CAJ | 학술논문

采用紫外光辐照接枝法制备了2种聚砜中空纤维纳滤膜，重点研究它们在六价铬离子Cr（VI）去除中的应用.扫描电子显微镜（SEM）分析表明丙烯酸成功接枝到膜表面上；截留性能测试表明所制备的纳滤膜对无机盐的截留率顺序为：Na2SO4>MgSO4>NaCl>MgCl2，这与一般荷负电纳滤膜的顺序是相似的.考察了pH值、进料液浓度和操作压力对Cr（VI）去除效果的影响.结果表明：纳滤膜对Cr（VI）的截留率随pH值的增大而增大，当pH=10时，NF1和NF2膜对Cr（VI）的截留率分别为92.36%和95.62%；纳滤膜对Cr（VI）的截留率随着进料液浓度的增大而迅速减小，同时渗透通量也稍有下降；纳滤膜对Cr（VI）溶液的渗透通量随着操作压力的增大几乎呈线性增大的趋势，但截留率基本维持恒定.
채용자외광복조접지법제비료2충취풍중공섬유납려막，중점연구타문재륙개락리자Cr（VI）거제중적응용.소묘전자현미경（SEM）분석표명병희산성공접지도막표면상；절류성능측시표명소제비적납려막대무궤염적절류솔순서위：Na2SO4>MgSO4>NaCl>MgCl2，저여일반하부전납려막적순서시상사적.고찰료pH치、진료액농도화조작압력대Cr（VI）거제효과적영향.결과표명：납려막대Cr（VI）적절류솔수pH치적증대이증대，당pH=10시，NF1화NF2막대Cr（VI）적절류솔분별위92.36%화95.62%；납려막대Cr（VI）적절류솔수착진료액농도적증대이신속감소，동시삼투통량야초유하강；납려막대Cr（VI）용액적삼투통량수착조작압력적증대궤호정선성증대적추세，단절류솔기본유지항정.
Two kinds of polysulfone(PSF) nanofiltration hollow fiber membrane were prepared by UV photografting polymer-ization for the removal of Cr (VI). The scanning electron microscopy analysis indicated that acrylic acid (AA) was successfully grafted on membrane surface. Nanofiltration performance test revealed that the prepared NF mem-brane showed different rejection to electrolytes in a sequence of Na2SO4> MgSO4> NaCl >MgCl2, which was similar to the sequence of negatively charged nanofiltration membranes. The factors affecting the rejection and permeate flux such as pH, feed concentration, and applied pressure were investigated. The result showed that the rejection rate of Cr(VI) was increased with the increase of pH, when the pH was 10, the rejection rate to Cr (VI) of NF1 and NF2 was 92.36%and 95.62%, respectively. The rejection rate was decreased dramatically as the feed concentration increased, in the meantime, the permeate flux was decreased slightly. The permeate flux increased linearly with the increase of applied pressure while the rejection rate almost remained the same.