spatial variations of heavy metals in the soils of vegetable-growing land along urban-rural gradient of nanjing, china土壤重金属的空间变异的蔬菜种植土地沿城乡梯度的南京,中国.pdf

Int. J. Environ. Res. Public Health 2011, 8, 1805-1816; doi:10.3390/ijerph8061805 OPEN ACCESS International Journal of Environmental Research and Public Health ISSN 1660-4601 /journal/ijerph Article Spatial Variations of Heavy Metals in the Soils of Vegetable-Growing Land along Urban-Rural Gradient of Nanjing, China Shi-Bo Fang 1, Hao Hu 2, Wan-Chun Sun 2 and Jian-Jun Pan 3,* 1 Chinese Academy of Meteorological Sciences, Zhongguancun South Street 46, Beijing, 100081, China; E-Mail: sbfang0110@163.com 2 Zhejiang Academy of Agricultural Sciences, Shiqiao Road 198, Hangzhou, 310021, Zhejiang Province, China; E-Mails: huhao82@126.com (H.H.); sunwc76@ (W.-C.S.) 3 Nanjing Agricultural University, No.1 Weigang, Nanjing, 2 10095, Jiangsu Province, China * Author to whom correspondence should be addressed; E-Mail: jpan@ ; Tel.: +86-25 Received: 3 April 2011; in revised form: 22 April 2011 / Accepted: 27 April 2011 / Published: 25 May 2011 Abstract: China has experienced rapid urbanization in recent years. The acceleration of urbanization has created wealth and opportunity as well as intensified ecological and environmental problems, especially soil pollution. Our study concentrated on the variation of heavy metal content due to urbanization in the vegetable-growing soil. Laws and other causes of the spatial-temporal variation in heavy metal content of vegetable-growin