TEKSTİL ATIKSUYU VE SENTETİK BOYARMADDE ÇÖZELTİLERİNDEN RENK VE KOİ GİDERİMİNDE ALÜM VE MAGNEZYUM KLORÜRÜN KARŞILAŞTIRILMASI

Bu çalışmada Adana ilinde faaliyet gösteren iki farklı tekstil endüstrisi atıksuyu ve Basic Blue 41, Basic Blue 3, Vat Green 1, Vat Blue 4, Direct Blue 71 ve Reactive Blue 29 boyarmaddelerini içeren sentetik olarak hazırlanmış çözeltilerde magnezyum flokülasyonunu çalışılarak geleneksel bir koagülant olan alüm ile karşılaştırılmıştır. Her iki koagülant için optimum doz çalışılmış olup magnezyum flokülasyonunda pH’ın etkisi araştırılmıştır. Magnezyum flokülasyonunda 11,5 pH değerinde daha etkili sonuç alındığı gözlenmiştir. Renk ve KOİ gideriminde ise magnezyum flokülasyonunun alümden daha etkili olduğu tespit edilmiştir. Ayrıca deneysel çalışma verileri Freundlich, Langmuir, Temkin ve Dubinin-Radushkevich adsorpsiyon izoterme modeline adsorpsiyon uyumunu tespit etmek için uygulanmış ve model sabitleri hesaplanmıştır. Modelleme çalışması sonucunda Renk ve KOİ gideriminde adsorpsiyonun da önemli etkisinin olduğu tespit edilmiştir.

Anahtar Kelimeler:

koagülasyon, flokülasyon, adsorpsiyon, magnezyum, renk

COMPARISON OF ALUM AND MAGNESIUM CHLORIDE IN COLOR AND COD REMOVAL FROM TEXTILE INDUSTRY WASTEWATER AND SYNTHETIC DYEING SOLUTIONS

In this study, magnesium flocculation of textile industry effluents from two factories and synthetic dyes solutions containing Basic Blue 41 (BB41), Basic Blue 3 (BB3), Vat Green 1 (VG1), Vat Blue 4 (VB4), Direct Blue 71 (DB71), and Reactive Blue 29 (RB29) have been studied and the results were compared with alum as conventional coagulant. The effects of pH on magnesium flocculation and optimum dosages for each coagulants have also been investigated. The results showed that pH 11,5 was the most efficient for magnesium flocculation. The color and COD removal efficiencies of magnesium flocculation were found better than those of alum. The data from experimental studies were also applied to Freundlich, Langmuir, Temkin, and Dubinin-Radushkevich adsorption isotherm models and related constants of each model were also calculated in order to determine the effect of adsorption. It was found out that the adsorption played an important role during whole coagulation process for the removal of color and COD

Keywords:

coagulation, flocculation, adsorption, magnesium, color,

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