天然锰钾矿氧化降解水体中苯酚机理研究  

Mechanism of oxidation and degradation of phenol in water by natural cryptomelane

作　　者：李改云 鲁安怀[2] 饶竹[3] 

机构地区：[1]北京市恒聚油田化学剂有限公司,北京101109 [2]北京大学地球与空间科学学院,北京100871 [3]国家地质实验测试中心,北京100037

出　　处：《岩石矿物学杂志》2003年第4期365-368,共4页Acta Petrologica et Mineralogica

基　　金：国家重大基础研究前期研究专项资助项目 ( 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：根据锰的溶出、氧气不参与反应、酸度是影响苯酚降解的主要因素等实验结果 ,推测天然锰钾矿与苯酚的作用机制。研究表明 :反应 8h ,总有机碳去除率达 88.7% ;锰钾矿在硝酸存在时产生的氧自由基与苯酚发生氧化还原反应 ,使苯酚降解。根据检出的对苯醌、联苯二酚。In order to confirm that products of phenol degradation by natural cryptomelane are innoxious, the authors conducted qualitative analysis of organic products and determined TOC of solution, thus detecting the oxidation routes of phenol. The oxidation mechanism of phenol is inferred on the basis of some experimental phenomena. The results are as follows: first, TOC can be reduced by 88.7% after the oxidation of phenol wastewater for eight hours; second, oxygen in Mn(Ⅳ)—O bond in cryptomelane changes into O· after it donates two electrons to Mn(Ⅳ), and then O· oxidizes phenol and its resultants are adsorbed on minerals. Some important intermediates detected in GC_MS experiments are p_benzoquinone, 2_benzofuranol and 4,4'_diol_1,1'_biphenyl, and the reaction routes of phenol oxidation are deduced by these intermediates.

关 键 词：天然锰钾矿 苯酚 废水处理 氧化还原反应 降解 作用机制 反应途径 

分 类 号：X703.1[环境科学与工程—环境工程] P578.4[天文地球—矿物学]