ADSORPTION OF MERCURIC ION FROM AQUEOUS SOLUTIONS USING MODIFIED FLY ASH
Keywords:(3-Mercaptopropyl) triethoxysilane, fly ash, mercuric ion absorption, adsorption isotherm models
AbstractIn this study, fly ash was treated with NaOH solution (FAN) before modifying with (3-mercaptopropyl) triethoxysilane - MPTMS (FAMPS). By using FTIR, FESEM, XRD, EDX, and BET techniques, the change in structure, composition and morphology of FAN and FAMPS was evaluated. The FTIR spectra of FAN and FAMPS showed that there is no chemical reaction between the MPTMS and FAN. After modification, the FAMPS has a rough surface with composition difference from the FAN. Mercuric ion adsorption behavior as well as adsorptionisotherm models (Langmuir and Freundlich) of the FAN and FAMPS were also investigated and discussed. Thanks to FAN modification, the mercuric ion removal percent of the FAMPS was higher than that of the FAN. Owing to the adsorption data, Freundlich isotherm modelwas fitted for the mercuric ion adsorption process.
Ghosal S., Self S. A. - Particle size-density relation and cenosphere content of coal fly ash, Fuel 74(4) (1995) 522-529.
Shaobin W., Hongwei W. - Environmental – benign utilisation of fly as low –cost adsorbents, Journal of Hazardous Materials B136 (2006) 482 – 501.
Agarwal S., Rani A. - Adsorption of resorcinol from aqueous solution onto CTAB/NaOH/flyash composites: Equilibrium, kinetics and thermodynamics, Journal of Environmental Chemical Engineering 5 (2017) 526–538.
Chatterjee D., Patnam V. R., Sikdar A., and Moulik S. K. - Removal of some common textile dyes from aqueous solution using fly ash, J. Chem. Eng. Data 55(12) (2010) 5653–5657.
Sharan R., Singh G., Gupta S. K. - Adsorption of phenol from aqueous solution onto fly ash from a thermal power plant, Adsorption Science & Technology 27(3) (2009) 267-279.
Halas P., Kolodynska D., Plaza A., Geca M., Hubicki Z. - Modified fly ash and zeolites as an effective adsorbent for metal ions from aqueous solution, Adsorption Science & Technology 35(5-6) (2017) 519–533.
Ji X. D., Ma Y. Y., Peng S. H., Gong Y. Y., Zhang F. - Simultaneous removal of aqueous Zn2+, Cu2+, Cd2+, and Pb2+ by zeolites synthesized from low-calcium and high-calcium fly ash, Water Science & Technology 76(7-8) (2017) 2106-2119.
Pehlivan E., Cetin S. - Application of fly ash and activated carbon in the removal of Cu2+ and Ni2+ ions from aqueous solutions, Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 30 (2008) 1153-1165.
Sasithorn J., Wiwattanadate D. and Sangsuk S. - Utilization of fly ash from power plant for adsorption of hydrocarbon contamination in water, Journal of Metals, Materials and Minerals 20(1) (2010) 5-10.
Singh D. - Studies of the adsorption thermodynamics of oxamyl on fly ash, Adsorption Science & Technology 18(8) (2000) 741-748.
Visa M., Duta A. - Methyl-orange and cadmium simultaneous removal using fly ash and photo-Fenton systems, J. Hazard. Mater. 244 (2013) 773–779.
Visa M., Isac L., Duta A. - Fly ash adsorbents for multi-cation wastewater treatment, Applied Surface Science 258 (2012) 6345– 6352.
Gupta R. K., Singh R. A., Dubey S. S. - Removal of mercury ions from aqueous solutions by composite of polyaniline with polystyrene, Separation and Purification Technology 38(3) (2004) 225-232.
Chinh N. T., Mai T. T., Trang N. T. T., Huong N. T. T., Hoang T. - Using fly ash treated by NaOH and H2SO4 solutions for Hg2+ and Cd2+ ion adsorption, Journal of Chemistry 55(2) (2017) 196-201.
Özlem Ç., Damci E., Pişkin S. - Characterization of fly ash and its effects on the compressive strength properties of Portland cement, Indian Journal of Engineering and Materials Sciences 15(5) (2008) 433-440.
Hoang T., Chinh N. T., Khu L. V., Trang N. T. T. - Study on the modification of nanosilica with 3-aminopropyltriethoxy silane, Journal of Chemistry 51(1) (2013) 45-49.
Authors who publish with Vietnam Journal of Science and Technology agree with the following terms:
- The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
- The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).