Pairing micropollutants and clay-composite sorbents for efficient water treatment: Filtration and modeling at a pilot scale
| العنوان: | Pairing micropollutants and clay-composite sorbents for efficient water treatment: Filtration and modeling at a pilot scale |
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| المؤلفون: | Noam Dolev, Ido Gardi, Sabino Aurelio Bufo, Filomena Lelario, Yael G. Mishael, Shlomo Nir, Tomas Undabeytia, Laura Scrano |
| المساهمون: | European Commission, Ministerio de Economía y Competitividad (España), Ministry of Science, Technology and Space (Israel) |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Elsevier BV, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Sorbent, Composite number, 020101 civil engineering, Water filtration, 02 engineering and technology, 010501 environmental sciences, 01 natural sciences, 0201 civil engineering, law.invention, Adsorption, Geochemistry and Petrology, law, Desorption, Zeta potential, Nanotechnology, Pesticides, Filtration, 0105 earth and related environmental sciences, Pollutant, Filtration model, Chemistry, Geology, Chemical engineering, Environmental chemistry, Pharmaceuticals, Water treatment, Sorbents |
| الوصف: | 8 páginas.-- 3 figuras.-- 3 tablas.-- 55 referencias.-- Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.clay.2016.12.029. Organically modified clay minerals have been widely developed, tested and employed as sorbents for organic pollutants. However, the process of pollutant-composite pairing is not commonly addressed, which would be valuable for efficient pollutant filtration by such sorbents. This study presents an approach for achieving efficient pollutant removal by large-scale composite filters, based on pairing chemically compatible pollutants and composites and by employing a predictive filtration model. The removal of three organic pollutants, simazine, sulfentrazone and diclofenac by lab-scale filtration columns containing one of three sorbents, a polymer-, micelle- or liposome-clay composite, was measured. Understanding the factors governing pollutant-organic modifier interactions enabled to pair an efficient sorbent to each pollutant. The high removal (80%) of simazine by the polymer composite, was attributed to hydrogen bonds and π-π interactions, compared to less than 20% removal by the surfactant composites. The removal of the anionic diclofenac (pKa = 4.1) was mainly governed by electrostatic attraction, explaining its high removal by the most positively charge sorbent, the liposome composite. Sulfentrazone (pKa = 6.5) removal was mostly affected by micellar solubilization and upon its removal, the zeta potential of the micelle-composite was not reduced as obtained for diclofenac removal. The filtration of the successful pairs was modelled to determine sorbent capacity and adsorption and desorption rate constants. The pilot filtration experiments were well described by the model and demonstrated efficient removal of paired pollutants and sorbents. Model simulations predicted promising treatment at environmental pollutant concentrations in the μg L− 1 range. This pairing approach along with model calculations can be a strong and valid tool for efficient pollutant-sorbent filtration. Supported by The European Commission in the framework of the Project ‘Diffusion nanotechnology based devices for water treatment and recycling – NANOWAT’ [ENPI CBC MED I-B/2.1/049, Grant No. 7/1997]. T. Undabeytia also acknowledges financial support by the Spanish government [FEDER funded grant CTM2013-42306-R]. I. Gardi acknowledges the support by the Israeli Ministry of Science, Technology and Space [grant 3-12362]. |
| تدمد: | 0169-1317 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::badd8eb85f5382b01873c111525b2cd3 https://doi.org/10.1016/j.clay.2016.12.029 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....badd8eb85f5382b01873c111525b2cd3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 01691317 |
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