摘要
研究国产泥炭在间歇吸附器内对Ｃｕ、Ｚｎ、Ｐｂ的吸附．通过等温吸附动力学研究确定接触时间、ｐＨ值、被吸附物的初始浓度、温度对吸附的影响．吸附达到平衡所必需的接触时间为１ｈ，ｐＨ值最佳范围为４５～６０．Ｃｕ、Ｚｎ、Ｐｂ的吸附等温式可用Ｆｒｅｕｎｄｌｉｃｈ和Ｌａｎｇｍｕｉｒ模型描述．其吸附过程为粒内扩散控制。
The batch adsorption of copper, zinc and lead onto Chinese local peat has been studied. Adsorption isotherm kinetic studies were conducted to determine the effects of contact time, pH, initial concentration of the adsorbate, and temperature on adsorption. It was found that a contact time of 1 h was necessary for the adsorption to reach equilibrium. The process was pH dependent, the optimum pH value is in the range of 4.5 to 6.0. The isotherms for the adsorption of copper, zinc and lead were described well by both the Freundlich and the Langmuir models. The adsorption process was found to be controlled by intraparticle diffusion, and to be exothermic.\=
出处
《沈阳化工学院学报》
1999年第2期131-138,共8页
Journal of Shenyang Institute of Chemical Technolgy
关键词
泥炭
铜
锌
铅
吸附
溶液
peat
\ copper
\ zinc
\ lead
\ adsorption
