Hidroklorik ve Asetik Asit Modifikasyonunun Doğal Zeolitlerin HTAB ve K+ Adsorpsiyon Karakteristikleri Üzerindeki Etkileri

Öz

Bu çalışmada hidroklorik (HCl) ve asetik asit (HAc) modifikasyonunun doğal zeolitlerin HTAB ve K+ adsorpsiyon karakteristikleri üzerindeki etkileri araştırılmıştır. Yapılan elektrokinetik değerlendirmeler HCl’in zeta potansiyeli üzerinde HAc’e kıyasla daha öne çıkan bir etkiye sahip olduğunu göstermiştir. Buna ek olarak, asitle modfiye edilmiş örneklerin pH ayarlama davranışının zeta potansiyeli ölçümü sonuçları ile uyumlu bir şekilde doğal zeolit örneklerinden farklı olduğu bulunmuştur. Asit modifikasyon işlemleri doğal zeolitlerin yüzey özelliklerini ve katyon değişim kapasitelerini açıkça olumlu olarak etkilemiştir. Adsorpsiyon çalışmalarının sonuçları zeolitin adsorpsiyon yoğunluğunun yüksek HTAB ve K+ konsantrasyonlarında arttığını göstermiştir. Ayrıca, zeta ve pH profili sonuçlarını takiben HTAB ve K+ adsorpsiyonu açısından doğal ve asitle modifiye edilmiş örnekler arasında adsorpsiyon yeteneği açısından kayda değer bir farklılık bulunduğu belirlenmiştir. Asit modifikasyonunun doğal zeolitlerin adsorpsiyon yeteneğinin geliştirilmesinde kullanılabileceği sonucuna varılmıştır.

Anahtar Kelimeler

• Zeolit
• Asit Modifikasyonu
• Adsorpsiyon
• HTAB
• Potasyum

Proje Numarası

FBA-2017-25729

Effects of Hydrochloric and Acetic Acid Modification on the HTAB and K+ Adsorption Characteristics of Natural Zeolites

Öz

In this study, the effects of hydrochloric acid (HCl) and acetic acid (HAc) modification on the hexadecyl trimethyl ammonium bromide (HTAB) and K+ adsorption characteristics of a natural zeolite were investigated. Electrokinetic evaluations showed that HCl had a more prominent effect on zeta potential compared to HAc. Additionally, the pH regulation behavior of the acid-modified samples was found to differ from the natural zeolite sample and it was in agreement with the results of zeta potential measurements. It was clear that the acid modification processes positively affected the surface properties and improved the cation exchange capacity (CEC) of natural zeolite. The results for the adsorption studies showed that the adsorption density of zeolite increased at elevated HTAB and K+ concentrations. Moreover, following the zeta and pH profile results, a considerable difference in the adsorption ability between natural and acid-modified zeolite samples is present in terms of HTAB and K+ adsorption characteristics. It was concluded that acid modification can be used in the enhancement of the adsorption ability of zeolites.

Anahtar Kelimeler

• Zeolite
• Acid Modification
• Adsorption
• HTAB
• Potassium

Destekleyen Kurum

Scientific Research Projects Coordination Unit of Istanbul University-Cerrahpasa

Proje Numarası

FBA-2017-25729

Teşekkür

This work was supported by Scientific Research Projects Coordination Unit of Istanbul University-Cerrahpasa, Project number FBA-2017-25729.

Kaynakça

1. [1] Weitkamp, J. 2000. Zeolites and catalysis, Solid State Ionics, Vol. 131, pp. 175-188. DOI: 10.1016/S0167-2738(00)00632-9
2. [2] Tao, Y., Kanoh, H., Abrams, L., Kaneko, K. 2006. Mesopore-modified zeolites: preparation, characterization, and applications, Chemical Reviews, Vol. 106, pp. 896-910. DOI: 10.1021/cr040204o
3. [3] Strohmaier, K. G., Vaughan, D. E. 2003. Structure of the first silicate molecular sieve with 18-ring pore openings, ECR-34, Journal of the American Chemical Society, Vol. 125, pp. 16035-16039. DOI: 10.1021/ja0371653
4. [4] Mastinu, A., Kumar, A., Maccarinelli, G., Bonini, S. A., Premoli, M., Aria, F., Gianoncelli, A., Memo, M. 2019. Zeolite clinoptilolite: Therapeutic virtues of an ancient mineral, Molecules, Vol. 24, pp. 1517. DOI: 10.3390/molecules24081517
5. [5] Saltalı, K., Sarı, A., Aydın, M. 2007. Removal of ammonium ion from aqueous solution by natural Turkish (Yıldızeli) zeolite for environmental quality, Journal of Hazardous Materials, 141, pp. 258-263. DOI: 10.1016/j.jhazmat.2006.06.124
6. [6] Jha, B., Singh, D.N. 2011. A review on synthesis, characterization and industrial application of fly ash zeolites, Journal of Materials Education, Vol. 33, pp. 65–132.
7. [7] Wang, S., Peng, Y. 2010. Natural zeolites as effective adsorbents in water and wastewater treatment, Chemical Engineering Journal, Vol. 156, pp. 11-24. DOI: 10.1016/j.cej.2009.10.029
8. [8] Król, M. 2020. Natural vs. synthetic zeolites, Crystals, Vol. 10, pp. 622. DOI: 10.3390/cryst10070622

9. [9] Ersoy, B., 2000. Investigating of the adsorption mechanisms of various cationic surface active agents onto clinoptilolite (natural zeolite) and capture of the non-ionic organic contaminants in liquids by modified clinoptilolite. ITU Graduate School of Science Engineering and Technology, Ph.D. Dissertation, 232p, Istanbul.
10. [10] Flanigen, E. M. 1991. Zeolites and molecular sieves a historical perspective, Studies in Surface Science and Catalysis, Vol. 58, pp. 13-34. DOI: 10.1016/S0167-2991(08)63599-5
11. [11] Mumpton, F.A, Ormsby, W.C. 2001. Morphology of zeolites in the sedimentary rocks by scanning electron microscopy, Clays and Clay Minerals, Vol. 24, pp. 5-25. DOI: 10.1346/CCMN.1976.0240101
12. [12] Margeta, K., Logar, N. Z., Šiljeg, M., Farkaš, A. 2013. Natural zeolites in water treatment–how effective is their use, Water Treatment, Vol. 5, pp. 81-112. DOI: 10.5772/50738
13. [13] Chen, C. Y., Zones, S. I. 2007. Characterization of zeolites via vapor phase physisorption of hydrocarbons, Microporous and Mesoporous Materials, Vol. 104, pp. 39-45. DOI: 10.1016/j.micromeso.2006.12.045
14. [14] Mortier, W.J. 1978. Zeolite electronegativity related to physicochemical properties, Journal of Catalysis, Vol. 55, pp. 138–145. DOI: 10.1016/0021-9517(78)90200-2
15. [15] Beving, D.E., O’Neill, C.R., Yan, Y. 2008. Hydrophilic and anti-microbial low silica zeolite LTL and high silica zeolite MFI hybrid coatings on aluminium alloys, Microporous and Mesoporous Materials, Vol. 108, pp. 77–85. DOI: 10.1016/j.micromeso.2007.03.029
16. [16] Türkman, A., Aslan, Ş., Ege, İ. 2001. Lead Removal from Wastewaters by Natural Zeolites, DEU Journal of Science and Engineering, Vol. 3, pp. 13-19.
17. [17] Gläser, R. 2007. Novel process options for application of zeolites in supercritical fluids and ionic liquids, Chemical Engineering & Technology: Industrial Chemistry‐Plant Equipment‐Process Engineering‐Biotechnology, Vol. 30, pp. 557-568. DOI: 10.1002/ceat.200700004
18. [18] Macedo-Miranda, M. G., Olguin, M. T. 2007. Arsenic sorption by modified clinoptilolite–heulandite rich tuffs, Journal of Inclusion Phenomena and Macrocyclic Chemistry, Vol. 59, pp. 131-142. DOI: 10.1007/s10847-007-9306-3
19. [19] Samsunlu, A., 1999. Çevre Mühendisliği Kimyası. Sam Çevre Teknolojileri Merkezi Yayınları, Istanbul, 177 p.
20. [20] Bilgin, O, 2009. Investigation of the raw material properties of Gördes zeolite ores and searching their useability in different sectors. Dokuz Eylul University The Graduate School of Natural And Applied Sciences, Ph.D. Dissertation, 194p, Izmir.
21. [21] Grant, D.C., Skribi, M. C., Saha, A.K. 1987. Removal of radioactive contaminants from west valley waste streams using natural zeolites, Environmental Progress, Vol. 6, pp. 104-109. DOI: 10.1002/ep.670060212
22. [22] Gördes Zeolite 2021. Technical Data Sheet. https://zeoproducts.com/assets/catalogues/tech_data_sheet/en/clinoptilolite.pdf (Erişim Tarihi: 12.04.2021).
23. [23] Ozdemir, O., Armagan, B., Turan, M. and Celik, M.S. 2004. Comparison of the adsorption characteristics of azo-reactive dyes on mesoporous minerals, Dyes and Pigments, Vol. 62, pp. 49-60. DOI: j.dyepig.2003.11.007
24. [24] Barola, C. E. C., Dusaban, I. F. C., Olegario-Sanchez, E. M., Mendoza, H. D. 2019. The effect on the zeta potential of surface modified Philippine natural zeolites (SM-PNZ) for the adsorption of anionic solutions. The 2nd Mineral Processing and Technology International Conference, 1 November 2018, Tangerang, Banten Province, Indonesia.
25. [25] Baes, C.F. Mesmer, R.E. 1976. The hydrolysis of cations. Wiley, New York, 489p.
26. [26] Ersoy, B. Çelik, M.S. 2002. Electrokinetic properties of clinoptilolite with mono and multivalent electrolytes, Microporous and Mesoporous Materials, Vol. 55, pp. 305-312. DOI: 10.1016/S1387-1811(02)00433-X
27. [27] Liu, J., Cheng, X., Zhang, Y., Wang, X., Zou, Q., Fu, L. 2017. Zeolite modification for adsorptive removal of nitrite from aqueous solutions, Microporous and Mesoporous Materials, Vol. 252, pp. 179-187. DOI: j.micromeso.2017.06.029