特性.研究表明:这4种苯羧酸的吸附平衡同时符合Langmuir和Freundlich方程,但随着它们的羧基数量和位置的不同,其吸附容量也随之变化.总体看,ZLCF对所研究的苯羧酸均具有较大的吸附容量.当苯羧酸溶液(10 m1)的初始浓度为6 mmol/L、吸附温度为293 K时,ZLCF(0.05 g)对BA、o-PA、m-PA和p-PA的吸附容量分别达0.4616、0.5892、0.4912和0.3138 mmol/g.吸附动力学研究表明:BA的吸附符合拟一级速率方程,边界层扩散为主控步骤;而o一PA、m-PA和p-PA的吸附符合拟二级速率方程,化学吸附为主控步骤.

Adsorption Characteristics of Benzene Carboxylic Acids from Aqueous Solution by Zr(IV)-loaded Collagen Fiber

A novel adsorbent,Zr(IV)-loaded collagen fiber (ZLCF),was prepared and its adsorption characteristics to benzoic acid (BA),o-phthalic acid (o-PA),p-phthalic acid (p-PA) and m-phthalic acid (m PA) from aqueous solution were investigated.It was found that the adsorption equilibrium data of these benzene carboxylic acids can be well fitted by both Langmuir and Freundlich models.But the adsorption capacity of the benzene carboxylic acids changes with the number and position of carboxyl groups on benzene ring.In...