摘要
以西南3个省会城市(直辖市)贵阳、南宁和重庆为研究对象,研究城市家庭灰尘中Ca、Fe、Cd、Cr、Cu、Ni、Pb和Zn的含量及累积状况.结果显示3个城市的家庭灰尘中Ca、Fe含量的空间变异度较小,其他元素空间变异度较大.贵阳与重庆家庭灰尘重金属水平较为接近,南宁相对略低.贵阳市家庭灰尘中Ca(10.1%)含量高于南宁市,Cd(1.18mg/kg)、Cu(207mg/kg)、Ni(87.3mg/kg)和Pb(259mg/kg)含量均高于重庆市和南宁市,其中贵阳市家庭灰尘中Ca、Cd和Cu含量显著高于南宁市.与3城市土壤重金属背景值相比,6种有毒重金属中,Zn、Pb和Cd在家庭灰尘中累积相对较重;3城市中,南宁市家庭灰尘重金属累积相对较重;贵阳、南宁和重庆家庭灰尘重金属累积较重的元素分别是Zn和Pb、Zn和Pb、Cd和Zn.
Previous studies on dust heavy metals are focused on outdoors with little concerning indoors in China. Samples of household dusts were collected from 3 cities including Guiyang, Nanning and Chongqing in Southwestern China, and the level and accumulation characteristics of Ca, Fe, Cd, Cr, Cu, Ni, Pb and Zn were analyzed and discussed. The results show that heavy metal levels of household dusts in Guiyang and Chongqing are nearly equivalent and relatively higher than that in Nanning. Concentrations of Cd（1.18 mg/kg）, Cu（207 mg/kg）, Ni（87.3 mg/kg）and Pb（259 mg/kg）in Guiyang are higher than those in Chongqing and Nanning, and concentrations of Ca, Cd and Cu in household dusts in Guiyang are significantly higher than those in Nanning. Compared with background levels of 6 studied toxic elements in soils, Zn, Pb and Cd accumulations in household dusts are serious and Nanning is the most serous city in the three investigated cities. Two sever accumulated heavy metals in household dusts in Guiyang, Nanning and Chongqing are Zn and Pb, Zn and Pb, and Cd and Zn, respectively.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2013年第2期365-371,共7页
China Environmental Science
基金
国家自然科学基金资助项目(41161079)
贵州省科学技术基金(黔科合J字[2011]2092)
关键词
重金属
家庭灰尘
贵阳
南宁
重庆
heavy metal
household dust
Guiyang Nanning
Chongqing
