Removal of a Textile Dye from Aqueous Phase Using CaO2 as an Environmentally Friendly Oxidant

Öz

The presence of wastewater containing textile dyes in receiving environments poses significant risks to environmental health. Advanced oxidation processes are among the methods that effectively remove dye substances. Although Fenton processes are commonly used, they present a significant disadvantage due to the generation of large amounts of sludge containing metals. CaO2 is a chemical with an environmentally friendly and strong oxidation potential. In this study, the oxidation of Crystal Violet dye in aqueous phase using CaO2 under varying experimental conditions was investigated. CaO2 exhibited high oxidation efficiencies without the need for activators like iron. The process successfully prevented sludge formation at the end. The optimum pH value for the oxidation of CV was found to be 10. The oxidation studies indicated that high oxidation efficiencies could be achieved with low doses of CaO2 and short reaction times. It was determined that a reaction time of 25 minutes with 0.1 grams of CaO2 was sufficient for the removal of 99.9% of 200 mg/L CV.

Anahtar Kelimeler

• Advance oxidation
• Dye
• Wastewater
• Calcium peroxide

Bir Tekstil Boyasının Çevre Dostu Bir Oksidant Olan CaO2 ile Sulu Fazdan Giderimi

Öz

Tekstil boyar maddelerini içeren atıksuların alıcı ortamlarda varlığı, çevre sağlığı için önemli sakıncalar oluşturmaktadır. Boyar maddelerin etkili bir şekilde giderimini sağlayan yöntemler arasında ileri oksidasyon prosesleri yer almaktadır. Yaygın kullanılan yöntemler arasında Fenton prosesleri bulunsa da, bu yöntem metal içerikli çok miktarda çamur oluşturması nedeniyle önemli bir dezavantaj teşkil etmektedir. CaO2, çevre dostu ve güçlü oksidasyon potansiyeline sahip bir kimyasaldır. Bu çalışmada, değişken deneysel koşullar altında CaO2 ile Crystal Violet boyar maddesinin sulu fazda oksidasyonu araştırılmıştır. CaO2, demir gibi aktivatör olmadan yüksek oksidasyon verimleri göstermiştir. Süreç sonunda çamur oluşumunun önüne geçilmiştir. CV oksidasyonu için optimum pH değerinin 10 olduğu tespit edilmiştir. Oksidasyon çalışmaları, düşük CaO2 dozlarıyla kısa reaksiyon sürelerinde yüksek oksidasyon verimlerinin elde edilebileceğini ortaya koymuştur. 200 mg/L CV'nin %99,9 oranında giderimi için 0,1 gram CaO2 kullanılarak 25 dakikalık bir reaksiyon süresinin yeterli olduğu belirlenmiştir.

Anahtar Kelimeler

• İleri oksidasyon
• Boyar madde
• Atık su
• Kalsiyum peroksit

Kaynakça

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