CAJ | 학술논문

利用3-巯丙基三甲氧基硅烷对介孔材料MCM-41进行表面修饰，采用扫描电子显电镜（SEM）、透射电镜（TEM）和X-射线衍射分析仪（XRD）等方法对样品进行表征．并研究了巯基化MCM-41对水中Hg （Ⅱ）的吸附性能，考察了初始浓度、接触时间、温度、pH值和氯离子对吸附性能的影响．结果表明：Hg（Ⅱ）在巯基化MCM-41上的吸附符合假二级动力学模型，吸附等温线符合Langmuir模型；温度升高有利于巯基化MCM-41对Hg（Ⅱ）的吸附，温度为298和308 K时的饱和吸附容量分别为219和258 mg/g，吸附为吸热过程；溶液pH（2．0～7．6）基本不影响Hg（Ⅱ）的吸附，巯基化MCM-41对Hg（Ⅱ）的吸附随氯离子浓度的增加而降低．脱附实验表明， Hg（Ⅱ）在巯基化MCM-41上结合力较强．
이용3-구병기삼갑양기규완대개공재료MCM-41진행표면수식，채용소묘전자현전경（SEM）、투사전경（TEM）화X-사선연사분석의（XRD）등방법대양품진행표정．병연구료구기화MCM-41대수중Hg （Ⅱ）적흡부성능，고찰료초시농도、접촉시간、온도、pH치화록리자대흡부성능적영향．결과표명：Hg（Ⅱ）재구기화MCM-41상적흡부부합가이급동역학모형，흡부등온선부합Langmuir모형；온도승고유리우구기화MCM-41대Hg（Ⅱ）적흡부，온도위298화308 K시적포화흡부용량분별위219화258 mg/g，흡부위흡열과정；용액pH（2．0～7．6）기본불영향Hg（Ⅱ）적흡부，구기화MCM-41대Hg（Ⅱ）적흡부수록리자농도적증가이강저．탈부실험표명， Hg（Ⅱ）재구기화MCM-41상결합력교강．
MCM-41 was modified by 3-mercaptopropyltrimethoxysilane to remove Hg (Ⅱ) from aqueous solution.The thiol-functionalized MCM-41 obtained was characterized by scanning electron microscopy (SEM), transmission electron microscopy ( TEM) and X-ray diffraction ( XRD).In addition, the influences of the initial solution concentration, contact time, temperature, pH and con-centration of chloride ion on the adsorption ability of thiol-functionalized MCM-41 for Hg (Ⅱ) in water were investigated.The results show that the adsorption of Hg (Ⅱ) by thiol-functionalized MCM-41 accords with the pseudo-second-order kinetic model and the adsorption isotherm can be fit-ted well by the Langmuir model.The increase of temperature benefits the adsorption of Hg(Ⅱ) by thiol-functionalized MCM-41, indicating that the adsorption is endothermic.The maximum adsorp-tion capacities are 219 and 258 mg/g at the temperatures of 298 and 308 K respectively.The solution pH (2.0 to 7.6 ) has no significant effect on the adsorption of Hg (Ⅱ) by thiol-functionalized MCM-41.However, the adsorption capacity decreases with the increase in the chloride ion concen-tration.Finally, the results of desorption experiments show that the thiol-functionalized MCM-41 has a relatively high affinity to Hg(Ⅱ) .