Application Research On The Degradation Process Of Organic Matter Based On Chemiluminescence Analysis

With the development of industry,the problem of environmental pollution is becoming more and more serious.The discharge of organic pollutants and harmful gases in the oxidative decomposition process of solid organic matter in waste water has caused great harm to people's health.Therefore,it is of great significance to monitor the degradation process of organic pollutants.However,the disadvantages of the current methods for monitoring the degradation of organic pollutants are that they cannot be monitored in real time or have low sensitivity.Therefore,there is an urgent need to develop a fast and sensitive method for monitoring the degradation of organic pollutants in real time.Chemiluminescence is often used as an effective monitoring method because of its high sensitivity.Based on the chemiluminescence phenomenon caused by organic matter degradation intermediates,this thesis realizes the real-time monitoring of organic matter degradation process and expands the application of chemiluminescence analysis methods in the field of organic matter degradation.The specific research contents are as follows:1.Based on the hydroxylated intermediate-luminol-sodium persulfate chemiluminescence system,a fast,sensitive and simple chemiluminescence method was established for monitoring the degradation process of organic 1,2-divinylbenzene.The results have shown that hydroxylated intermediates can significantly sensitize the luminol-sodium persulfate chemiluminescence system.It is speculated that the sensitization mechanism of hydroxylated intermediates is that under alkaline conditions,sodium persulfate oxidizes hydroxylated intermediate Superoxide anion radicals are produced,and then superoxide anion radicals and luminol react to produce luminol in the excited state,and chemiluminescence occurs when the luminol in the excited state returns to the ground state.The effects of different concentrations of sodium persulfate,DVB,different reaction temperatures,and pH on the production process of hydroxylated intermediates in the degradation reaction of sodium persulfate were systematically investigated.In addition,the real-time monitoring of hydroxylated intermediates during the degradation process of sodium persulfate involving p-toluene and benzoic acid demonstrates the versatility of the method.2.Based on formaldehyde producing catalytic luminescence on the surface of nano-yttrium oxide,a catalytic luminescence method was established to monitor the thermal degradation process of paraformaldehyde in real time.Using chemiluminescence spectroscopy characterization method,the mechanism of chemiluminescence catalyzed by yttrium oxide to formaldehyde was deeply discussed.The intensity of the catalytic luminescence signal generated by formaldehyde on the surface of yttrium oxide is proportional to the concentration of formaldehyde,and the detection of the content of formaldehyde generated by the organic material paraformaldehyde during the thermal degradation process was established.The catalytic luminescence sensor is used to realize the real-time monitoring of the degradation of paraformaldehyde under different conditions,and has a good monitoring effect.