摘要
研究了云南沱茶在不同的时间、浓度、温度、ｐＨ条件下，自水溶液中吸附Ｃｅ（Ⅳ）离子的特性，并分别讨论了阴离子表面活性剂（ＳＤＳ），阳离子表面活性剂（ＣＰＣ），非离子表面活性剂（ＯＰ）对沱茶吸附Ｃｅ（Ⅳ）离子的影响，结果表明，在一定条件下，沱茶对铈（Ⅳ）的吸附量可达７９５ｍｇ／ｇ求出了Ｌａｎｇｍｕｉｒ和Ｆｒｅｕｎｄｌｉｃｈ方程中的吸附参数，计算出等量吸附热。
Adsorption characteristics to Ce(Ⅳ) ion of Yunnan bowl tea at different times, concentrations, temperatures and pH conditions in aqueous solution were studied The effects of anion surfactant (SDS), cation surfactant (CPC) and nonionic surfactant (OP) on the tea′s adsorption to Ce(Ⅳ) ion were examined respectively Experimental results show that in definite condition the adsorption amount of bowl tea to Ce(Ⅳ) ion counld reach 7 95 mg/g The adsorption parameters in Langmuir and Freundlish formulas were calculated The adsorption heat of equal amount was gained It shows that this adsorption has Langmuir′s monomolecula layer adsorption characteristics featuring chemical adsorption The adsorption mechanism of bowl tea to Ce(Ⅳ) ion was disscussed
关键词
沱茶
吸附
表面活性剂
铈离子
bowl tea
adsorption
cerium (Ⅳ) ion
surfactant
