研究论文
王笑梅,刘桂建,黄润.淠河灌区集中式饮用水源地水质健康风险等级研究[J].环境科学学报,2014,34(3):781-787
淠河灌区集中式饮用水源地水质健康风险等级研究
- The health risk level of water quality in the centralized drinking water sources of the River Pihe irrigation district
- 基金项目：国家科技支撑计划项目（No.2012BAC10B02）；安徽省高等学校省级自然科学研究重点项目（No.KJ2012A276，KJ2013A256）；安徽省哲学社会科学规划课题（No.AHSKF11-12D346）
- 作者
- 单位
- 王笑梅
- 1. 皖西学院资源环境与旅游管理学院, 六安 237012;2. 中国科学技术大学地球和空间科学学院, 合肥 230026
- 刘桂建
- 中国科学技术大学地球和空间科学学院, 合肥 230026
- 黄润
- 皖西学院资源环境与旅游管理学院, 六安 237012
- 摘要：为了解淠河灌区集中式饮用水源地水质健康风险状况，选取Cr6+、As、Cd、Pb、Mn、Cu、Zn、Fe、F、NH4+-N等10项污染因子作为健康风险指标，运用三角模糊集理论和α-截集技术，确立置信度为0.8，得到各污染指标的健康风险区间值；同时建立模糊化特征的风险等级判别标准和判别方法.结果表明，该水源地水质总健康风险值为4，风险等级为Ⅳ级（一般）.3种化学致癌物Cr6+、As、Cd合计风险区间值介于5.586×10-5~9.365×10-5之间，风险由高到低的顺序依次为：Cr6+>As>Cd，浓度在空间上变化不大，具有一定的负面效应，但均未超过美国环保署推荐的最大可接受水平1.0×10-4；Cr6+风险区间值较大，风险等级较高，应将Cr6+作为首要的健康风险管理控制指标. 其余7种非致癌化学有毒物没有风险，不存在负面效应，非致癌健康风险明显低于致癌风险.
- Abstract：The health risk level of water quality in the centralized drinking water sources of the river Pihe irrigation district was studied by selecting the pollutants of Cr6+, As, Cd, Pb, Mn, Cu, Zn, Fe, F and NH4+-N. The interval values of the health risk of each indicator for confidence degrees of 0.8 were identified based on the triangular fuzzy mathematics theory and α_cut set technique. In addition, a new classification model characterized by an assessment criterion of seven-graded health risk based on the fuzzy set theory was developed. The results indicate that the gross value of health risk is four with the risk level of Ⅳ in this district. The risk values of three chemical carcinogens range from 5.586×10-5 to 9.365×10-5 and are in the order Cr6+>As>Cd. With little spatial variation, the risk level has some negative effects, but lower than the maximum allowance level recommended by U.S.EPA (1.0×10-4 a-1). Cr6+ is considered the primary polluting factor due to its higher interval values, and controlling the emissions of the waste water containing Cr6+ should be prioritized in prevention and management. The seven non-carcinogens are risk-free and have no negative effect, thus their non-carcinogenic risks are significantly lower than the health risks caused by the carcinogens in the drinking water.
- Key words：drinking water source level of health risk triangular fuzzy number confidence degree the river Pihe irrigation district
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