本研究之目的係利用表面改質之醋酸纖維素微孔濾膜吸附廢水中之二價銅離子。濾膜表面改質係將能與二價銅離子產生螯合鍵結反應之.基，引入醋酸纖維素濾膜表面結構，以吸附廢水中之二價銅離子。本研究使用之表面改質反應包括鹼性水解、過碘酸根氧化與席夫置換三個化學反應，將醋酸纖維素濾膜表面結構之部份雙羥基與乙醯基轉換成為.基。表面改質反應造成濾膜官能基之含量變化並經化學定量與反應動力學分析，估計經過表面改質之濾膜單位面積之.基含量為7.8 × 10.7 mol/cm2。平衡吸附實驗結果顯示，對於濃度50 mg/L 之二價銅離子酸性廢水，經表面改質之濾膜單位面積吸附之二價銅離子平均重量為0.082 mg/cm2；單位重量之濾膜吸附之二價銅離子平均重量為12.4 mg/g。

The objective of the present study is to utilize a surface-functionalized
cellulose acetate microfiltration membrane to remove cupric ion from
wastewater. The surface functionalization of the cellulose acetate
membrane was achieved by chemically transforming the membrane surface
functional groups into oxime groups capable of chelating cupric ion.
Three reactions were employed for the surface functionalization including
alkaline hydrolysis, periodate oxidation, and Schiff’s replacement reactions.The variations in the functional groups of the membrane due to the three reactions were quantified chemically and analyzed kinetically. The average amount of oxime groups after the surface functionalization was
estimated to be 7.8 × 10.7 mol/cm2 of the membrane area. By performing
equilibrium sorption experiments for acidic wastewater having a cupric ion
concentration of 50 mg/L, it was found that the membrane is capable of
collecting cupric ion 0.082 mg/cm2 of the membrane area, corresponding to
12.4 mg/g of the membrane weight.