Adsorption of Dyes from Aqueous Solutions Using Apatitic Materials †
by
,
Toma Fistos
1, 
Anda Maria Baroi
1,*,
Sorin Marius Avramescu
2,
Irina Fierascu
1, 
Roxana Ioana Brazdis
1,
Irina Elena Chican
1 and
Radu Claudiu Fierascu
1 1
National Institute for Research & Development in Chemistry and Petrochemistry—ICECHIM Bucharest, 202 Spl. Independentei, 060021 Bucharest, Romania
2
Research Center for Environmental Protection and Waste Management, University of Bucharest, 36-46 Mihail Kogalniceanu Blvd., 050107 Bucharest, Romania
*
Author to whom correspondence should be addressed.
†
Presented at the 15th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM, Bucharest, Romania, 30th October–1st November 2019.
Proceedings 2019, 29(1), 32; https://doi.org/10.3390/proceedings2019029032
Published: 14 October 2019
(This article belongs to the Proceedings of Priorities of Chemistry for a Sustainable Development-PRIOCHEM)
Hydroxyapatite is a calcium phosphate biomaterial that is widely used to treat polluted water, soil, and air, due to its adsorption capacity [1]. Methylene blue (MB) (Figure 1a), a cationic dye, is frequently used in the leather industry for dyeing and printing. This dye is toxic to both humans and animals [2]. Bromothymol blue (BTB) (Figure 1c) is a sulfonphthalein dye, being one of the most widely used indicators to distinguish the acidity, alkalinity, or neutralization of an aqueous solution. Its removal from the environment is important due to the presence of azo groups from the dye component [3]. Congo red (Figure 1b) comes from the textile, printing, dying, paper, and plastic industries. This type of dye is toxic to most organisms, being suspected of carcinogenic and mutagenic effect [4].
The adsorption capacity of three apatitic materials were tested against the described dyes. The adsorption studies were performed by HPLC, while FTIR studies were conducted on the solids after the adsorption experiments.
In conclusion, the tested apatitic materials shown good adsorption capacities for the tested dyes.
Acknowledgments
This work was supported by Romanian Ministry of Research and Innovation -MCI through INCDCP ICECHIM Bucharest 2019-2022 Core Program PN. 19.23 - Chem-Ergent, Project No.19.23.03.01.
References
- Fierascu, I.; Fierascu, R.C.; Popa, O.; Babeanu, N. Synthesized materials for decontamination of heavy metals polluted aqueous solutions. Rom. Biotechnol. Lett. 2014, 19, 9196–9202. [Google Scholar]
- Fierascu, I.; Fierascu, R.C.; Somoghi, R.; Ion, R.M.; Moanta, A.; Avramescu, S.M.; Damian, C.M.; Ditu, L.M. Tuned apatitic materials: synthesis, characterization and potential antimicrobial applications. Appl. Surf. Sci. 2018, 438, 127–135. [Google Scholar] [CrossRef]
- Komur, B.; Ozturk, E.R.; Ekren, N.; Inan, A.T.; Gunduz, O.; Andronescu, E.; Ficai, A.; Oktar, F.N. Characterization of Cu/Ag/Eu/hydroxyapatite composites produced by wet chemical precipitation. Acta Phys. Pol. 2017, 131, 392–396. [Google Scholar] [CrossRef]
- Fierascu, I.; Avramescu, S.M.; Petreanu, I.; Marinoiu, A.; Soare, A.; Nica, A.; Fierascu, R.C. Efficient removal of phenol from aqueous solutions using hydroxyapatite and substituted hydroxyapatites. React. Kin. Mech. Catal. 2017, 122, 155–175. [Google Scholar] [CrossRef]
Figure 1.
Dyes used for the adsorption studies: Methylene blue (a), Congo red (b), and bromothymol blue (c).
Figure 1.
Dyes used for the adsorption studies: Methylene blue (a), Congo red (b), and bromothymol blue (c).
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Share and Cite
MDPI and ACS Style
Fistos, T.; Baroi, A.M.; Avramescu, S.M.; Fierascu, I.; Brazdis, R.I.; Chican, I.E.; Fierascu, R.C. Adsorption of Dyes from Aqueous Solutions Using Apatitic Materials. Proceedings 2019, 29, 32. https://doi.org/10.3390/proceedings2019029032
AMA Style
Fistos T, Baroi AM, Avramescu SM, Fierascu I, Brazdis RI, Chican IE, Fierascu RC. Adsorption of Dyes from Aqueous Solutions Using Apatitic Materials. Proceedings. 2019; 29(1):32. https://doi.org/10.3390/proceedings2019029032
Chicago/Turabian StyleFistos, Toma, Anda Maria Baroi, Sorin Marius Avramescu, Irina Fierascu, Roxana Ioana Brazdis, Irina Elena Chican, and Radu Claudiu Fierascu. 2019. "Adsorption of Dyes from Aqueous Solutions Using Apatitic Materials" Proceedings 29, no. 1: 32. https://doi.org/10.3390/proceedings2019029032
