Investigation and assessment on the pollution of vegetable field with heavy metals in the suburbs of Foshan
Abstract：9 patches of vegetable field in the suburbs of Foshan were chosen to investigate and analyze their pollution with Cu, Zn, Ni, Pb, Cr and Cd. The pollution received an assessment by using the single factor and the Nemerow pollution index. The statistics of Zn, Cu, Ni, Pb, Cr and Cd were 100%, 87.3%, 89.1%, 74.5%, 94.5% and 34.5% respectively when the single factor method was used while those of Cu, Ni, Cr and Cd were 3.6%, 23. 6%, 30. 9%, and 30.9% respectively when the Nemerow pollution index was used. The former exceeded the background values of soil in Guangdong and the latter exceeded the National Secondary Standard for soil environment. The soil throughout the whole city of Foshan was heavily polluted with heavy metals among which Cd ranked first, Cr, second and Ni, last. Among the 9 chosen suburbs, Nanzhuang, followed by Zhangcha, Yanbu, Lishui, Luocun, Guicheng, Lanshi, Huangqi and Shishan, ranked first in pollution with heavy metals. The variation coefficient of Cd, which was the biggest and has reached the strong level, indicated the existence of pollution sources. There were very remarkable or remarkably positive relevant relation among Cu, Ni, Pb, Cr and Zn who obviously shared the same source.
Keywords：vegetable farm soilheavy metalpollutioninvestigationevaluation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 7-12 )