Comparison of Disperse Blue 79 Dye and Reactive Yellow 160 Dye Removal Efficiency by Electrocoagulation Method

Öz

The textile industry uses high amount of water and generates wastewater that requires effective wastewater treatment technologies. Textile industry in Turkey is an advanced industry particularly in Bursa. During the dying process of fabrics and the fibres a lot of water, synthetic dyes and various chemicals are used, and consequently wastewater is produced that contains complex pollutants with different chemical structure. In particular, dyes that have high water solubility and low fixation rates hydrolyse before they are fully fixed, which results in high amount of waste dye. Decreased light permeability due to the colour caused by the waste dye prevents photosynthetic activities and oxygen depletion occurs. Furthermore, the presence of toxic and mutagenic dyes in water bodies adversely affect aquatic life. Releasing them into the sewage system without treatment can cause problems in biological processes of urban wastewater treatment plants. Therefore, there is a need for innovative, cost effective and efficient wastewater treatment technologies for the treatment of wastewater containing dyes before they are released to the water systems. Electrocoagulation is known to be an effective method especially in colour removal from textile industry wastewaters. In this study, as an effective method for colour removal from waters electrocoagulation was applied to a disperse dye (Disperse Blue 79), which is in a colloid form in a dye solution, and to a reactive dye (Reactive Yellow 160), which has an anionic character and is dissolved in water. After a 10 minutes experiment period with 0.1 A current intensity %92.45 color removal rate was obtained for Disperse Blue 79 whereas for the Reactive yellow 160 color removal rate was only %54.84. Study results shows the importance of dye type in color removal with electrocoagulation method.

Anahtar Kelimeler

• Electrochemical Treatment,dye,electrocoagulation,Reactive Blue 79,Reactive Yellow 160

Elektrokoagülasyon Yöntemi Kullanılarak Disperse Blue 79 ve Reactive Yellow 160 Boyarmaddelerinin Giderim Verimlerinin Karşılaştırılması

Öz

Tekstil endüstrisi yüksek miktarda su ihtiyacı ve atıksu üretimi açısından etkili su arıtım teknolojilerine ihtiyaç duyan bir endüstridir. Türkiye’de özellikle Bursa’da tekstil endüstrisi gelişmiş durumdadır. Tekstil üretiminde kumaşların veya kumaşta kullanılan liflerin boyanması sırasında çok miktarda su, sentetik boya ve çeşitli kimyasallar kullanılır ve bunun sonucunda farklı molekül yapılarında kompleks kirleticileri içeren atıksu meydana gelir. Özellikle suda çözünürlüğü yüksek ve sabitlenme oranları düşük olan boyar maddeler uygulama sırasında tamamen tutunmadan hidrolize olmaları nedeniyle çok miktarda tutunmamış boya atık haline gelir. Alıcı su ortamında atık boyanın oluşturacağı renk nedeniyle ışık geçirgenliği azalarak fotosentez faaliyetleri engellenir ve oksijen tükenmesi meydana gelir. Ayrıca toksik ve mutajenik boyar maddelerin su kütlelerinde bulunmaları sucul yaşamı olumsuz etkiler. Kanalizasyon sistemine arıtılmadan bırakılmaları kentsel atıksu arıtma tesislerinin biyolojik proseslerinde sorunlara yol açabilir. Bu nedenle boyar madde içeren atıksuların su sistemlerine bırakılmadan önce arıtılmaları için yenilikçi, uygun maliyetli ve etkili atıksu artım teknolojilerine ihtiyaç vardır. Elektrokoagülasyon tekstil endüstrisi atıksularında özellikle renk gideriminde etkili bir yöntem olarak bilinmektedir. Bu çalışmada sulardan renk gideriminde etkili bir yöntem olan elektrokoagülasyonun aynı çalışma şartlarında boya banyolarında kolloidal olarak bulunan dispers boyaya (Disperse Blue 79) ve boya banyosunda çözünmüş ve anyonik karakterdeki reaktif boyaya (Reactive Yellow 160) uygulandı. Çalışma sonuçlarından 0,1 Amper akım şiddeti ve 10 dakikalık deney süresi sonunda Disperse Blue 79 boyası % 92.45 oranında giderilirken Reactive Yellow 160 boyası ancak % 54,84 oranında giderildi. Bu sonuç bize elektrokoagülasyon yöntemi ile renk gideriminde boya türünün ne kadar etkili olabildiğini göstermektedir.

Anahtar Kelimeler

• Elektrokimyasal arıtma,boyoarmadde,elektrokoagülasyon,Reactive Blue 79,Reactive Yellow 160

Kaynakça

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