植酸-甲基丙烯酸二甲氨基乙酯-羧甲基纤维素钠交联聚合物的制备及染料吸附性能

Preparation and dye adsorption properties of phytic acid-dimethylaminoethyl methacrylate-sodium carboxymethyl cellulose crosslinked polymer

本文以甲基丙烯酸二甲氨基乙酯(DMAEMA)为原料,羧甲基纤维素钠(CMC)为骨架,改性植酸(PA)为交联剂制备了一种新型的染料吸附剂(PAGDC)。实验结果表明:PAGDC具有pH响应特性,并且对阴离子染料活性艳红24(RR24)和阳离子染料品红碱性(FB)都有很好的吸附性能,最大吸附容量分别为1867.63 mg/g(RR24)和475.99 mg/g(FB),最高去除率分别为98%(RR24)和74%(FB);PAGDC的吸附等温线和动力学分别与Langmuir等温线和拟二级动力学模型非常吻合;吸附解析测试发现PAGDC可以再生重复使用。表明PAGDC是一种很有实际应用前景的染料吸附剂。

In this paper,a new high-efficiency adsorbent(PAGDC)was prepared via polymerization of dimethylaminoethyl methacrylate(DMAEMA)by employing sodium carboxymethyl cellulose(CMC)as the backbone and phytic acid(PA)as crosslinker.Experiments show that PAGDC is pH-sensitive and has good adsorption performance for Reactive Red 24(RR24,Anionic dye)and Fuchsin Basic(FB,Cationic dye).The maximum adsorption capacity is 1867.63 mg/g(RR24)and 475.99 mg/g(FB),the highest removal rates were 98%(RR24)and 74%(FB).In addition,the adsorption isotherms and kinetics of PAGDC fit well with the Langmuir isotherm and pseudo-second-order kinetic models,respectively.The adsorption-desorption results indicate that PAGDC is a promising adsorbent which can be regenerated and reused.