柚皮粉对水中Pb(Ⅱ)的吸附性能研究

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...

Grapefruit Husk Powders Adsorption for Lead Ions in Water

The adsorption removal of lead ions in water by grapefruit husk powders was investigated,and the influence of pH value,shaking time,dosage 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.