摘要
以华南某垃圾焚烧厂为研究对象,根据研究区域主导风向特点,以焚烧炉为中心进行布点,累积采集环境空气样98个,焚烧炉烟气9个,分析了焚烧炉周围环境空气中重金属的空间分布特征.同时,采用相关分析和主成分分析法,分析了焚烧炉周围环境空气TSP中重金属含量与焚烧炉烟气中重金属含量的关系.结果表明,焚烧炉周围环境空气中各重金属的含量(μg·m-3)排序为:Fe(0.766～19.551)>Zn(0.791～1.833)>Mn(0.431～1.014)>Pb(0.263～0.626)>Cu(0.054～0.578)>Cr(0.057～0.180)>Ni(0.030～0.106)>Cd(0.017～0.044)>As(0.009～0.014)>Tl(0.002～0.004).焚烧炉烟气各重金属含量(μg·m-3)排序为:Zn(90～4570)>Ni(4～3510)>Cr(2～650)>Cu(5～1380)>Pb(25～430)>Cd(2～53)>Tl(0.1～3).分析各元素空间分布特征发现,除与距焚烧炉距离远近有关外,其他人为活动(如农业活动)对焚烧炉周围环境空气中重金属含量也有一定的贡献.对各采样点金属含量进行相关性分析,发现焚烧炉烟气与其他采样点的重金属间有显著相关性(r>0.81,p<0.05),对各采样点元素含量进行主成分分析也得到了相似结论,说明焚烧炉对周围环境空气重金属含量有直接影响.
Taking a MSWI in the Pearl River Delta as an example, the relationship between airborne metals in the surroundings of the incinerator and incinerator flue gas was examined using correlation analysis and principal component analysis. Based on the dominant wind direction information, 98 environmental TSP samples together with 9 incinerator flue gas samples were collected. Concentrations of the metals（μg·m^-3）in TSP were Fe（0.766～19.551）〉Zn（0.791～1.833）〉Mn（0.431～1.014）〉Pb（0.263～0.626）〉Cu（0.054～0.578）〉Cr（0.057～0.180）〉Ni（0.030～0.106）〉Cd（0.017～0.044）〉As（0.009～0.014）〉Tl（0.002～0.004）.The relevant values（μg·m^-3）of the incinerator flue gas were Zn90～4570）〉Ni（4～3510）〉Cr（2～650）〉Cu（5～1380）〉Pb（25～430）〉Cd（2～53）〉Tl（0.1～3）.Spatial variations of the elements listed above were investigated and the results showed that despite the distance from the MSWI, anthropogenic activities （ such as agricultural activities） have made some contributions to the contents of the heavy metals in the ambient air. The correlation analysis and principle component analysis results showed that the correlation of heavy metals concentration between MSWI flue gas and ambient environmental TSP were more than 0.81 （p 〈 0.05 ）. It was concluded that the MSWI had a direct contribution to the increase of the heavy metal contents in the surrounding air.
出处
《环境科学学报》
CAS
CSCD
北大核心
2013年第7期1833-1839,共7页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.41203061
40903044)
国家环保公益性行业科研专项(No.201109001)~~
