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Organics adsorption on novel amorphous silica and silica xerogels: microcolumn rapid breakthrough test coupled with sequential injection analysis
Department of Chemical and Process Engineering, University of Strathclyde.
Department of Chemical and Process Engineering, University of Strathclyde.
Department of Chemistry, Faculty of Sciences, University of the Balearic Islands.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
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2019 (English)In: Journal of Porous Media, ISSN 1091-028X, E-ISSN 1934-0508, Vol. 22, no 8, p. 1001-1014Article in journal (Refereed) Published
Abstract [en]

The adsorption capacities of a novel amorphous silica, and silica xerogels, for aromatic compounds were investigated using Micro Column Rapid Breakthrough tests coupled with Sequential Injection Flow-based automated instrumentation, in order to evaluate their operative feasibility under conditions typically used in water treatment facilities. Extraction columns were fabricated using stereolithographic 3D printing. Sorbent reusability was also investigated using automated flow-based techniques. Benzene was selected as target dissolved organic compound usually present in produced waters from the oil and gas sector, continuously increasing.  3,4-dichloroaniline (3,4-DCA) was selected as part of Endocrine Disrupting Chemicals, which are becoming  source of major concern for human and wildlife toxicity. Novel amorphous silica were synthesised at low temperature and under ambient pressure from a sodium metasilicate precursor, and were subject to post-synthetic methylation. Silica xerogels were prepared via acid catalysis of a sodium metasilicate solution and functionalised with trimethylchlorosilane, at low temperature and under ambient pressure. The removal efficiency of the silica xerogels tested was found equal greater than 22.62 mg/g for benzene at a flow rate of 0.6 mL/min, while the uptake of 3,4-DCA was found >4.63 mg/g and >7.17 mg/g, respectively at flow rates of 1.8 mL/min and 0.6 mL/min.

Place, publisher, year, edition, pages
Begell House, 2019. Vol. 22, no 8, p. 1001-1014
Keywords [en]
SIA, SPE, 3, 4-DCA, EDCs, 3D printing, benzene, breakthrough curves
National Category
Engineering and Technology Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-383258DOI: 10.1615/JPorMedia.2019024612ISI: 000485125800008OAI: oai:DiVA.org:uu-383258DiVA, id: diva2:1315134
Available from: 2019-05-12 Created: 2019-05-12 Last updated: 2019-10-11Bibliographically approved
In thesis
1. Characterization of a silica based nano/mesoporous material for adsorption application: A study of the relation between synthesis, structure and adsorption efficiency
Open this publication in new window or tab >>Characterization of a silica based nano/mesoporous material for adsorption application: A study of the relation between synthesis, structure and adsorption efficiency
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

During last years the interest in large scale production of nano/mesoporous materials has increased in the industry due to benefits that these materials can provide. Silica based nanomaterials are examples of such materials with large specific surface area and pore volume where the porous structure is the key for the resulting properties leading to efficiency in e.g. filtration applications.

The aim of this research was to contribute knowledge on understanding the porous structure and its relation to the efficiency. For this approach, the porous structure of a nano/mesoporous silica-based material is characterized. The analysis of this material is a challenge as it has a wide range of pores in the structure from a few nanometres to several micrometres. Electron microscopy (EM) methods are used for the structural analysis of the materials as a complementary method to nitrogen adsorption (NA). The samples are analysed as powders and the relation between the structure and efficiency in the application is discussed.

Through this research different synthesis pathways have been studied under the family name of Quartzene®, and the differences in the resulting structure is discussed. The synthesis and storage conditions have been varied in order to study the effect on the porous structure.

Place, publisher, year, edition, pages
Department of Engineering Sciences, 2019. p. 77
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-383286 (URN)
Presentation
2019-06-10, Polhemsalen, Lägerhyddsvägen 1, Ångströmlaboratoriet, Uppsala, 10:00 (English)
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Supervisors
Available from: 2019-05-20 Created: 2019-05-13 Last updated: 2019-05-24Bibliographically approved

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Ghajeri, Farnaz

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