二氧化氯氧化酚能力考察

論文編號:SW221  論文字數(shù):10072,頁數(shù):16

摘 要 ：工業(yè)含酚廢水處理常用方法一般有萃取、生物氧化、化學沉淀、氧化劑、蒸汽氣提和物理化學吸附等，并常以上述方法中的二種或二種以上方法聯(lián)合進行二級處理，但上述大多數(shù)的方法，在處理后廢水中殘留酚濃度均較高，濃度在100-500mg/L之間。采用新型高效氧化劑二氧化氯（ClO2）處理含酚廢水，其優(yōu)良的強氧化性能已在消毒、殺菌、環(huán)境、廢水處理等方面得到廣泛的應(yīng)用。用亞氯酸鈉制備二氧化氯，用丙二酸法測定二氧化氯總含量。配制鄰-硝基苯酚的溶液含量200 mg/L ,用時稀釋。研究二氧化氯的氧化效果，考察了溫度、攪拌速度、pH、酚起始濃度、反應(yīng)時間、二氧化氯用量等對實驗的影響，得到了較佳的條件，去除率達90%以上，是一種行之有效的含酚廢水處理方法。
關(guān)鍵詞：鄰-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