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The degradation of p-nitrotoluene by O3/H2O2 process in a bubble contact column was investigated. Effects of the molar ratio of hydrogen peroxide to ozone,pH value and t-butanol on the oxidation process were discussed. It was found that the proper H2O2/O3 molar ratio for the degradation of p-nitrotoluene was around 0.6, different pH values and the presence of t-butanol highly influenced the removal efficiency of p-nitrotoluene. 5-methyl-2-nitrophenol, 2-methyl-5-nitrophenol, (4-nitrophenyl) methanol, 5-(hydroxymethyl)-2-nitro phenol, acetic acid, 2-methylpropane diacid and 2-(hydroxylmethyl)propane diacid were identified as degradation intermediates and products through GC-MS. Radical reaction mechanism and degradation pathway were proposed based on the results of experiments. It is deduced that the benzene ring of p-nitrotoluene can be only destroyed by hydroxyl radicals through a polyhydroxy intermediate pathway. Then unstable polyhydroxy intermediates can be oxidized to different acids with low molecular weight rapidly. 相似文献
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1前言Schiff碱化合物可作为螯合剂、稳定剂、生物活性剂、分析试剂和催化剂等,广泛地应用于科学研究及化工生产中[1,2].另外,某些Schiff碱化合物与金属元素的配合物具有特殊的性质和用途,如可做仿酶催化剂、核磁共振位移试剂和稀土发光塑料等[3,4],受到人们的重视。为了研究稀土元素Schiff碱配合物的特性,首先制备了一个未见报道的对二甲氨基苯甲醛1─萘胺Schiff碱新化合物。对于Schiff碱化合物的制备,目前多采用苯共沸脱水法[5],而我们以无水乙醇为溶剂,回流脱水制备schiff碱化合物,该方法操作简便,且收率较高。2实验… 相似文献
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0 INTRODUCTIONThesedays ,someman madeorganiccompoundsandtheirdegradationproductsarefoundtobeharmfultohor mone secretinginbodyofbothpeopleandanimalsandtheycouldresultindisorderofincretion .Thesecom poundsarenowbedefinedasenvironmentalendocrinedisruptor[1] .Itiswell knownthatthesecompoundsareverydifficulttodegradebynatureprocess .Andbecausetheyarelipid soluble ,theyareeasytoamassinlipidandliverandhardtodischargeoutofbody .Thetoxicityissynergicanditssymptomshowspersisting ,slowandgrad ual.… 相似文献
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采用顺丁烯二醇与三氯锗烷在酸性条件下加成,得到三氯锗丁二酸,然后水解得到1,1,2-乙三酸,收率为61%。 相似文献
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