CAJ | 학술논문

SBA?15是具有较大孔径和良好的热稳定性的多孔硅基分子筛，在吸附分离领域有着广阔的应用前景。合成了介孔硅基材料SBA?15，对其进行了TEM和FTIR表征，并进行了SBA－15对铯的吸附性能研究，探讨了不同的pH值，铀初始浓度，吸附材料用量，反应时间以及离子强度等条件对吸附性能的影响。结果表明，在pH＝6，吸附时间120 min，铯初始浓度为40 mg／L时，SBA－15对铯的吸附容量达到26．31 mg／g。较高的pH值有利于铯的吸附，而离子强度对吸附明显有抑制作用。吸附等温线拟合结果符合Langmuir等温模型，拟一级动力学模型能较好地描述反应动力学。
SBA?15시구유교대공경화량호적열은정성적다공규기분자사，재흡부분리영역유착엄활적응용전경。합성료개공규기재료SBA?15，대기진행료TEM화FTIR표정，병진행료SBA－15대색적흡부성능연구，탐토료불동적pH치，유초시농도，흡부재료용량，반응시간이급리자강도등조건대흡부성능적영향。결과표명，재pH＝6，흡부시간120 min，색초시농도위40 mg／L시，SBA－15대색적흡부용량체도26．31 mg／g。교고적pH치유리우색적흡부，이리자강도대흡부명현유억제작용。흡부등온선의합결과부합Langmuir등온모형，의일급동역학모형능교호지묘술반응동역학。
SBA?15 is a porous silicon molecular sieve with large aperture and good thermal stability. It shows a promising prospect in the field of separation. In this study,mesoporous silica SBA?15 was synthesized and employed to investigate cesium sorption from aqueous solution. The synthesized SBA?15 was characterized with TEM and FTIR.The effects of pH,cesium initial concentration,adsorbent dosage,contact time and ionic strength on the sorption of cesium were studied in details.The experimental results showed that the sorption e?quilibrium could be achieved in 120 min at pH=6.The cesium sorption capacity was found to be 26.31 mg/g at the cesium initial concentration of 40 mg/L.The sorption isotherm and kinetics were investigated.The sorp?tion equilibrium data was well fitted with Langmuir isotherms,and the sorption kinetics was well defined by the Pseudo?first?order model.