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.
A modified calcium-based adsorbent was used to adsorb cadmium vapor in a simulated MSW flue gas purifying 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 efficiency 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 SO2 restrains the adsorption efficiency, while acid gas can enhance the adsorption process.
出处
《环境化学》
CAS
CSCD
北大核心
2009年第1期35-38,共4页
Environmental Chemistry
基金
国家自然科学基金(No.20277024)
清华大学实验室开放基金资助项目.
关键词
吸附剂
烟气
镉
吸附.
adsorbent, flue gases, cadmium, adsorption.
