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中文摘要：
在自主研发的一套COD在线监测系统上根据正交实验结果确定臭氧协同紫外在线检测水体COD的最优消解条件。研究了影响消解效率的4个变量：进臭氧量、消解时间、消解温度以及消解溶液的pH。在实验中采用4因素3水平L9（34）矩阵进行研究,忽略4因素之间的相互作用。结果表明,COD在小于100 mg·L^（-1）时,臭氧协同紫外在线检测水体COD的最优消解条件是：进臭氧量为160～190 mg,消解时间为15 min,消解温度为30℃,消解溶液pH值为4～6。实验证明,对于COD不超过100 mg·L^（-1）的水样消解率可达到98%,对于含苯环有机物消解率也均在95%以上。
英文摘要：
Optimum digestion conditions are obtained based on the orthogonal experimental method,using a set of self-designed systems for monitoring chemical oxygen demand（ COD） with ozone-combining UV technique.Four parameters related to the digestion efficiency were studied： amount of ozone input,digestion time,digestion temperature,and solution pH. L9（ 34） matrix was adopted for the study and the interactions among the four parameters were neglected. Depending on the experimental results,the optimum digestion conditions for COD content〈 100 mg·L^（-1）were determined. They optimum ozone input,digestion time,digestion temperature,solution pH were 160-to 190 mg,15 min,30 ℃,and 4 to 6,respectively. The digestion efficiency can reach 98% for general samples and 95% for benzene organic matter.
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