Preparation and Characterization of Encapsulated Potassium Ferrate as an in Situ Ozidant for Remediation of Ground Water
To enhance stability of ferrate in aqueous solution and ability of in-situ oxidation of the target pollutant (chlorinated hydrocarbon) in ground water, the preparation and characterization of encapsulated K2FeO4 particles were studied. Encapsulated potassium ferrate was prepared by Molten Dispersion and Cooling Method, with the paraffin wax as a shell and K2FeO4 as a core. Experimental results showed that the diameters of the encapsulated K2FeO4 particles were in 1-3 mm and the ratio of encapsulation might reach about 68.2% at 250 rpm of stirring speed in 15 mL of emulsifier when the mass ratios of shell and core were 10:1. The release of encapsulated K2FeO4 particles in water increased with the increasing of the concentration of TCE (chlorinated hydrocarbon). When the encapsulated K2FeO4 particles (0.05 g, 10:1 wax/ferrate) were put into TCE solution (0.06 g·mL-1), the core of K2FeO4 was rapidly released within 15 mins as the paraffin was dissolved completely. The characterization of encapsulated K2FeO4 particles by FTIR, XRD and SEM showed that the encapsulated particles had core-shell structure and the core of K2FeO4 remained good activity and stability during the whole encapsulated process.
paraffin ferrate encapsulation dispersing method controlled release
LIN Sifa YUAN Baoling LI Yunqin ZHOU Hairui
State Key Laboratory Breeding Base of Photocatalysis,Department of Environmental Science and Engineering,Fuzhou University,Fuzhou 350002,Fujian,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1779-1783
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）