Treatment by Electrocoagulation of Congo red from Aqueous Solution Using Cantor Alloy

Year 2021, Issue: 32, 791 - 796, 31.12.2021

Gulizar Kurtoglu Akkaya , Gökhan Polat

https://doi.org/10.31590/ejosat.1041536

Abstract

Electrocoagulation (EC) is one of the most effective techniques in removing color and organic pollutants from wastewater. This study aims to use a new alloy system, so-called High Entropy Alloys (HEAs), which contains at least five principal elements with 5-35 at. %, as an electrode in the EC process. The well-studied equiatomic CrMnFeCoNi HEA (Cantor alloy) was used as an anode in the treatment of the synthetically prepared wastewater (congo red solution) with EC. In the EC study, COD and color removal were evaluated at different current densities (5-100 mA/cm2) for 15 min electrolysis period. The results showed that removal efficiency of above 80 % was obtained for both parameters of COD and color at the lowest current density of 5 mA/cm2. The optimum current density was determined to be 10 mA/cm2, and the COD and color removal efficiencies were found to be 84 and 99.4 %, respectively. It was shown that the Cantor alloy possesses an effective removal in the EC process.

Keywords

Electrocoagulation, congo red, high entropy alloy, cantor alloy, COD removal.

Thanks

The authors would like to thank the Department of Metallurgical and Materials Engineering, Middle East Technical University, for the production of high entropy alloys.

Cantor Alaşımı Kullanılarak sulu çözeltiden Kongo Kırmızısının Elektrokoagülasyon ile Arıtımı

Abstract

Elektrokoagülasyon (EC) atıksudan renk ve organik kirleticileri uzaklaştırmak için en etkili tekniklerden biridir. Bu çalışmada, en az beş temel element ve herbir element için % at. 5-35 içeren Yüksek Entropi Alaşımları (HEA) olarak adlandırılan yeni bir alaşım sisteminin EC prosesinde elektrot olarak kullanılması hedeflenmiştir. Yoğun şekilde çalışılan eşit atomlu CrMnFeCoNi HEA (Cantor alaşımı), sentetik olarak hazırlanmış congo red çözeltisinin EC ile arıtılmasında anot olarak kullanılmıştır. Yapılan EC çalışması 15 dakika elektroliz süresinde farklı akım yoğunluklarında (5-100 mA/cm2) KOİ ve renk giderimi değerlendirilmiştir. Deney sonucunda, akım yoğunluğu 5 mA/cm2, her iki renk ve KOİ parametrede % 80 üzeri arıtım verimi elde edilmiştir. Optimum akım yoğunluğu ise 10 mA/cm2 olarak belirlenmiş, KOİ ve renk giderim verimi sırasıyla % 84 ve 99,4 olarak bulunmuştur. Yapılan bu çalışma neticesinde, kullanılan Cantor alaşımının EC procesinde giderimde etkili olduğu gösterilmiştir.

Keywords

Elektrokoagülasyon, kongo kırmızısı, yüksek entropi alaşımı, cantor alaşımı, KOİ giderimi.

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