Details

Autor(en) / Beteiligte

• Yi, X.S
• Shi, W.X
• S.L.Yu
• Ma, C
• Sun, N
• Wang, S
• Jin, L.M
• Sun, L.P

Titel

Optimization of complex conditions by response surface methodology for APAM–oil/water emulsion removal from aqua solutions using nano-sized TiO₂/Al₂O₃ PVDF ultrafiltration membrane

Ist Teil von

• Journal of hazardous materials, 2011-10, Vol.193, p.37-44

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2011

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• This paper studies the cumulative effect of various parameters, namely anionic polyacrylamide (APAM) concentration, oil concentration, pH, trans-membrane pressure (TMP), and total dissolved solid (TDS), and obtains optimal parameters for the minimum relative flux (J/J₀) declining in aqueous solutions with response surface methodology (RSM). In order to analyze the mutual interaction and optimal values of parameters affecting ultrafiltration, a central composite rotatable design (CCRD), one method of RSM, was employed. The analysis of variance (ANOVA) of the cubic polynomial model demonstrated that this model was highly significant and reliable. The results show that the effect of APAM and oil on J/J₀ has an inverse trend with pH value increasing. Moreover, the mutual interaction of initial APAM (oil) concentration (CAPAM₍ₒᵢₗ₎) and pH (TMP) were negligible, while the mutual interaction of CAPAM and Cₒᵢₗ has an obvious effect, i.e. the effect of initial feed CAPAM became more important at higher values of initial feed Cₒᵢₗ, and the J/J₀ was only about 4%. The favorable operate conditions in this ultrafiltration process were at low CAPAM, Cₒᵢₗ, pH, and TMP, which agreed with the conclusions of many authors, while considering water production, CAPAM and Cₒᵢₗ<50mg/L, pH<4, and TMP<0.075MPa could be accepted.