载Fe(Ⅲ)丝瓜络纤维吸附磷酸根研究  

Adsorption Performance of Phosphate on Luffa Fibers Modified with Fe(Ⅲ)

作　　者：郭翔[1,2,3] 王治科[1,2,3] 

机构地区：[1]河南师范大学环境学院 [2]河南省环境污染控制重点实验室 [3]黄淮水环境与污染防治省部共建教育部重点实验室,河南新乡453007

出　　处：《河南师范大学学报（自然科学版）》2014年第5期99-104,共6页Journal of Henan Normal University(Natural Science Edition)

基　　金：河南省基础与前沿技术研究计划项目(122300410271)

摘　　要：采用静态吸附试验,研究了pH、吸附剂投放量、温度、吸附时间对载Fe（Ⅲ）丝瓜络纤维吸附水中磷酸根性能的影响.结果表明,在pH为4.00~6.00的范围内吸附量较大,即当磷酸根以H2PO4-的形式存在时有利于吸附.载Fe（Ⅲ）丝瓜络纤维对磷酸根的吸附符合Langmuir吸附等温方程及拟二级动力学方程.根据Arrhenius方程得出该吸附过程的经验活化能为17.81kJ/mo1,属于物理吸附.溶液中存在的Cl-,NO3-、SO42-及CO32-对磷酸根的吸附影响不明显,用5.00mL 50g/L NaOH溶液进行解吸,回收率达到97.65%.The pH, amount of adsorbent, temperature and adsorption time on the adsorption effect were studied in detail through static adsorption test. The results showed that the maximum phosphate adsorption was observed in the pH range of 4.0--6.0, which implied that H2 PO4- favored the adsorption on Fe（ III） modified luffa fibers. The adsorption behaviors of phosphate on Fe（ III） modified luffa fibers accord with Langmuir adsorption isotherms equation, and also meet the pseudo second-order kinetic equation. According to Arrhenius equation, the apparent activation energy of the adsorption was 17.81 kJ/ mol, which indicated that the adsorption was physical adsorption. The co-existing anions such as Cl- , NO3- , SO4 2- and CO3 2- in the solution had little effect on the adsorption of phosphate on Fe（ III ） modified luffa fibers. The phosphate adsorbed could be desorbed by 5.00 mL 50 g/L sodium hydroxide solution and the recovery was 97.65%.

关 键 词：载Fe(Ⅲ)丝瓜络纤维 吸附 磷酸根 

分 类 号：X712[环境科学与工程—环境工程]