红壤胶体铁氧化物界面有机氯的非生物转化研究进展  

Reviews on abiotic transformation of organchlorines on the interface of iron oxides and water in red soil colloids

作　　者：李芳柏[1] 王旭刚[1] 周顺桂[1] 刘承帅[1] 

机构地区：[1]广东省生态环境与土壤研究所//广东省农业环境综合治理重点实验室,广东广州510650

出　　处：《生态环境》2006年第6期1343-1351,共9页Ecology and Environmnet

基　　金：国家自然科学基金项目(20377011);广东省自然科学基金重点项目(036533)

摘　　要：综述了红壤胶体铁氧化物的结构、形态及其转化;铁氧化物界面有机氯的非生物转化过程及其影响因素;异化铁还原作用下的有机氯转化过程。有机氯的非生物转化主要包括氧化转化与脱氯转化过程。氧化转化包括暗态下的化学氧化与光化学氧化过程;脱氯转化包括脱氢卤化、加氢脱氯、脱双卤、二聚脱氯与亲核置换脱氯等反应过程。有机氯的非生物转化主要受胶体界面pH、Eh、水溶性有机物、金属离子、铁氧化物形态与铁还原细菌等的显著影响。有机氯非生物转化的化学-微生物耦合机制、复合污染条件下重金属对界面有机氯非生物转化过程的影响机制、红壤胶体界面有机氯污染的综合调控技术方法等三个方面值得关注,有助于推动土壤胶体界面环境化学的发展。The aims of this paper are to review 1） the chemical structure and transformation of iron oxides in red soil colloid; 2） abiotic transformation process of organchlorines and its affecting factors on the interface of iron oxides and water; and 3） abiotic transformation process of organchlorines under the condition ofdissimilatory reduction of iron oxides. Generally, abiotic transformation process of organchlorines include two different process, oxidized transformation and reductive dechlorination. The oxidized transformation processes mainly include chemical oxidation in the dark and photo-oxidation under light irradiation, while the reductive dechlorination process mainly include dehydrohalogenation, hydrogenolysis, dihalo-elimination, coupling and nucleophilic substitution and so on. Abiotic transformation process strongly depend on the colloid surface properties such as pH, Eh, dissolved organic matter, metal ions, the chemical structure of iron oxides and dissimilatory reductive bacteria. It should be noticeable to some vital environmental interracial process, including the synergetic effect of chemical mechanisms and microbiological mechanisms, the effects of heavy metal ions on the abiotic transformation in the existence of heavy metals and organchlorines together, the integrated techniques for control and remediation of organchlorines contamination during abiotic transformation of organchlorines. This paper will be give a new insight to environmental interracial process for red soils.

关 键 词：红壤胶体 铁氧化物 有机氯 非生物转化 界面 

分 类 号：X131.3[环境科学与工程—环境科学]