摘要
研究了活性炭分别对铅、镉、铜及锌离子的吸附作用,研究了pH值、温度及活性炭的投加量等因素对吸附效果的影响。结果表明,当pH>5时对四种离子的去除率均达到98%以上,能达到很好的吸附。低温有利于吸附的进行。随着活性炭的增加,重金属离子的去除率增加,而且铜离子的活性炭最佳用量是0.3000g,铅、镉和锌的活性炭最佳用量均为1.000g。随着吸附时间的增加,去除率上升。铜、铅、镉和锌离子的吸附平衡时间分别为3.5h、1h、1.5h和1.5h。铜离子的吸附符合Langmuir等温模式,而锌、铅和镉离子的吸附符合Freundlich等温模式。
The adsorption of activated carbon for the heavy metals such as Pb, Cd, Cu and Zn has been studied. And the effect of pH, temperature, dosage of activated carbon on the adsorption is investigated. The results showed that heavy ion removals were above 98% when pH was above 5 Low temperature was beneficial to the adsorption. Heavy metal removal rates increased with activated carbon. For Cu, the optimum dosage of activated carbon was 0. 3000 g. For Pb, Cd and Zn , they were 1.000 g. The removal rates also increased with time. The adsorption equilibrium time of Cu, Pb, Cd and Zn was 3.5 h, 1 h, 1.5 h, 1.5 h, respectively. Langmuir isothermal mode could explain the adsorption of Cu. The adsorptions of Pb, Cd and Zn met Freundlich isothermal mode.
出处
《天津化工》
CAS
2013年第2期1-3,7,共4页
Tianjin Chemical Industry
基金
天津城市建设学院学生科技活动资助项目基金
天津市应用基础及前沿技术研究计划资助项目
关键词
活性炭
重金属
吸附
activated carbon
heavy metals
adsorption
