硅藻土/WO-PAM复合吸附剂制备及去除铯性能研究

Synthesis of Diatomite/WO-PAM Composite Adsorbent and Its Performance for Cesium Removal

以硅藻土、丙烯酰胺/乙烯基阳(阴)离子单体共聚物为原料,以N,N-亚甲基双丙烯酰胺为交联剂、偶氮二异丁腈为引发剂,采用化学合成法制备了两种硅藻土/WO-PAM复合吸附剂。采用SEM、EDS、BET、FT-IR等对样品进行了表征,研究了样品对133Cs吸附规律。样品比表面积分别为88 m2/g、92 m2/g,133Cs的最大容量分别为165 mg/g、217 mg/g,初始质量浓度为10 mg/L的含133Cs污水,一次吸附去除率均达99%。

In this work, two composite absorbents, including diatomite/WO-cation PAM and diatomite/WO-anion PAM were prepared via chemical synthesis method by using N, N-methylene bis acrylamide as crosslinking agent and azodiisobutyronitrile as evocating agent. The samples were characterized by scanning electron microscope （SEM）, energy-dispersive X-ray spectroscopy （EDS）, Brunauer-Emmett-Teller （BET）, and Fourier transform infrared spectrometry （FT-IR）. With CsCl as the source of133Cs, the adsorption behavior for133Cs of the two samples was investigated. It was found that the surface areas of the two samples were 88 and 92m2/g, respectively, and the maximum adsorption capacity for133Cs were 165 and 217mg/g, respectively. As initial concentration of133Cs was 10mg/L, the removal efifciency of both the diatomite/WO-cation PAM and diatomite/WO-anion PAM for133Cs was 99%.