Elektrokimyasal Ayırma Yöntemi ile Sulu Çözeltilerden Bor Giderim Prosesinin Optimizasyonu

Abstract

Canlı yaşamının en temel ihtiyacı su, günümüzde teknolojinin ve endüstri alanlarının gelişmesiyle beraber ciddi oranda kirlenmektedir. Su kaynaklarının kısıtlı olması ve yakın gelecekte dünya nüfusunun su sıkıntısı yaşama olasılığının yüksek olduğu göz önüne alındığında, su kirliliğine sebep olabilen ve ülkemiz için önemli bir mineral olan borun sulardan uzaklaştırılması gerekmektedir. Bu kapsamda bu çalışmada, bor iyonlarının sulu çözeltilerden yenilikçi elektrokimyasal ayırma yöntemi kullanılarak giderilmesi incelenmiştir. Bu amaçla, aktif karbon ile kaplanarak hazırlanmış elektrotlar ve elektrokimyasal akış hücresi kullanılmıştır. Sürekli akış koşullarında bor adsorpsiyon verimini etkileyen akış hızı, hücreye uygulanan potansiyel ve bor konsantrasyonu parametrelerinin optimizasyonu Box-Behnken deney tasarımı yöntemi kullanılarak gerçekleştirilmiştir. 1-5 ml/dak akış hızı, 0,5-1,5 V potansiyel ve 10-90 ppm bor konsantrasyonu aralıklarında bor iyonlarının adsorpsiyon deneyleri yapılmıştır. Deney tasarımı sonuçlarına göre, çalışılan üç parametre arasından akış hızının bor giderimini etkileyen en önemli parametre olduğu belirlenmiştir. Bor adsorpsiyon veriminin en yüksek olduğu (%94,1) optimum koşullar 1 ml/dak akış hızı, 0,5 V potansiyel ve 50 ppm bor konsantrasyonu olarak tespit edilmiştir. Ayrıca, optimum koşullarda çalışılan elektrotların yüzey morfolojileri taramalı elektron mikroskobu kullanılarak karakterize edilmiştir.

Keywords

• Bor giderimi
• Optimizasyon
• Deney tasarımı
• Elektrokimyasal ayırma yöntemi.

Optimization of Boron Removal Process from Aqueous Solutions by Electrochemical Separation Method

Abstract

Water, the most basic need of both humans and ecosystems, is being seriously polluted today with the development of technology and industry. Considering that water resources are limited and the probability of the world population experiencing water shortage soon is high, boron, which can cause water pollution and is an important mineral for our country, needs to be removed from the water. In this study, the removal of boron ions from aqueous solutions using an innovative electrochemical separation method was investigated. For this purpose, electrodes prepared by coating with activated carbon and electrochemical flow cell were used. Optimization of flow rate, potential applied to the cell and boron concentration parameters affecting boron adsorption efficiency under continuous flow conditions was carried out using the Box-Behnken experimental design method. Adsorption experiments of boron ions were carried out in the ranges of 1-5 ml/min flow rate, 0.5-1.5 V potential and 10-90 ppm boron concentration. According to the experimental design results, it was determined that flow rate was the most important parameter affecting boron removal among the three parameters studied. The optimum conditions with the highest boron adsorption efficiency (94.1%) were determined to be 1 ml/min flow rate, 0.5 V potential and 50 ppm boron concentration. Surface morphologies of the electrodes studied under optimum conditions were characterized using a scanning electron microscope.

Keywords

• Boron removal
• Optimization
• Experimental design
• Electrochemical separation method.

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