| 垃圾焚烧模拟烟气中镉的动态吸附实验 |
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| 引用本文： | 卢欢亮,王伟.垃圾焚烧模拟烟气中镉的动态吸附实验[J].环境化学,2009,28(1). |
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| 作者姓名： | 卢欢亮 王伟 |
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| 作者单位： | 1. 广州市环境卫生研究所,广州,510170
2. 清华大学环境科学与工程系,北京,100086 |
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| 基金项目： | 国家自然科学基金，清华大学校科研和教改项目 |
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| 摘 要： | 在生活垃圾焚烧烟气模拟净化实验中,采用氯化镉作为气态重金属的发生源,模拟改性钙基吸附剂对重金属的动态吸附,并对重金属入口浓度、吸附温度、吸附剂投加量以及烟气组分等因素进行研究,结果表明:(1)反应温度对镉的去除有一定的影响,温度升高,去除率下降;(2)钙基吸附剂对Cd的去除率随着Cd入口浓度的增加而降低;(3)吸附剂投加量增加,去除率随之增加,但当加入量达到100g以上时,去除率不再变化;(4)HCl气体的存在能促进Cd的吸附,SO_2气体的存在则抑制Cd的吸附;(5)随着吸附质CdCl_2初始浓度的增加,钙基吸附剂的吸附量逐渐增加并趋向平衡,且与活性炭相当.
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| 关 键 词： | 吸附剂 烟气 镉 吸附 |
DYNAMIC ADSORPTION OF CADMIUM VAPOR IN SIMULATED MSW FLUE GASES |
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| LU Huan-liang,WANG Wei.DYNAMIC ADSORPTION OF CADMIUM VAPOR IN SIMULATED MSW FLUE GASES[J].Environmental Chemistry,2009,28(1). |
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| Authors: | LU Huan-liang WANG Wei |
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| Abstract: | A modified calcium-based adsorbent was used to adsorb cadmium vapor in a simulated MSW flue gas puri- fying system.Several factors concerning the adsorption performance were taken into consideration,including initial concentration of Cd vapor,temperature,injected dosage and flue gas components.The adsorption effi- ciency between modified calcium-based adsorbent and activated carbon was also compared.The results indicate that the adsorption trend of the modified calcium-based adsorbent is similar to that of activated carbon, which decreases with the increase of Cd inlet vapor concentration and the reaction temperature.In addition, the presence of SO_2 restrains the adsorption efficiency,while acid gas can enhance the adsorption process. |
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| Keywords: | adsorbent flue gases cadmium adsorption |
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