| Title |
A Study on the Positively Charged Filter for Removing Fine Particles in Water |
| Authors |
정성학(Sung-Hak Jung) ; 김종원(Jong-Won Kim) ; 김상희(Sang-Hee Kim) ; 전병헌(Byung-Heon Jeon) ; 이승갑(Seung-Gap Lee) ; 이재근(Jae-Keun Lee) ; 안영철(Young-Chull Ahn) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2012.24.5.454 |
| Keywords |
양전하필터 ; 수중입자 ; 유리섬유 ; 제타포텐셜 Positively charged filter ; Hydrosol ; Glass fiber ; Zeta-potential |
| Abstract |
The purpose of the present work is to investigate the removal characteristics of positively charged filters for capturing negatively charged particles such as bacteria and virus in water. In order to reduce the pressure drop and increase the filtration efficiency, the filter media, modified by charge modifier having positive functional groups, is developed and evaluated. Improved liquid filters have been developed with the modified surface charge to capture and adsorb particles by electrokinetic interaction between the filter surface and particles contained in an aqueous liquid. The positively charged filter media is composed of glass fiber, cellulose and poly-ethylenimine resin for positively charging with the variation of volume ratio. The zeta potential value of the positively charged filter is +37.92 mV at the glass fiber and cellulose content ratio of 50：50 with resin content of 100%, while that of the PSL test particle is -23.5 mV at pH 7. The removal efficiency of the electro-positively charged filter is 98% for PSL particles of 0.11 ㎛, while that of the negatively charged filter is 7%. The positively charged filter media showed the potential to be an effective method for removing fine particles from the contaminated water for liquid filtration. |