垃圾焚烧飞灰去除硫化氢气体

垃圾焚烧会产生有毒气体，应进行无害化处理 #生活技巧# #节省生活成本# #生活垃圾分类指南# #生活垃圾分类知识#

摘要:生活垃圾焚烧飞灰由于含有铅镉等重金属,是一种危险废物,若处理不当,会造成重金属迁移和污染地下水等环境生态问题.近年来,垃圾焚烧飞灰的污染控制及资源化利用得到国内人广泛的关注.以垃圾焚烧飞灰为吸附材料,对比研究了2种不同性质的垃圾焚烧飞灰、热电厂粉煤灰以及砂土在相同条件下对硫化氢(H2S)的吸附性能.结果表明,垃圾焚烧飞灰的H2S吸附能力优于其他吸附材料.通过分析吸附前后垃圾焚烧飞灰的浸出液毒性,发现吸附前Cd、Pb 2种金属离子浓度超标,H2S吸附后的飞灰浸出液中金属离子浓度均有一定程度的降低.

关键词:垃圾焚烧 / 飞灰 / 硫化氢 / 吸附

Abstract:The municipal solid waste incineration (MSWI) fly ash is generally a hazardous waste because it contains heavy metals such as lead and cadmium. If it is not handled properly, it can cause severs environmental problems, resulting in heavy metal migration and groundwater contamination. Pollution control and beneficial utilization of MSWI fly ash have gained wide attention in recent years. In this study, two different types of MSWI fly ash were used as sorbents for H2S removal. Laboratory experiments were conducted to investigate the performance of H2S removal by different materials, including MSWI fly ash, coal fly ash and sandy soil. Result indicated that MSWI fly ash has better H2S removal ability than other materials. In addition, the leachate toxicity of MSWI fly ash was analyzed. It was found that the concentrations of Cd and Pb in the MSWI fly ash were over the TCLP standards, however, the heavy metal concentrations decreased after H2S absorption.

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