城市垃圾焚烧飞灰物理化学性质及重金属风险分析  

Physicochemical properties and risk assessment of heavy metals in the incinerated municipal solid waste fly ash

作　　者：黎永伦 陈维芳[1] 王叶贵 方贵琳 LI Yonglun;CHEN Weifang;WANG Yegui;FANG Guilin(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《能源研究与信息》2023年第1期1-8,共8页Energy Research and Information

摘　　要：对7种城市垃圾焚烧飞灰的物理化学性质进行了详细表征。针对飞灰中重金属成分复杂的特点,对重金属含量、形态分布和浸出毒性进行了分析,并进行了重金属风险评估指数和风险指数计算。飞灰的化学组分和晶相结构分析显示,城市垃圾焚烧飞灰中含有大量的CaO、CaSO_(4)、SiO_(2)、Al_(2)O_(3)、NaCl和KCl等化合物,具有资源化利用的潜力。但同时飞灰中含有大量的重金属,其中Pb和Cd的生态风险高,浸出毒性高于飞灰直接处理和处置要求。研究结果表明,垃圾焚烧飞灰需进行处理至达到一定要求后才能进行资源化利用。Physicochemical properties of fly ash samples from 7 municipal solid waste incineration plants were characterized.In terms of their complex composition of heavy metals,the content,speciation,and leaching of heavy metals were determined,and their risk assessment code and risk index were evaluated accordingly.Chemical composition and crystal structure analysis showed that the fly ash samples were rich in CaO,CaSO_(4),SiO_(2),Al_(2)O_(3),NaCl,and KCl etc.and had great potential for recycling.But fly ash contained large amounts of heavy metals.Among them,Pb and Cd were highly hazardous to the environment and their leaching concentration exceeded the limitation of relevant national standards.It indicated that the harmless treatment of fly ash was required before reutilization.

关 键 词：飞灰 化学组分 重金属 浸出毒性 风险评估 

分 类 号：X169[环境科学与工程—环境科学]