改性硅藻土对Pb(Ⅱ)的吸附作用  

Adsorption of Modified Diatomite on Pb^(2+)

作　　者：刘频[1] 赵黔榕[1] 袁朗白[2] 马晓涛 

机构地区：[1]云南师范大学化学化工学院,昆明650092 [2]云南大理学院生命科学及化学系,大理671000 [3]云南省石林县鹿阜一中,石林652200

出　　处：《云南化工》2003年第5期11-13,共3页Yunnan Chemical Technology

摘　　要：采用云南腾冲硅藻土 ,将其进行化学改性 ,系统研究了改性硅藻土对水溶液中Pb2 + 的吸附作用。讨论了吸附剂用量、溶液pH值、作用时间等条件对吸附性能的影响 ,结果表明 :改性硅藻土对Pb2 + 的吸附作用明显优于原土 ,且吸附符合Freundlich方程。吸附后溶液残留Pb2 + 质量浓度为 0 .74mg·L- 1 。Modified diatomite was prepared from that of Tengchong and its adsorption on Pb 2+ in aqueous solution was studied. Effect of the adsorbent dosage, pH value and time on the adsorption capability was discussed. Result showed that properties of the modified diatomite were excellent and the adsorption isotherm accorded with Freundlich equation. After treating with the modified diatomite, concentration of residual Pb 2+ lowered to 0.74 mg·L -1 and reached the state standard of drainage.

关 键 词：化学改性 硅藻土 铅离子 吸附作用 吸附剂 

分 类 号：TQ424.22[化学工程]