粉煤灰合成沸石对Cr^(3+)的吸附性能研究  

Research on the Adsorption Properties of Cr^(3+) by Synthesis of Zeolite from Fly Ash

作　　者：程婷[1] 刘海霞[1] 陈晨[2] 王志良[3] 

机构地区：[1]江苏城市职业学院城市科学系,江苏南京210017 [2]江苏科技大学生物与化学工程学院,江苏镇江212018 [3]江苏省环境科学研究院环境工程重点实验室,江苏南京210036

出　　处：《粉煤灰综合利用》2014年第3期15-18,共4页Fly Ash Comprehensive Utilization

基　　金：江苏省环境工程重点实验室开放课题(KF2013001);江苏省高校自然科学研究资助项目(13KJB610005);江苏科技大学引进人才科研启动项目(35211107)

摘　　要：利用粉煤灰合成沸石吸附重金属Cr3+,探讨吸附剂量、初始pH值以及反应温度对Cr3+吸附效果的影响,同时进行吸附等温线和吸附动力学的数据模拟。结果表明:沸石投加量、初始pH值以及反应温度均对Cr3+的去除效果影响显著。随着吸附剂投加量的不断增大,Cr3+去除效果不断提高,饱和吸附量逐渐减小。初始pH值为4时沸石吸附Cr3+的去除率为100%。反应温度的上升不利于沸石对Cr3+吸附,沸石对Cr3+的吸附效果随着反应温度的升高逐渐降低。沸石吸附Cr3+的过程符合Freundlich吸附等温式;准二级反应动力学方程能较好描述沸石对Cr3+的吸附行为。The experiment was conducted to examine the adsorption properties of Cr3＋ through synthesizing zeolite from coal fly ash. The adsorbent dosage, initial pH and the reaction temperature were investigated in the tests. The adsorption isotherm and kinetics equation was also discussed. The resuhs showed that, the adsorbent dosage, initial pH and the reaction temperature had significant effect on the removal of Cr3＋. With the increasing of the adsorbent dosage, the removal rate of Cr3＋ was improved, and the saturated adsorption capacity was decreased gradually. The removal rate of Cr3＋ was 100% when the initial pH was 4. Increasing the reaction temperature was negtive to the adsorption of Cr3＋. The removal of Cr3＋ decreased gradually with the raise of reaction temperature. The adsorption process of Cr3＋ accorded with Freuudlich adsorption isotherm. In addition, the reaction of adsorption on zeolite to Cr3＋ matched to the pseudo-second class reaction kinetics model.

关 键 词：三价铬离子 粉煤灰 沸石吸附 

分 类 号：TQ649.45[化学工程—精细化工]