【摘要】 用2-巯基乙胺盐酸盐(MEA)与十六烷基三甲基溴化铵(HDTMA)复合改性内蒙钙基膨润土(IMB),制得吸附材料MEA-HDTMA-IMB.X射线衍射(XRD)、红外光谱(FTIR)、差热-热重分析(TG-DTA)和比表面积分析(N2-BET)等表征结果表明,复合改性膨润土的比表面积和层间距显著增大.吸附研究发现,MEA-HDTMA-IMB能同时有效吸附混合水溶液中的有机污染物对硝基苯酚和重金属铜,其对水中有机物的吸附机理以分配作用为主,其吸附能力强于用季铵盐阳离子单一改性的有机膨润土HDTMA-IMB;对水中重金属的吸附主要为络合反应,其吸附能力与用巯基铵阳离子单一改性的膨润土MEA-IMB相当.更多还原

【Abstract】 A novel sorbent,MEA-HDTMA-IMB,was prepared by modifying Ca-bentonite(IMB) obtained from Inner Mongolia of China with both 2-mercaptoethylamine hydrochloride(MEA) and hexadecyltrimethy-lammonium bromide(HDTMA).The sample was characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),thermal analysis(TG-DTA),and specific surface area(N2-BET).The results indicated that both specific surface area and basal spacing of MEA-HDTMA-IMB were increased significantly.The performance of this sorbent showed that MEA-HDTMA-IMB could sorb p-nitrophenol and copper simultaneously from the mixed solution.The sorption of organic pollutant,p-nitrophenol,onto MEA-HDTMA-IMB was better than HDTMA-IMB and controlled by a partition process.The sorption of heavy metal,Cu2+,onto MEA-HDTMA-IMB was dominated by the formation of complexes and in close proximity to MEA-IMB.更多还原