Journal article
Efficient pre-concentration of As(III) in food samples using guanidine-modified magnetic mesoporous silica
Journal of porous materials, v 27(4), pp 971-978
01 Aug 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
An efficient magnetic mesoporous structure was designed and prepared for the facile pre-concentration of As(III) ions. To prepare the sorbent, core-shell magnetic silica nanoparticles were covered by MCM-41 like structure and then the surface was modified by guanidine via an amine linker (GA-MSMP). The prepared adsorbent was investigated as an effective and sensitive material for the adsorption of arsenic ions from the aqueous solution by applying a normal batch method. The imperative variables of the adsorption were studied to increase efficiency. The dynamic and static processes were tested that matched a pseudo-second-order of kinetic model and the Langmuir isotherm model, respectively. The sorbent reusability was investigated and it was confirmed that the designed product could be applied at best for six cycles successively without any significant efficiency losing. The synthesized product was tested to determine and pre-concentrate trace amounts of arsenic ions in rice and natural waters as a real sample. A desorption process applying 5 mL of hydrochloric acid (0.5 mol L-1) as an eluent, exhibited about 98% recovery of the As(III) ions adsorbed on the GA-MSMP sorbent. The maximum adsorption capacity of the GA-MSMP was calculated to be 312 mg g(-1) for adsorption of As(III) under the optimal conditions.
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Details
- Title
- Efficient pre-concentration of As(III) in food samples using guanidine-modified magnetic mesoporous silica
- Creators
- Majede Modheji - Islamic Azad University North Tehran BranchHamid Emadi - University of MazandaranHossein Vojoudi (Corresponding Author) - University of Tehran
- Publication Details
- Journal of porous materials, v 27(4), pp 971-978
- Publisher
- Springer Nature
- Number of pages
- 8
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000520664200001
- Scopus ID
- 2-s2.0-85081955508
- Other Identifier
- 991022089046404721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Applied
- Chemistry, Physical
- Materials Science, Multidisciplinary