作　　者： ; ; ; ; ; ;

机构地区： 广东工业大学环境科学与工程学院

出　　处： 《电镀与精饰》 2011年第12期35-39,共5页

摘　　要： 用柚皮粉进行了吸附去除水中Pb(Ⅱ)的模拟实验研究。考察了pH、吸附时间、柚皮粉质量浓度和Pb(Ⅱ)初始质量浓度等因素对吸附效果的影响,探究了其吸附动力学及吸附规律。结果表明,pH、吸附时间、柚皮粉质量浓度和Pb(Ⅱ)初始质量浓度、温度等因素对柚皮粉吸附水中Pb(Ⅱ)有显著影响。适宜的吸附条件为:pH 5.3～6.0,t为2.5 h,8 g/L柚皮粉,Pb(Ⅱ)初始质量浓度≤50 mg/L,θ为30℃。在该条件下,Pb(Ⅱ)的去除率可达到90%以上。柚皮粉对水中Pb(Ⅱ)的吸附符合动力学二级反应,等温吸附规律可用Freundlich、Langmuir和Temkin模式较好地描述。 The adsorption removal of lead the influence of pH value, shaking time, ions in dosage water by grapefruit husk powders was investigated, and of grapefruit husk and initial concentration of lead ions on the adsorption effect was also determined. Meanwhile, the adsorption kinetics and mechanism were explored. The results show that the factors of pH value, shaking time, dosage of grapefruit husk and initial concentration of grapefruit husle powderr for lead ions have a remarkably effect on the adsorption of grapefruit husk powders for lead ions. The suitable conditions are pH value of 5.3 - 6.0, shaking time of 1.5 hours, dosage of grapefruit husk powder of 8 g/L, initial concentration of Pb（ Ⅱ ） of 50 mg/L and temperature of 30℃. Under this suitable condition, the removal rate of Pb（ Ⅱ ） could be reached more than 90%. The adsorption kinetics of lead ions by grapefruit husk obeys pseudo-second-order equation, and the isothermal adsorption could be described by Freundlich, Langmuir and Temkin models.

关 键 词： 柚皮粉 吸附

领　　域： [环境科学与工程]