负载型还原性球形纤维素吸附剂的制备及表征

Preparation and Characterization of A Loaden Reductive Spherical Cellulose Adsorbent

以自制球形纤维素珠体-AN-AM接枝共聚物MSCB为载体,通过液相还原法负载零价铁和纳米氢氧化镁,制备出负载型还原性球形纤维素吸附剂MS-ZIM,考察了零价铁及氧化镁质量的影响。结果表明,当MSCB用量为2.0 g,m(MSCB):m(Fe)=1:1,m(MS-ZI):m(MgO)=5:1时,制得的吸附剂含水率为88.3%,粒径主要分布在1.2~1.6 mm的范围内,比表面积为358.2 m^2/g。利用ESEM、EDS、ICP、FT-IR进行表征,证实MSCB表面成功负载了零价铁和纳米氢氧化镁,Fe元素含量为21.4%,Mg元素含量为2.98%。

A loaden reductive spherical cellulose adsorbent , denoted as MS-ZIM, was prepared using the graft copolymerization of acrylonitrile and acrylamide （MSCB） as carrier and zero-valent Fe and nano Mg （OH）2 as loaden materials, by adopting aqueous reducing technique , and the effect of the dosages of zero-valent Fe and nano Mg （ OH） 2 was studied.The results showed that the adsorbent with 88.3%of moisture content , 1.2 to 1.6 mm of particle size range , 358.2 m2/g of specific surface area could be obtained under the optimal conditions , i.e., 2.0 g of MSCB dosage , 1：1 of the mass ratio of MSCB and Fe as well as 5：1 of the mass ratio of MS-ZI and MgO.The characterization results of ESEM, EDS, ICP and FT-IR validated that zero-valent Fe and nano Mg（OH）2 were successfully loaded on MSCB , and Fe element content and Mg element content was 21.4%and 2.98%respectively.