论文部分内容阅读
对2012年1月—2013年12月我国南方某市4个主要水厂出厂水中三卤甲烷(THMs)、卤乙酸(HAAs)和三氯乙醛(CH)等三类氯化消毒副产物(DBPs)的监测数据进行统计分析,在超标风险水平分级条件下,对各类DBPs进行风险评估;同时,运用综合污染指数法对4个主要水厂的DBPs的超标综合风险予以评价。结果表明,THMs和HAAs两类DBPs的超标风险相对较低,基本处于无风险或三级风险状态,而CH具有相对较高的超标风险;三类DBPs的超标风险整体呈现明显的季节性变化,高温季节(5月—10月)相对较高。此外,4个主要水厂DBPs超标风险综合评价指数从高到低依次为A、B、D和C,但均处于较低水平,该市饮用水DBPs综合超标风险水平较低。通过以上评价,明确了该市饮用水DBPs整体风险水平及重点控制指标,对保障饮用水供水安全具有重要意义。
From January 2012 to December 2013, three types of chlorinated disinfection by-products (THMs, HAAs and CH) in the water of the four major waterworks in a city of southern China DBPs) were used for statistical analysis. Risk assessment of various DBPs was carried out under the condition of excessive risk level grading. At the same time, the comprehensive risk index of DBPs in four major water plants was evaluated by comprehensive pollution index method. The results showed that the overdosing risks of THPs and HAAs were relatively low, basically in a risk-free or three-level risk state, while CHs had a relatively higher risk of exceeding the standard; the over-standard risks of three types of DBPs showed obvious seasonal changes, The hot season (May - October) is relatively high. In addition, the risk assessment indexes of over-standard risk of DBPs in four major waterworks were A, B, D and C in descending order, but all of them were at a low level, and the comprehensive risk level of drinking water DBPs in the city was relatively low. Through the above evaluation, the city’s overall level of drinking water DBPs risk and key control indicators clear, to protect the safety of drinking water supply is of great significance.