Removal of acid red-20 synthetic industrial dyestuff from aqueous solution by electro oxidation method

Abstract

In this study, the process of removing Acid Red 20 synthetic industrial light azo dyestuff from water by electro-oxidation was studied. Titanium was used as the anode and steel was used as the cathode. 100 mg / L constant dye concentration and as a result of preliminary tests, the optimum current density was 033 A / m2. The type of salt used on the purification process (NaCl, NaCO3, Na2NO3 and KC), salt concentration (0.025 M, 0.050 M, 0.075 M and 0.1 M), environment pH (natural, 3, 5, 7, 9 and 11) and the effect of stirring speed (0, 150 rpm, 300 rpm and 450 rpm) was investigated. As a result, it was determined that the most suitable salt for the process was KCI. Considering that energy is the most important expense in treatment processes, the optimum salt concentration was determined as 0.075 M KCI. It was observed that the color removal and COD removal efficiency increased with increasing mixing speed. Achieved an important value of 99.5% for removal efficiency of Acid Red 20 from the aqueous solution. The results obtained showed that the electro-oxidation method can be used to remove light azo dyes from water.

Keywords

• Electro-oxidation
• Acid red 20
• Ddyestuff
• Color removal

Acid red-20 sentetik endüstriyel boyar maddenin elektro-oksidasyon yöntemi ile sulu çözeltiden uzaklaştırılması

Öz

Bu çalışmada Acid Red 20 sentetik endüstriyel hafif azoboyar maddenin elektro-oksidasyon ile sudan uzaklaştırılması prosesi çalışılmıştır. Anot olarak Titanyum katot olarak ise çelik kullanılmıtır.100 mg/L sabit boya konsantrasyonunda ve ön denemeler sonucunda en uygun akım yoğunluğu olan 033 A/m2 de çalışıldı. Arıtma prosesi üzerinde kullanılan tuz türünün (NaCI, NaCO3, Na2NO3 ve KC), tuz konsantrasyonunun (0.025 M, 0.050 M, 0.075 M ve 0.1 M), ortam pH’ sının (doğal, 3, 5, 7, 9 ve11) ve karıştırma hızının (0, 150 rpm, 300 rpm ve 450 rpm) etkisi incelendi. Sonuç olarak proses için en uygun tuzun KCI olduğu belirlendi. Arıtım proseslerinde de en önemli giderin enerji olduğu göz önünde bulundurularak en uygun tuz konsantrasyonu 0.075 M KCI olarak belirlendi. Renk giderimi ve KOİ giderim veriminin karıştırma hızının artışıyla arttığı görüldü Sulu çözeltiden Acid Red 20 giderim verimi için %99.5 gibi önemli değere ulaşıldı. Elde edilen sonuçlar elektro-oksidasyon yönteminin hafif azoboyaların sulardan giderilmesinde kullanılabilir bir yöntem olduğunu göstermiştir.

Anahtar Kelimeler

• Elektro-oksidasyon
• Acid Red 20
• Boyar Madde
• Renk Giderimi

Kaynakça

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