论文部分内容阅读
目的分析辽宁省农村集中式供水不同地下水源类型和水处理方式对饮用水中硝酸盐的影响,为改善水质提供科学依据。方法采用分层随机抽样方法,对819个监测点使用统一调查表进行基本信息收集,每个监测点枯水期(3~4月)和丰水期(7~8月)采集出厂水样进行检测。采用SPSS 20.0软件进行统计分析。结果地下水源类型中,泉水水源饮用水硝酸盐含量均合格;深井水源的超标率低于浅井水源,分别为7.10%和7.90%。水处理方式中,未处理的超标率(8.10%)最高,其次为仅消毒(4.20%),沉淀、过滤(0.60%),完全处理的(100.00%)。结论不同地下水源类型和水处理方式对饮用水中硝酸盐含量有影响。
Objective To analyze the influence of different types of underground water sources and water treatment methods on nitrate in drinking water of rural centralized water supply in Liaoning Province and provide scientific basis for improving water quality. Methods The stratified random sampling method was used to collect the basic information of 819 monitoring sites using the unified questionnaire. The water samples were collected from each monitoring spot in dry season (March to April) and wet season (July to August). SPSS 20.0 software for statistical analysis. Results In the types of groundwater sources, the nitrate content of drinking water in spring water sources was qualified. The exceeding standard rate of deep water sources was lower than that of shallow water sources, accounting for 7.10% and 7.90% respectively. Among the water treatment methods, the highest untreated rate (8.10%) was the highest, followed by disinfection (4.20%), sedimentation, filtration (0.60%) and total treatment (100.00%). Conclusion Different types of underground water sources and water treatment methods have an impact on the nitrate content in drinking water.