国产精品视频一区二区三区四,亚洲av美洲av综合av,99国内精品久久久久久久,欧美电影一区二区三区电影

產(chǎn)品推薦:氣相|液相|光譜|質(zhì)譜|電化學|元素分析|水分測定儀|樣品前處理|試驗機|培養(yǎng)箱


化工儀器網(wǎng)>技術(shù)中心>其他文章>正文

歡迎聯(lián)系我

有什么可以幫您? 在線咨詢

In Situ Healing of Compromised Membranes via Polyethylenimine-Functionalized Silica Microparticles

來源:美國布魯克海文儀器公司   2019年04月16日 09:12  
 作者:Sang-Ryoung Kim, Bezawit A. Getachew, and Jae-Hong Kim

Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States 

 

 

摘要:Microscale damages to membranes used in large-scale filtration processes for water treatment can result in severe degradation of product water quality. One promising technology to address this issue is in situ healing of compromised membranes via healing agents that are added to the feed side of a membrane system and seal the defect site because of increased hydraulic drag through damage site during filtration. We herein introduce an improved in situ membrane healing method using amine-functionalized silica microparticles that is effective under varying operating conditions, overcoming limitations faced by previous healing agents such as chitosan agglomerates. The silica microparticles are functionalized with branched polyethylenimine (PEI) molecules for efficient interparticle cross-linking with glutaraldehyde. The PEI-decorated silica microparticles (SiO2@PEI MPs) were characterized using scanning electron microscopy, dynamic light scattering, and zeta potential analysis. This study investigates the selective deposition of the SiO2@PEI MPs on the damage area using confocal laser scanning microscopy under variable cross-flow rate (0.52.0 L/min) and flushing time (10 to 30 min) conditions. The in situ healing technique recovered the particle rejection of compromised membranes to 99.1% of the original membranes performance without any flux decline. The results of this study show that the use of SiO2@PEI MPs is a promising and practical approach to ensure membrane process integrity.

免責聲明

  • 凡本網(wǎng)注明“來源:化工儀器網(wǎng)”的所有作品,均為浙江興旺寶明通網(wǎng)絡(luò)有限公司-化工儀器網(wǎng)合法擁有版權(quán)或有權(quán)使用的作品,未經(jīng)本網(wǎng)授權(quán)不得轉(zhuǎn)載、摘編或利用其它方式使用上述作品。已經(jīng)本網(wǎng)授權(quán)使用作品的,應(yīng)在授權(quán)范圍內(nèi)使用,并注明“來源:化工儀器網(wǎng)”。違反上述聲明者,本網(wǎng)將追究其相關(guān)法律責任。
  • 本網(wǎng)轉(zhuǎn)載并注明自其他來源(非化工儀器網(wǎng))的作品,目的在于傳遞更多信息,并不代表本網(wǎng)贊同其觀點和對其真實性負責,不承擔此類作品侵權(quán)行為的直接責任及連帶責任。其他媒體、網(wǎng)站或個人從本網(wǎng)轉(zhuǎn)載時,必須保留本網(wǎng)注明的作品第一來源,并自負版權(quán)等法律責任。
  • 如涉及作品內(nèi)容、版權(quán)等問題,請在作品發(fā)表之日起一周內(nèi)與本網(wǎng)聯(lián)系,否則視為放棄相關(guān)權(quán)利。
企業(yè)未開通此功能
詳詢客服 : 0571-87858618
错那县| 万山特区| 垦利县| 石棉县| 江达县| 佛冈县| 镇平县| 高清| 纳雍县| 长寿区| 和林格尔县| 黄梅县| 锡林郭勒盟| 都江堰市| 沁阳市| 商洛市| 黎城县| 张家港市| 石首市| 屯昌县| 若羌县| 岳普湖县| 库伦旗| 黑龙江省| 耒阳市| 普格县| 广宁县| 永丰县| 韶关市| 兴和县| 溧阳市| 昌吉市| 合水县| 潼关县| 安丘市| 乌拉特中旗| 靖远县| 新营市| 宜都市| 崇文区| 宁远县|