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| DOI：10.13522/j.cnki.ggps.2017.0134 |
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| Analysis of Iron and Manganese Pollution and Environmental Health Risk Assessment of Groundwater in Xiaoxinhe Gas Field |
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ZHANG Debin， LIU Guodong， ZHONG Rui
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a. College of Water Resource & Hydropower; b. State Key Laboratory of Hydraulic & Mountainous River Exploitation and Protection, Sichuan University, Chengdu 610065, China
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| Abstract: |
| 【Objective】 Study the groundwater pollution and environmental health risk of iron and manganese in Xiaoxinhe area. 【Method】 The influencing factors of iron and manganese ion concentration in groundwater were studied by using geographic information system (GIS) and quantitative statistical analysis tools (SPSS) based on the analysis of 37 groundwater samples and 8 soil samples. Comprehensive environmental health risk assessment of rural drinking water sources was evaluated using single factor index, weighted comprehensive water quality index and health risk assessment method. 【Result】 The results showed that the main pollutants were total iron and total manganese which came from the high ions concentration of iron and manganese in groundwater resulted from the input of organic matter and total nitrogen under reduced conditions. The other main pollutant was total nitrogen caused by irrigation and fertilization. The range of comprehensive water quality was from the excellent to the very poor. The very poor quality of water samples was 27% in which total iron, manganese and nitrogen concentrations exceeded the standard. The non-carcinogenic of risk indexes of iron and manganese were less than 1, which had no carcinogenic chronic toxic effect on resident health. However, iron and manganese pollution should be given our most careful attention. 【Conclusion】 Pretreatment should be carried out before drinking, and iron and manganese should be taken as the key control pollutants. |
| Key words: iron and manganese ions; pollution analysis; weighted comprehensive water quality index; water quality assessment ; health risk assessment |
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