کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9681081 | 1455510 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of dissolved aluminum in silica chemistry for membrane processes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The use of aluminum sulfate (alum) coagulation prior to reverse osmosis (RO) treatment has been shown to be problematic. Membrane fouling was theorized to occur through soluble aluminum (Al3+) reacting with ambient silica (H4SiO2) to form kaolinite (Al2Si2O5(OH)4) within the RO unit. Chelating agents (citrate at 34 mg/L and ethylenediaminetetraacetic acid [EDTA] at 16 mg/L) were tested for their efficacy in controlling aluminum silicate fouling. The results of bench-scale testing demonstrated that both citrate and EDTA did control aluminum silicate formation, citrate more so than EDTA. Additional aluminum-based fouling was encountered when a commercial, phosphonate-based antiscalant - used to control barium sulfate scaling - reacted with the excess aluminum despite the presence of either citrate or EDTA.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 180, Issues 1â3, 15 August 2005, Pages 307-319
Journal: Desalination - Volume 180, Issues 1â3, 15 August 2005, Pages 307-319
نویسندگان
Christopher J. Gabelich, Wei R. Chen, Tae I. Yun, Bradley M. Coffey, I.H. “Mel” Suffet,