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Huang Y.,Yunnan Institute of Geological Environmental Monitoring | Cai B.-X.,Yunnan Institute of Geological Environmental Monitoring | Wang Y.,Yunnan Institute of Geological Environmental Monitoring | Li H.-X.,Hubei University
Geological Bulletin of China | Year: 2014

Drinking water quality for human health safety is the primary problem of water sources. Analysis and evaluation in this aspect were conducted on the basis of investigation of a tin pit water which serves as drinking water source of town A in Gejiu City and ore block B. Human health risk assessment of drinking water was carried out with the risk assessment model recommended by the International Radiation Protection Committee and the US Environmental Protection Agency. The results show that health hazards of carcinogenic material caused by heavy metals in water are high, and the risk value exceeds the maximum acceptable level of risk recommended by the International Commission on Radiological Protection. Sexavalence chromium and arsenic are maximum carcinogenic risk substances and hence should be preferentially controlled. The health risk caused by the non-carcinogenic matter is relatively insignificant. The values below 10-8 are by far lower than the recommended maximum acceptable risk level. Although the heavy metal content in water meets the requirements of relevant standards, there still exists human health risk if such water is drunk for a very long time. Source


Cai B.-X.,Yunnan Institute of Geological Environmental Monitoring | Huang Y.,Yunnan Institute of Geological Environmental Monitoring | Wang Y.,Yunnan Institute of Geological Environmental Monitoring | Li H.-X.,Hubei University | Chai J.-L.,Yunnan Institute of Geological Environmental Monitoring
Geological Bulletin of China | Year: 2014

Different enrichment capabilities of heavy metals between maize and pomegranate have important significance for guiding and adjusting agricultural products in the polluted land. Based on collecting soil and plant samples, the authors analyzed different enrichment coefficients of heavy metals between corn and pomegranate. Some conclusions have been reached: ①The average standard rate of Cr, Pb, Cd and As in pomegranate samples is 3.70%, 25.93%, 74.07% and 7.41% respectively, and the average standard rate of Cr and Pb in corn sample is 3.7% and 22.22% respectively. The standard-surpassing phenomenon of heavy metals in pomegranate is more obvious than that in maize, and the enrichment capability of pomegranate for Cd, Pb, As is obviously higher than that of maize; ②As for heavy metal content of different soils, the standard-surpassing phenomenon of pomegranate is more obvious than that of maize. Pomegranates can enrich more Cd, Cr, Pb and As than maize except for Cr. Especially in low heavy metal content soil, the standard surpassing phenomenon of pomegranate is significantly higher than that of maize. It is thus held that pomegranate can absorb more Cd, Cr, Pb, As than corn in soils suffering the same heavy metal pollution and that, from the angle of the safety of edible agricultural products, the local government should optimize the layout of agricultural production and grow more maize and less pomegranate. Source


Huang Y.,Yunnan Institute of Geological Environmental Monitoring | Cai B.-X.,Yunnan Institute of Geological Environmental Monitoring | Wang Y.,Yunnan Institute of Geological Environmental Monitoring | Li H.-X.,Hubei University | Chai J.-L.,Yunnan Institute of Geological Environmental Monitoring
Geological Bulletin of China | Year: 2014

Mining activity is one of the important factors responsible for heavy metal accumulation in soil. The authors analyzed the relationships between seven kinds of soil heavy metal elements in the Gejiu mining area and the influenced area whose geological conditions is the same as the mining area in comparison with areas unaffected by mining activities. The heavy metal accumulation values and rates of mining activities on soils in the mining area and the influenced area were evaluated one by one in the light of total heavy metals and background-like values in surface soil of the compared area. The results show that the heavy metal accumulation values are in order of Pb>Zn>As>Cu>Cd>Cr>Hg in the mining area and Pb>Zn>As>Cu>Cd>Cr>Hg in the mining influenced area. There is close relationship between Pb, Cd, As, Zn, Cu and mining activities. Pb, Cd and As, characterized by high accumulation and high risk, should be most emphatically controlled in the mining area. Source

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