کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9681189 | 1455513 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Relationship between feed pH and permeate pH in reverse osmosis with town water as feed
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
The relationship between feed pH and permeate pH in the reverse osmosis (RO) process was investigated in a pH range of 1.6-7.0 when town water was used as feed. Three types of flat-sheet RO membranes with varying isoelectric points in a pH range of 3.2-6.5 were tested in the laboratory. The experimental results showed that for each RO membrane tested, there was a critical feed pH, below which RO permeate pH was higher than feed pH, but above which RO permeate pH was lower than feed pH. The critical feed pH for all membranes was 4.4-4.5, which was independent on the isoelectric point of the RO membrane used. Explanations on the constant critical feed pH are offered. The existence of HCOâ3 in the feed and its transmission in the RO process may play a key role on the critical feed pH, which has not been reported previously.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 177, Issues 1â3, 20 June 2005, Pages 267-272
Journal: Desalination - Volume 177, Issues 1â3, 20 June 2005, Pages 267-272
نویسندگان
Jian-Jun Qin, Maung Htun Oo, Bruno Coniglio,