Nano-silica from kaolinitic clay used as adsorbent for anionic and cationic dyes removal: linear and non-linear regression isotherms and kinetics studies
Gustave Tchanang, Chantale Njiomou Djangang*, Charles Fon Abi, Danie Laure Mbella Moukouri, Guillonnel Trésor Nyadjou Djabo, Jean Marie Kepdieu and Philippe Blanchart
The increasing occurrence of wastewaters associated with industrial development has begotten a permanent search for new and more efficient techniques for the removal of hazardous substances such as heavy metals and dyes. The use of natural and available resources to develop improved and sustainable commodities for this purpose remains crucial and is among promising emerging green technologies for water treatment. It offers the gradual shifting of hazardous industrial chemicals precursors to the abundant non-metallic mineral resources that receive an added value. This work investigated the uptake capacity by the adsorption process of methylene blue (MB) and azocarmine G (AG) onto nano-silica synthesized from kaolinite clay. The effects of contact time (0-30 min), the adsorbent dosage (5-100 mg), the initial pH of the solution (1-11 for MB and 1-7 for AG), and the initial dye concentration (5-50 mg/L) were studied. The selected conditions to carry out kinetic and isotherm adsorption experiments were: 15 mins, 20 mg, 11 for MB, 1.01 for AG, and 50 mg/L. Four adsorption isotherms and three kinetic models were used to model the adsorption data thanks to linear and non-linear regression methods. From the obtained results, the Freundlich isotherm model fitted well the adsorption phenomenon while the pseudo-second-order kinetic model described well the adsorption mechanism. Furthermore, the free energy of adsorption was similar for the two absorbents, 0.71 kJ, pointing physisorption as the dominant adsorption mechanism. The optimum MB and AG uptake were respectively 13.8 and 36.1 mg/g. Conclusively, the nano-silica represents a potentially viable and powerful adsorbent whose use could lead to a plausible improvement in environmental preservation.
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My candid opinion is that the service you render is second to none. My favourite part is the prompt response to issue, really i value that.
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I, Muhammad Sarwar Khan, am serving as Editor on Archives of Biotechnology and Biomedicine (ABB). I submitted an editorial titled, 'Edible vaccines to combat Infectious Bursal Disease of poultry' for publication in ABB. After submitting the manuscript; the services rendered by the management and technical personnel to handle and process the manuscript were marvelous. Plagiarism report was shared with me with complements before reviewers' comments, All steps including article processing and service charges were well taken care of keeping in view the author's interest/preference. All together, it was an encouraging and wonderful experience working with ABB personnel.
University of Agriculture, Pakistan
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University of Jacqmar, Inc., USA
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College of Fisheries, CAU(I), Tripura, India
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Assaf Harofeh Medical Center, Israel
Leonid Feldman
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University of Tubingen, Germany
Yvonne Mast
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Eastern Mediterranean University, Cyprus
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University of Port Harcourt Teaching Hospital, Nigeria
Dr. Elizabeth A Awoyesuku
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NC A&T State University, USA
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Ayokunle Dada
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Ido-Ekiti/Afe Babalola University, Nigeria
Dr. Shuaib Kayode Aremu
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Ekiti State University, Nigeria
Adebukola Ajite
I wanna to thank clinical journal of nursing care and practice for its effort to review and publish my manuscript. This is reputable journal. Thank you!
Wollo University, Ethiopia
Atsedemariam Andualem
We appreciate your approach to scholars and will encourage you to collaborate with your organization, which includes interesting and different medical journals.
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Department of Biotechnology, Uttaranchal college of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
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Long Ching
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Palestine College of Nursing, Khan Younis, Gaza Strip, Palestine
Ayman M Abu Mustafa
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Department of Agricultural Economics, Agribusiness and Extension, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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