垃圾焚烧飞灰自然堆积过程中细颗粒扩散的健康风险评估

Health Risk Assessment of Spread of Fine Particle in Natural Accumulation of Municipal Solid Waste Incineration(MSWI) Fly Ash

通过分析不同粒径飞灰细颗粒重金属和二噁英含量以及15个垃圾焚烧飞灰重金属和二噁英总量,评估我国飞灰中PM_(10)及PM_(2.5)重金属和二噁英平均含量。利用USEPA AP-42及SCREEN3估算飞灰在自然堆积时PM_(10)及PM_(2.5)的散逸浓度,进而分析得到,飞灰自然堆积时,操作现场、最大落地点32 m及800 m处可能受影响人群的致癌风险(Risk)和非致癌风险(HQ)均超过工业场地及居住用地风险标准。主要风险物质是重金属,二噁英引起的风险极小。

According to the analysis on the different particle sizes of fly ash fine particle heavy metal and doxin contents,and the total content of 15 MSWI fly heavy metals and doxins,the average contents of PM10 and PM2.5 heavy metals,and doxin in fly ash are assessed in China.The USEPA AP-42 and SCREEN3 are used to estimate the spread concentration of PM2.5 and PM10 of fly ash during the natural accumulation so as to analyze that the cancer risk(Risk)and non-cancer(HQ)risk possibly influencing the crowd in the operation field and the maximum falling to the ground 32m and 800m all exceed the risk standards of industry field and housing land during the natural accumulation of fly ash.The main risk material is heavy metal.The risk caused by the doxin is the minimum.