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dc.contributor.authorAlzahrani, Norah
dc.date.accessioned2019-06-26T13:19:04Z
dc.date.available2019-06-26T13:19:04Z
dc.date.issued2019-01-27
dc.identifier.urihttp://hdl.handle.net/10754/655777
dc.description.abstractABSTRACT The present study reports the use of nanisized zinc oxide nanoparticle(ZnO NPs) treated polyurethane foams (PUFs) solid sorbent for removal of phosphate ions from environmental water samples. The effect of various parameters that control the effect of phosphate ions uptake by the used solid sorbent such as shaking time, pH, molybdate concentrations, polarity of the extraction media was critically investigated. The kinetics of phosphate uptake fitted well with pseudo second order kinetics. The sorption data were also subjected to Freundlich and Langmuir sorption models. A Proposed dual sorption mechanism involving solvent extraction via an anion ion exchange and an added Component of adsorption is suggested. The sorbent was packed effectived in packed column for complete retention and recovery from water. Introduction Phosphate species are important class of chemicals and serves as essential nutrients for the health and hygiene of living organisms. However, its excessive supply to waters via human activities together with nitrogen compounds e.g. NO3 and/ or NO2-, contributes to the eutrophication in the aquatic environment resulting in the production of algal blooms 1, 2. In response to such major environmental problem, different techniques e.g. chemical and/or biological treatment have been reported for phosphorus removal 3.The removal of phosphate species is still challenging due to its lower limit of detection in oceans and sea water. Recently, there is a need for developing eco-friendly procedures for inorganic and organic pollutants in water based on sample preconcentration used low cost sold sorbent 8, 9. Modified polyurethane foams (PUFs) solid sorbents have become the most valuable technique to classical solid phase extraction (SPE) for enrichment of inorganic ions in water 10, 11. Thus, the work herein is focused on: i) Studying the retention of ZnO treated PUFs sorbent towards phosphate ions in aqueous media for the first time; ii) Assigning the specificity and extraction mechanism of ZnO functionalized immobilized on/in the surface of CV immobilized PUFs extractor towards phosphate in water; iii) Evaluating the performance of ZnO NPs treated CV -PUFs packed column in terms the height equivalent (HETP) and number (N) of the theoretical plate, critical and breakthrough capacities of the sorbent packed column and finally iv) Developing a simple ZnO NPs treated PUFs sorbent packed column for enrichment and determination of trace levels of phosphate ions combined with IC . Method Result CONCLUSIONS Zn NPs treated polyurethane foams (PUFs) was used as a low cost and efficient SPE for preconcentration and subsequent trace determination of phosphate in water samples .Modified PUFs sorbent can be used as an alternative to other preconcentration techniques since it offers many advantages e.g. avoiding the use of organic solvents, low cost, simplicity, convenience and high extraction efficiency compared to several conventional adsorbents including powdered activated carbon for phosphate removal from water samples. Modified PUFS packed column could be reused several times without decrease in its performance. Based on the data obtained “ a dual mode of separation ” is proposed. A rationale techno-economic sense for an organization to a prudent environmental management program can be proposed.
dc.relation.urlhttps://epostersonline.com/nano2019/node/18
dc.titleZinc oxide nanoparticles physically treated polyurethane foam sorbent for sorption of trace levels of phosphate in water
dc.typePoster
dc.conference.dateJAN 27-29,2025
dc.conference.nameKAUST Research Conference 2019 - Nano-Enabled Water Technologies: Opportunities and Challenges
dc.conference.locationKAUST
refterms.dateFOA2019-06-26T13:19:04Z


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