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Analyses and Evaluation of Heavy Metals in Vegetable Samples from a Gold Field(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2008年第04期
Page:
425-
Research Field:
环境地学
Publishing date:

Info

Title:
Analyses and Evaluation of Heavy Metals in Vegetable Samples from a Gold Field
Author(s):
XIE Juan; CHENG Yu-xiang; WANG Li-ping; GUO Ting-ting; HE Jian-jun
School o f Environmental Sciences and Engineering, Changan University Xian 710054, Shaanxi, China
Keywords:
gold mining area;  vegetable;  heavy metal;  polluting evaluation
PACS:
X502
DOI:
-
Abstract:
In order to investigate the biological effects of soil pollution in a gold mining area, vegetable samples were collected from polluted areas of heavy metals and unpolluted areas, and the mass ratios of heavy metals in the samples were analyzed. Results show that the contents of Hg, Pb, Cd, Cr and As in the samples from polluted areas are distinctly higher than those from unpolluted areas. According to the standard of food sanitation limit, the superscale multiples of Hg, Pb, Cd in vegetables are 20.37, 6.99 and 0.90, respectively, and the order of the average superscale multiples is Hg> Pb> Cd, but the As, Cr and Cu does not exceed the standard values. The average contents of Hg, As and Cu in vegetables in the study area is leafy> fruit category> root class, and the average contents of Pb, Cd and Cr is leafy> root class> fruit category. Different vegetables have different absorption abilities to heavy metals,and greengrocery, Chinese cabbage, radish leaves, and leek have a great absorption ability to Hg, Pb and Cd, therefore, they have been heavily polluted.

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Last Update: 2008-12-20