改性斜发沸石吸附OH-后的再生改型及吸附性能研究.pdf

河北工业大学
硕士学位论文
改性斜发沸石吸附OH-后的再生改型及吸附性能研究
姓名:周伟
申请学位级别:硕士
专业:化学工艺
指导教师:张林栋
2011-04
河北工业大学硕士学位论文


改性斜发沸石吸附OH-后的再生改型及吸附性能研究

摘要

本文研究了在 20℃条件下进行钙改性斜发沸石和镁改性斜发沸石吸附OH-的动静态试
验对比,结果表明动态试验改性斜发沸石对OH-的吸附能力明显要强于静态试验的改性斜
发沸石。并进一步研究了 10℃、20℃、30℃条件下改性斜发沸石对不同碱溶液中OH-的吸
附能力,结果表明温度的升高有利于改性斜发沸石对碱溶液中OH-的吸附,即这个过程属
于吸热过程。随着碱溶液中OH-浓度的升高,改性斜发沸石吸附的OH-的含量逐渐增多,且
镁型斜发沸石比钙型斜发沸石吸附OH-的含量多。
选择盐酸和硫酸作为解吸剂,研究了解吸剂浓度、解吸剂类型、解吸温度对钙型斜发
沸石和镁型斜发沸石解吸效果的影响,确定了最佳解吸温度为 50℃;盐酸的解吸效果强于
硫酸;对于吸附OH-的钙型斜发沸石,盐酸和 1/2 硫酸最适浓度分别为 mol/L、 mol/L,
且对K+的吸附量分别为 mg/g沸石、 mg/g沸石。而对于吸附OH-的镁型斜发沸石,
盐酸和 1/2 硫酸最适浓度分别为 mol/L、 mol/L,对K+的吸附量分别为 mg/g沸
石、 mg/g沸石。

关键词:斜发沸石,改性,吸附,OH-,解吸,再生

i
改性斜发沸石吸附 OH-后的再生改型及吸附海水 K+的研究


STUDY ON REGENERATION-MODIFICATION AND
ADSORPTION PROPERTY OF MODIFIED CLINOPTILOLITE
AFTER ADSORBING OH-

ABSTRACT

This paper studied parison between dynamic and static experiments for the
adsorbing OH- of Ca-modified and Mg-modified clinoptilolite at 20℃, finding that in dy-
namic experiment the modified clinoptilolite obviously had better capability of adsorbing
OH- than that in static experiment. Furthermore, at 10℃℃,20 and 30 ℃ it respectively st-
udied the adsorbing OH- capability of Ca-and Mg-modified clinoptilolite in different alka-
li solutions of different concentrations, and the results showed that increasing of tempera-
ture was good for adsorbing OH- in alkali solutions with modified clinoptilolite. In other
words, this process belonged to endothermic reaction. Along with the rising concentration
of OH- in alkaline solution, the modified clinoptilolite gradually absorbed more OH-,and
Mg-modified clinoptilolite could absorb more OH- than Ca-modified clinoptilolite.
Using hydrochloric acid and sulfuric acid as desorption agent, the influence of deso-
rption agent concentration,the type of desorption agent and the desorption temperature on
the desorption results of Ca-modified and Mg-modified