Accumulation and risk assessment of heavy metals in dust in main living areas of Guiyang City, Southwest China
- 129 Downloads
Guiyang is a famous tourist city located in southwestern China. In this study, dust from eleven residential areas, seven city squares, and nine schools was collected to measure the heavy metal levels and evaluate its risk. At each sampling site, 4–5 sub-samples were taken as a bulk sample. All samples were air-dried, ground, passed through a 0.105 mm nylon sieve, digested with HNO3-HClO4 to determine the concentrations of Cd, Cu, Ni, Pb and Zn by ICP-MS, and digested with 1:1 aqua regia to determine As by AFS. The results show that the concentrations of As, Cd, Cu, Ni, Pb and Zn in dust of Guiyang City follow normal distribution with means of 16.1, 1.54, 138, 47.7, 129 and 479 mg/kg, respectively. Levels of As, Cd, Cu, Ni, Pb and Zn exceed the background level of soil in Guizhou Province by 33%, 96%, 100%, 78%, 96%, and 100%, respectively. Cd, Cu, Pb and Zn are heavily accumulated in dust of living areas with accumulation factors of 4.10, 5.12, 4.12 and 5.51, respectively. City square possesses the highest geometric means of As, Cd, Cu, Pb, and Zn. The risks of heavy metal exposure to teenagers are not obvious and in an order of As>Pb>Cu>Ni>Zn (Cd).
Key wordsheavy metal dust main living area Guiyang City Southwest China
Unable to display preview. Download preview PDF.
- NEPA (The National Environmental Protection Agency) (1990) Background Value of Soil Elements in China [M]. pp.329–482, Press C.E.S., Beijing.Google Scholar
- Del Rio-Salas R., Ruiz J., De la O-Villanueva M., Valencia-Moreno M., Moreno-Rodríguez V., Gómez-Alvarez A., Grijalva T., Mendivil H., Paz-Moreno F., and Meza-Figueroa D. (2012) Tracing geogenic and anthropogenic sources in urban dusts: Insights from lead isotopes [J]. Atmospheric Environment. 60, 202–210.CrossRefGoogle Scholar
- Saeedi M., Li L.Y., and Salmanzadeh M. (2012) Heavy metals and polycyclic aromatic hydrocarbons: Pollution and ecological risk assessment in street dust of Tehran [J]. Journal of Hazardous Materials. 9, 227–228.Google Scholar
- Fang Fengman, Jiang Bingyan, Wang Haidong, and Xie Hongfang (2010) Particle size distribution and health risk assessment of heavy metals in surface dust of Wuhu urban area [J]. Geographical Research. 29, 1193–1201.Google Scholar
- Wang Xiaoyun, Ma Jianhua, Hou Qian, and Duan Haijing (2011) Accumulation and health risk assessment of heavy metals in kindergarten surface dust in the city of Kaifeng [J]. Acta Scientiae Circums Tantiae. 31, 583–593.Google Scholar
- Li Ruzhong, Zhou Aijia, Tong Fang, Wu Yadong, Zhang Ping, and Yu Jia (2011) Distribution of metals in urban dusts of Hefei and health risk assessment [J]. Environmental Science. 32, 2661–2668.Google Scholar
- Li Xiaoyan and Liu Yanqing (2013) Heavy metals and its source in outdoor settled dusts in different function areas of cities [J]. Environmental Science. 34, 3648–3653.Google Scholar
- Liu Dehong, Wang Fayuan, Zhou Wenli, and Yang Yujian (2012) Heavy metal pollution in street dusts from different functional zones of Luoyang City and its potential ecological risk [J]. Environmental Science. 33, 253–259.Google Scholar
- Chen Cancan, Lu Xinwei, Wang Lijun, and Lei Kai (2011) Health risk assessment of heavy metals in street dust in Baoji City [J]. Urban Environment & Urban Ecology. 24, 35–38.Google Scholar