Mineral Scaling on Reverse Osmosis Membranes: Role of Mass, Orientation, and Crystallinity on Permeability
العنوان: | Mineral Scaling on Reverse Osmosis Membranes: Role of Mass, Orientation, and Crystallinity on Permeability |
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المؤلفون: | Bo Cao, Yandi Hu, Debora F. Rodrigues, Meng Wang |
المصدر: | Environmental Science & Technology. 55:16110-16119 |
بيانات النشر: | American Chemical Society (ACS), 2021. |
سنة النشر: | 2021 |
مصطلحات موضوعية: | Minerals, Osmosis, Gypsum, Membrane permeability, Chemistry, Membranes, Artificial, General Chemistry, engineering.material, Permeability, Water Purification, Crystallinity, Bassanite, Membrane, Chemical engineering, Permeability (electromagnetism), engineering, Environmental Chemistry, Saturation (chemistry), Reverse osmosis |
الوصف: | Prior mineral scaling investigations mainly studied the effects of membrane surface properties rather than on the mineral properties and their impact on membrane permeability. In our study, mass, crystal growth orientation, and crystallinity of mineral precipitates on membranes, as well as their effects on membrane permeability have been investigated. Gypsum scaling tests on bare and bovine serum albumin (BSA)-conditioned membranes were conducted under different saturation indices. Results show that a longer scaling period was required for BSA-conditioned membranes to reach the same membrane permeate flux decline as bare membranes. Though the final reduced permeability was the same for both two membranes, the masses of the mineral precipitates on BSA-conditioned membranes were around two times more than those on bare membranes. Further mineral characterizations confirmed that different permeability decay rates of both types of the membrane were attributed to the differences in growth orientations rather than amounts of gypsum precipitates. Moreover, BSA-conditioned layers with high carboxylic density and specific molecular structure could stabilize bassanite and disrupt the oriented growth to inhibit the formation of needle-like gypsum crystals as observed on bare membranes, thus resulting in lower surface coverage with scales on membranes and alleviating the detrimental scaling effect on membrane permeability. |
تدمد: | 1520-5851 0013-936X |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae5aaff5af6bfab933951e3deac21a98 https://doi.org/10.1021/acs.est.1c04143 |
حقوق: | CLOSED |
رقم الأكسشن: | edsair.doi.dedup.....ae5aaff5af6bfab933951e3deac21a98 |
قاعدة البيانات: | OpenAIRE |
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