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

Abstract

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.

Keywords

• Zeolit
• Asit Modifikasyonu
• Adsorpsiyon
• HTAB
• Potasyum

Project Number

FBA-2017-25729

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

Abstract

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.

Keywords

• Zeolite
• Acid Modification
• Adsorption
• HTAB
• Potassium

Supporting Institution

Scientific Research Projects Coordination Unit of Istanbul University-Cerrahpasa

Project Number

FBA-2017-25729

Thanks

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

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