کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
627255 1455461 2008 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of the Paradox Valley brine desulfation by nanofiltration
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Analysis of the Paradox Valley brine desulfation by nanofiltration
چکیده انگلیسی

For pressure-driven membranes such as nanofiltration (NF), a procedure based on the modified film-theory model (MFTM) is presented to predict actual ion rejection (Ra) and ion concentrations at the membrane surface (Cm) in the presence of significant concentration polarization effects. Reported NF data for the desulfation of Paradox Valley brine (PVB) is employed to evaluate the MFTM. The predicted values of Ra and Cm are essential to determine: (1) actual osmotic pressures differences across the membrane; and (2) saturation degrees of sparingly soluble scale species that precipitate on the membrane surface and inside the pores of the membrane. The operating cost for desulfating the PVB by NF is directly proportional to the cost of: (1) power consumption for applying higher operating pressures to exceed osmotic pressures across the membrane and achieve acceptable levels of throughput; (2) chemicals to inhibit and/or dissolve scale precipitates; and (3) membrane cleanup and replacement.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 229, Issues 1–3, 15 September 2008, Pages 33-51