Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites
The adsorption of a cationic dye, Methylene blue (MB), and a zwitterionic dye, 8-Hydroxyquinoline (8-HQ), onto zeolites synthesized from different clays has been investigated. The presence of certain metals and the Si/Al ratio of the parent clay has an overall effect on the type of zeolites produced...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023072572 |
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| author | Elizabeth Von-Kiti William Owusu Oduro Maame Adwoa Animpong Kofi Ampomah-Benefo Gloria Boafo-Mensah Bright Kwakye-Awuah Craig Denver Williams |
| author_facet | Elizabeth Von-Kiti William Owusu Oduro Maame Adwoa Animpong Kofi Ampomah-Benefo Gloria Boafo-Mensah Bright Kwakye-Awuah Craig Denver Williams |
| author_sort | Elizabeth Von-Kiti |
| collection | DOAJ |
| description | The adsorption of a cationic dye, Methylene blue (MB), and a zwitterionic dye, 8-Hydroxyquinoline (8-HQ), onto zeolites synthesized from different clays has been investigated. The presence of certain metals and the Si/Al ratio of the parent clay has an overall effect on the type of zeolites produced. Zeolites LTA and FAU Y were obtained using the hydrothermal method. X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) spectral analysis was used to study the adsorption phenomena of the adsorbates on the adsorbents. The adsorption profile of MB (Topological Polar Surface Area (TPSA) 43.9 Å2 and 8-HQ (TPSA 33.1 Å2) compared favourably with a Freundlich isotherm with R2 > 0.9 for all the zeolitic materials synthesized. Adsorption capacities of zeolite FAU was significantly different from zeolite LTA for MB removal. The higher adsorption capacity of zeolite FAU was attributed to geometric effects resulting in greater shrinkage in the inter lattice spacing of zeolite LTA leading to a reduction in surface area. Adsorption of the relatively smaller 8-HQ however, did not show significant difference in the two zeolite types. Surface and structural characterization showed that adsorbates/adsorbents interactions were driven by both geometric (inter lattice spacing which imparts higher surface area of the adsorbent) and electronic (electrostatic repulsions through electron back donation from metals in the zeolitic structure) considerations. |
| first_indexed | 2024-03-11T20:49:33Z |
| format | Article |
| id | doaj.art-558d8509c1194feaa34991ff77dab6d6 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-11T20:49:33Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-558d8509c1194feaa34991ff77dab6d62023-10-01T06:02:23ZengElsevierHeliyon2405-84402023-09-0199e20049Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolitesElizabeth Von-Kiti0William Owusu Oduro1Maame Adwoa Animpong2Kofi Ampomah-Benefo3Gloria Boafo-Mensah4Bright Kwakye-Awuah5Craig Denver Williams6Materials and Manufacturing Division, Council for Scientific and Industrial Research –Institute of Industrial Research (CSIR-IIR), Accra, Ghana; Corresponding author. Materials and Manufacturing Division, Council for Scientific and Industrial Research –Institute of Industrial Research (CSIR-IIR), Accra, Ghana.Materials and Manufacturing Division, Council for Scientific and Industrial Research –Institute of Industrial Research (CSIR-IIR), Accra, GhanaMaterials and Manufacturing Division, Council for Scientific and Industrial Research –Institute of Industrial Research (CSIR-IIR), Accra, GhanaMaterials and Manufacturing Division, Council for Scientific and Industrial Research –Institute of Industrial Research (CSIR-IIR), Accra, GhanaMaterials and Manufacturing Division, Council for Scientific and Industrial Research –Institute of Industrial Research (CSIR-IIR), Accra, GhanaDepartment of Physics, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaSchool of Sciences and Engineering, University of Wolverhampton, Wolverhampton, UKThe adsorption of a cationic dye, Methylene blue (MB), and a zwitterionic dye, 8-Hydroxyquinoline (8-HQ), onto zeolites synthesized from different clays has been investigated. The presence of certain metals and the Si/Al ratio of the parent clay has an overall effect on the type of zeolites produced. Zeolites LTA and FAU Y were obtained using the hydrothermal method. X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) spectral analysis was used to study the adsorption phenomena of the adsorbates on the adsorbents. The adsorption profile of MB (Topological Polar Surface Area (TPSA) 43.9 Å2 and 8-HQ (TPSA 33.1 Å2) compared favourably with a Freundlich isotherm with R2 > 0.9 for all the zeolitic materials synthesized. Adsorption capacities of zeolite FAU was significantly different from zeolite LTA for MB removal. The higher adsorption capacity of zeolite FAU was attributed to geometric effects resulting in greater shrinkage in the inter lattice spacing of zeolite LTA leading to a reduction in surface area. Adsorption of the relatively smaller 8-HQ however, did not show significant difference in the two zeolite types. Surface and structural characterization showed that adsorbates/adsorbents interactions were driven by both geometric (inter lattice spacing which imparts higher surface area of the adsorbent) and electronic (electrostatic repulsions through electron back donation from metals in the zeolitic structure) considerations.http://www.sciencedirect.com/science/article/pii/S2405844023072572AdsorptionZwitterionic dyesFreundlich isothermElectrostatic and geometric effectsCharacterization |
| spellingShingle | Elizabeth Von-Kiti William Owusu Oduro Maame Adwoa Animpong Kofi Ampomah-Benefo Gloria Boafo-Mensah Bright Kwakye-Awuah Craig Denver Williams Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites Heliyon Adsorption Zwitterionic dyes Freundlich isotherm Electrostatic and geometric effects Characterization |
| title | Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites |
| title_full | Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites |
| title_fullStr | Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites |
| title_full_unstemmed | Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites |
| title_short | Evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites |
| title_sort | evidence of electronic influence in the adsorption of cationic and zwitterionic dyes on zeolites |
| topic | Adsorption Zwitterionic dyes Freundlich isotherm Electrostatic and geometric effects Characterization |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023072572 |
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