二氧化氯氧化酚能力考察

范文编号:SW221  范文字数:10072,页数:16

摘 要 ：工业含酚废水处理常用方法一般有萃取、生物氧化、化学沉淀、氧化剂、蒸汽气提和物理化学吸附等，并常以上述方法中的二种或二种以上方法联合进行二级处理，但上述大多数的方法，在处理后废水中残留酚浓度均较高，浓度在100-500mg/L之间。采用新型高效氧化剂二氧化氯（ClO2）处理含酚废水，其优良的强氧化性能已在消毒、杀菌、环境、废水处理等方面得到广泛的应用。用亚氯酸钠制备二氧化氯，用丙二酸法测定二氧化氯总含量。配制邻-硝基苯酚的溶液含量200 mg/L ,用时稀释。研究二氧化氯的氧化效果，考察了温度、搅拌速度、pH、酚起始浓度、反应时间、二氧化氯用量等对实验的影响，得到了较佳的条件，去除率达90%以上，是一种行之有效的含酚废水处理方法。
关键词：邻-硝基苯酚；二氧化氯；氧化；去除率

Abstract: The common treatments of phenolic wastewater were extraction, biological oxidation, chemical precipitation, oxidizer, Steam stripping, chemical and physical adsorption, and often use the two or over two species of the above method joint secondary treatment, however, in the majority of the above treatments, residual phenol concentration was high in wastewater and the concentration was between 100-500 mg / L. New high efficiency oxidizer chlorine dioxide (ClO2) was used to treat phenol wastewater and the excellent oxidation resistance has been widely applied in the aspects of disinfection, sterilization, environment, sewage treatment and so on. Chlorine dioxide was produced with sodium nitrite, the consistency of chlorine dioxide was determined with malonic acid. The o–nitrophenol solution was prepared at 200 mg/L, it was diluted when used. The oxidation effect of chlorine dioxide was researched. The effects of temperature, stirring speed, pH, initial phenol concentration, reaction time, the amount of chlorine dioxide on the experiment were studied. The optimal conditions were obtained. The removal rate was above 90% under the optimal conditions. This method is an effective method for the treatment of wastewater containing phenol.
Key words:  O-nitrophenol；Chlorine dioxide；Oxidation；Removal rate

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