摘要
采用十六烷基三甲基溴化铵(CTMAB)对膨润土进行改性,用双硫腙对其表面进行修饰,制备了廉价的新型固态吸附剂。以火焰原子吸收为检测手段,研究了该吸附剂对水中Co(Ⅱ)的吸附性能,建立了双硫腙修饰有机膨润土吸附富集,火焰原子吸收法测定水中痕量Co(Ⅱ)的新方法,结果表明,用CTMAB改性后,双硫腙可牢固地负载于膨润土上,制备的固态吸附剂对水中Co(Ⅱ)具有较强的吸附能力;吸附量受介质的pH值和吸附时间的影响;吸附在双硫腙修饰有机膨润土上的Co(Ⅱ)可用1%的EDTA溶液洗脱。应用于自来水和河水中痕量Co(Ⅱ)的测定,取得令人满意的结果。
A sort of cheap sorbent was prepared through modifying organobentonite with dithizone.By means of determination of flame atomic absorption spectrometry(FAAS),the adsorption capability of the modified organobentonite by dithizone for Co(Ⅱ) in water was investigated.The results showed that dithizone could be immobilized on the bentonite firmly after treated by CTMAB.The Co(Ⅱ) in water could be adsorbed quantitively on the modified organobentonite by dithizone when the pH value is 5~7.The adsorbed quantitively...
出处
《广东微量元素科学》
CAS
2008年第1期57-60,共4页
Trace Elements Science
基金
辽宁省教育厅科学技术研究项目(编号:05L367)
