文献类型： 外文期刊
第一作者： Liu, Jiang
作者： Liu, Jiang;Huang, Hui;Huang, Rong;Zhang, Jinzhong;Hao, Shuoshuo;Shen, Yuanyuan;Chen, Hong;Zhang, Jinzhong;Chen, Hong
作者机构：
关键词： CPB;modified zeolite;adsorption mechanism;mercury adsorption
期刊名称：WATER ENVIRONMENT RESEARCH （ 影响因子：2.5； 五年影响因子：2.8 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： A systematic study was carried out to analyze the effects of mercury(Ⅱ) adsorption by surface modified zeolite (SMZ) and adsorption mechanism. Cetylpyridinium bromide (CPB) was used to prepare SMZ. The characterization methods by means of powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscope (SEM) showed that both the surface and internal zeolite were covered with CPB molecules, but the main binding sites were surface. Results showed that the organic carbon and cation exchange capacity of the SMZ were 7.76 times and 4.22 times higher than those of natural zeolite (NZ), respectively. Zeta potentials before and after modification were measured at -7.80 mV and -30.27 mV, respectively. Moreover, the saturation adsorptive capacity of SMZ was 16.35 times higher than NZ in mercury-containing wastewater. The possible mechanisms of mercury elimination were surface adsorption, hydro-phobic interaction, ion exchange, electricity neutralization. The adsorption process was affected little by competitive ions.
分类号： X5
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