摘要
采用鼠尾藻对重金属Pb2+进行吸附,研究了溶液不同pH、温度、投入量对鼠尾藻吸附特性的影响,并探讨鼠尾藻吸附的动力学研究。结果表明,随着pH的增加,鼠尾藻吸附重金属Pb2+的吸附率也在增加,当pH为6时,吸附率达到最大状态,若pH继续升高,则吸附率开始降低;当温度小于30℃时,温度提高,吸附率也会增强,当温度到30℃左右时,吸附率达到最大值,当温度大于30℃时,温度升高,吸附率会逐渐降低;鼠尾藻投入量增加,吸附率也逐渐升高,投入量由1 g/L增至20g/L时,吸附率则由33%迅速升至93%,当投入量为20 g/L时,吸附率达到了最大值,接近于平衡状态,再增加投入量,吸附率基本不再发生变化;鼠尾藻吸附动力学过程符合二级动力学模型。
By using Sargassum thunbergii^s adsorption to the heavy metals lead ion, the affection of Sargassum thunbergii＇s adsorption under different pH , temperatures and inputs was studied, and the kinetics of adsorption by Sargassum thunbergii was investigated. The results showed that, the rate of he Sargassumg adsorption to heavy metals lead ions added when the pH increased, when the pH was 6, the adsorption rate was the biggest, the adsorption rate begins reduce if the pH still increased. When the temperature was lower than 30~C, the rate increased if the temperature still increase, the rate was the biggest when the temperature near 30℃, when the tem perature was higher than 30℃, the rate reduced if the temperature still increase. The adsorption rate increased while the inputs in creased, when the inputs increased from 1 g/L to 2 g/L, the rate would increase quickly from 33% to 93%, until the inputs reach to 20 g/L, the adsorption rate got the biggest number, and close to equilibrium state, and would not change basically even more inputs, the Sarassumg adsomtion kinetics comply with the second-order kinetic model.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2013年第6期893-895,910,共4页
Marine Environmental Science
基金
浙海渔计[2011]127号
关键词
鼠尾藻
重金属
PH
温度
动力学
Sargassum thunbergii
heavy metals
pH
temperature
kinetics
