实验研究了用来自城市固体废物焚烧发电厂浸出液改性的高岭土对 PbCl 和 CdCl 的吸附作用。
Experimental study on adsorption of PbCl and CdCl on kaolin modified by leachates from municipal solid waste incineration power plant.
机构信息
Engineering Laboratory for Energy System Process Conversion & Emission Control Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing, 210023, China; Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, 210096, China.
出版信息
Chemosphere. 2023 Nov;340:139970. doi: 10.1016/j.chemosphere.2023.139970. Epub 2023 Aug 25.
Six kinds of waste liquids produced in the treatment process of leachate in a waste incineration plant were used to improve the adsorption effect of raw kaolin on heavy metal chloride. The capture performances of these modified kaolin on PbCl and CdCl vapor were investigated in a two-stage fixed bed combustor. The results indicated that the adsorption effects of raw kaolin on PbCl and CdCl were improved in some experimental groups, main effective component was Na in the leachate, but the influences did not change regularly with the increase in the concentration of Na introduced into kaolin. The adsorbents formed by modifying 10 g kaolin with 21.25 ml leachate 2 were the best adsorbents for PbCl and CdCl. The capture efficiencies of PbCl and CdCl can reach 95% and 63.88%, with the increase of 36% and 53%, respectively. Using leachate as modifying agent had the same effect as directly using Na. Adsorptions of PbCl and CdCl were still mainly chemical adsorptions. After adsorption of PbCl, the modified kaolin not only generated PbA1SiO, but also produced other chemical compounds. The adsorption of CdCl by modified kaolin did not generate CdAlSiO, but other chemical reactions occurred to generate CdAlO and PbCd (SiO).
六种来自垃圾焚烧厂渗滤液处理过程中的废液被用于提高原生高岭土对重金属氯化物的吸附效果。在两段式固定床燃烧器中，研究了这些改性高岭土对 PbCl 和 CdCl 蒸气的捕集性能。结果表明，在一些实验组中，原生高岭土对 PbCl 和 CdCl 的吸附效果得到了改善，主要有效成分是渗滤液中的 Na，但影响并没有随着引入高岭土的 Na 浓度的增加而规律变化。用 21.25ml 渗滤液 2 改性 10g 高岭土形成的吸附剂对 PbCl 和 CdCl 的吸附效果最好。PbCl 和 CdCl 的捕集效率分别可达到 95%和 63.88%，分别提高了 36%和 53%。使用渗滤液作为改性剂与直接使用 Na 具有相同的效果。PbCl 和 CdCl 的吸附仍主要是化学吸附。PbCl 吸附后，改性高岭土不仅生成了 PbA1SiO，还生成了其他化合物。CdCl 被改性高岭土吸附时并未生成 CdAlSiO，但发生了其他化学反应，生成了 CdAlO 和 PbCd（SiO）。
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