کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8873484 1623025 2018 36 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Four release tests exhibit variable silver stability from nanoparticle-modified reverse osmosis membranes
ترجمه فارسی عنوان
آزمایش های آزمایشی چهار آزمایش ثبات نقره متغیر را از غشاهای اسمز معکوس اصلاح شده با نانوذرات انجام
کلمات کلیدی
فناوری نانو، ضد باکتری، ریزش مو، انحلال، انتشار بیوفیلم،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
Modification of polyamide reverse osmosis (RO) membranes with silver nanoparticles (AgNP) may effectively control biofouling. While silver leaching tests are usually performed during membrane development, the lack of common testing protocols limits cross-comparison among different labs. We compare four release tests to quantify the release of dissolved and nanoparticulate silver from polyamide RO membranes prepared through in situ surface functionalization: (1) batch immersion, (2) dead-end filtration, (3) cross-flow filtration, and (4) low-pressure water jetting. For the first time, we demonstrated the possibility of AgNP release to membrane-treated water through direct AgNP detachment. When using Nanopure water as an extraction solution, water jetting resulted in the fastest silver mass release, while dead-end filtration caused the slowest release based on the initial release kinetic data. Dead-end filtration exhibited silver mass release an order of magnitude lower than the other three tests. Although cross-flow filtration may best represent the RO membrane operation, quantifying silver release suffers from poor mass balance due to the adsorption of dissolved silver by various reactor components and large volumes of water usage. A commonly applied batch immersion method was low cost and easily performed, but may not induce hydraulic shear sufficient for AgNP detachment from a RO membrane. The information on silver release behavior may depend on the specific test, which is important for assessing antimicrobial efficacy and service life of the nanoparticle-functionalized membranes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 143, 15 October 2018, Pages 77-86
نویسندگان
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