کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
632720 | 1456004 | 2015 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transformation of end-of-life RO membranes into NF and UF membranes: Evaluation of membrane performance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Economic and environmental concerns demand the recycling and reuse of fouled, end-of-life, reverse osmosis (RO) membranes. Different dry stored coupons of commercial TM720-400 membranes were subjected to the chemical attack of NaOCl (124Â ppm free chlorine), acetone solution (10,000Â ppm) or N-methyl-2-pyrrolidone solution (10,000Â ppm). The best permeability results were achieved with NaOCl solution and consequently it was used as the key reagent for further analysis. The effect of pH and membrane storage on the transformation process was evaluated. Membrane permeability and rejection coefficients were tested filtering synthetic brackish water containing NaCl (2,000Â ppm), MgSO4 (2,000Â ppm) and dextrose (250Â ppm). The basic pH showed the highest effect on the membranes performance therefore, experiments were carried out up to 410Â h exposure time. The transforming process was repeated for five different commercial membrane brands, stored wet. Most of the transformed membranes achieved permeability and rejection like nanofiltration (NF) membranes up to 50Â h exposure time and performed like ultrafiltration (UF) membranes after 242Â h exposure time. It was observed that permeability and rejection coefficients were affected by the storage condition. This treatment may provide a cost effective and eco-friendly method of recycling end-of-life RO membrane process, at lab scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 495, 1 December 2015, Pages 305-315
Journal: Journal of Membrane Science - Volume 495, 1 December 2015, Pages 305-315
نویسندگان
Raquel GarcÃa-Pacheco, Junkal Landaburu-Aguirre, Serena Molina, Laura RodrÃguez-Sáez, Shivanand B. Teli, Eloy GarcÃa-Calvo,