天然锰钾矿氧化降解水体中苯酚实验研究  

An investigation into the oxidation and degradation of phenol in water by natural cryptomelane

作　　者：李改云[1] 鲁安怀[2] 高翔[2] 赵玉岐 李巧荣[1] 杨欣[1] 

机构地区：[1]中国地质大学,北京100083 [2]北京大学地球与空间科学学院,北京100871 [3]华北科学技术学院,河北三河101601

出　　处：《岩石矿物学杂志》2003年第2期162-166,共5页Acta Petrologica et Mineralogica

基　　金：基础研究重大项目前期专项资助项目 (2 0 0 1CCA0 2 40 0 );国家自然科学基金资助项目 (4 9972 0 17)

摘　　要：在酸性条件下进行了锰钾矿氧化降解水体中苯酚的实验研究 ,结果表明 :室内自然光照和氧气环境不影响苯酚降解 ;反应溶液酸度越大 ,反应进行得越快 ;样品用量越多、粒径越小 ,越有利于降解反应 ;反应温度升高与振荡速度增大也有利于降解反应的进行 ;共存电解质氯化钠、氯化钙不影响降解反应 ,而磷酸钠与醋酸钠则不利于降解反应。当介质pH值为 2 .1,16 0～ 2 0 0目锰钾矿用量为 10 g/L ,反应温度为 2 5℃ ,振荡速度为 2 0 0r/min ,反应 8h ,对5 0mL浓度为 10 0mg/L苯酚的降解率基本上达到 10 0 % ,达到了工业排放标准。从反应产物初步推断 ,苯酚降解的实质是锰钾矿氧化降解作用 ,为处理苯酚废水增加了一种有效的方法 。According to the redox environmental property of cryptomelane, the phenol degradation in aqueous and acidified suspensions by native cryptomelane has been studied. The results are as follows: First, the degradation rate of 50 mL phenol solution whose concentration is 100 mg/L can almost be up to 100% when pH is 2.1, quantity of mineral is 10 mg/L, grain size of mineral is 160～200 mesh, temperature is 25℃, buffeting speed is 200r/min, and time is 8h. Second, illumination and oxygen don't affect the degradation of phenol. Third, the reaction rate increases when pH decreases. Fourth, the reaction is most likely to take place when the grain size is relatively small while the quantity of mineral, temperature and buffeting speed are comparatively high. Besides, sodium chloride or calcium chloride doesn't affect degradation of phenol, and degradation rate decreases when sodium phosphate or sodium acetate is added to the reaction solution. It has been deduced from the products that degradation of phenol is attributed to the oxidation of cryptomelane. This is an effective method to degrade phenol sewage. This study will extend the application range of cryptomelane.

关 键 词：天然锰钾矿 苯酚 氧化 降解 有机废水 处理方法 

分 类 号：P579[天文地球—矿物学] P618.32[天文地球—地质学]