化工进展2024，Vol.43Issue(8)：4714-4725,12.DOI:10.16085/j.issn.1000-6613.2023-1134
垃圾焚烧典型工段灰/渣理化特性及环境风险性
Physicochemical characteristics and environmental risk of ash/slag in typical sections of MSW incineration
摘要
Abstract
The apparent,chemical,and leaching characteristics of five types of ash/slag samples(waste heat boiler ash/slag S1,semi-dry deacidification ash S2,bag dust removal ash S3,raw fly ash S4,and chelator stabilized fly ash S5)in typical sections of MSW incineration were studied,and the environmental risks of heavy metals in ash/slag samples were evaluated.The results showed that S1 exhibited significant differences in apparent characteristics compared to other samples,with a yellowing color,uneven particle size,and high Si and Al content,indicating a great potential for resource utilization.A higher content of soluble chloride salts and highly toxic heavy metals(Pb,Cd)were enriched in S3,which could be treated separately for dechlorination and detoxification.In terms of particle size distribution,there were two peaks in the range of 7-20μm and 40-120μm for S5,which had certain defects in its stabilization effect.The exchangeable and carbonate bound states of Cr(4.45%)in S1 and Pb(3.04%)and Cd(4.28%)in S3 were relatively high,indicating a high potential leaching environmental risk.Special attention should be paid to their harmless treatment and resource utilization,especially in acidic(such as acid rain or landfill leachate leaching)disposal or application scenarios.The potential environmental risk level of S1 containing heavy metals was much lower than the other four ash samples.Under the simulated landfill leachate leaching environment,the comprehensive environmental risk level of heavy metals in the five ash/slag leaching solutions was higher than that in the simulated acid rain leaching environment,and the leaching environmental risk level of Cd in S1,S3,S4,and S5 showed an"extremely strong"level.The research results could provide theoretical basis for the classification and utilization of ash/slag in typical MSW incineration sections,refined management,and scientific environmental risk assessment.关键词
垃圾焚烧/工艺流程/灰/渣/理化特性/环境风险Key words
MSW incineration/technological process/ash/slag/physicochemical properties/environmental risk分类
资源环境引用本文复制引用
尹俊权,吴寅凯,李卫华,孙英杰,张闻轩,张庆建,马晓腾,卞荣星,王华伟..垃圾焚烧典型工段灰/渣理化特性及环境风险性[J].化工进展,2024,43(8):4714-4725,12.基金项目
国家自然科学基金(52000111,51978350) （52000111,51978350）
山东省博士后创新项目(202103026) （202103026）
国家环境保护危险废物鉴别与风险控制重点实验室开放基金(2022YSKY-06) （2022YSKY-06）
山东省高等学校青年创新团队人才引育计划 （）
青岛市博士后应用研究项目. （）
