高锰酸钾缓释剂的制备及其性能研究  

Preparation and characteristics of controlled release potassium permanganate

作　　者：陈艳美[1] 李小婷[1] 苑宝玲[1] 

机构地区：[1]福州大学土木工程学院,福州350108

出　　处：《环境工程学报》2010年第5期1052-1056,共5页Chinese Journal of Environmental Engineering

基　　金：福建省自然科学基金资助项目(2009J01244);国家自然科学基金资助项目(50978059)

摘　　要：利用油相相分离法微胶囊技术,以硬脂酸为壳物质,制备高锰酸钾缓释剂,通过条件优化实验,确定最佳工艺条件为:壳核比值为3∶1、搅拌速度450 r/min以及超声时间为10 min。所制的高锰酸钾缓释剂包覆率为163.3%,在水中缓释行为符合Q=0.00518×t0.611(R2=0.9951)动力学方程,理论缓释期为229.4 d,具有较好的缓释效果。对高锰酸钾缓释剂进行红外光谱和环境电镜扫描分析,结果表明,成膜前后硬脂酸的结构发生改变,硬脂酸对高锰酸钾的微胶囊化不是简单的物理吸附,而是通过化学键合包覆在高锰酸钾表面。In order to remediate the DNAPLs pollution in ground water,the preparation and characterization of the encapsulated KMnO4 particles by stearic acid was studied.The purpose of encapsulated KMnO4 particles by phase separation method was to create microcapsules with slow-release properties.The encapsulation rate can be up to 163.3% when the ratio of stearic acid and KMnO4 was 3∶1,stirring speed at 450 r/min and ultrasonic time was 10 min.The release kinetics of encapsulated KMnO4 particles was in good agreement with Q=ktn model and the theoretical time of the encapsulated KMnO4 to release permanganate into water continually were 229.4 d under the above conditions of preparation.The characteristics of encapsulated KMnO4 by IR and SEM analysis showed that the structure of stearic acid was decomposed during the encapsulation process,while stearic acid was bonded chemically into the surface of KMnO4,rather than adsorbed physically.

关 键 词：硬脂酸 高锰酸钾 包覆 缓释 

分 类 号：X52[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]