2009•Journal of the South China Agricultural UniversityRequires access
The investigation and evaluation of heavy metal pollution in wastewater irrigated soils and vegetables in the suburb of Foshan.
Mei Li, Qi‐Tang Wu, Rui Li, Chengrong Nie, Liang JiaRui, Ouyang FengMei, Chen CaiFeng
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Abstract
The heavy metals pollution on soils and vegetables for some sewage-irrigated vegetable bases in the suburb of Foshan were investigated.The results showed that the heavy metal contamination in soils of the suburb of Foshan was serious.The contents of Hg and Cd exceeded 93.88% and 12.24% respectively in the collected soil samples,comparing to the Grade II limited values of the national soil environment quality standard.The comprehensive pollution indexes of 77.5% of the soils were greater than 1.The leaf vegetables grown in these fields were suffered from the pollution of Cr,Pb and Cd to a different extent,except heavy metal Hg.The contents of Cr,Pb and Cd exceeded 28.57%,14.29% and 21.43% respectively in comparison with pollution-free food standard.