Alüminyum elektrotlar kullanılarak elektrokoagülasyon ile sulu çözeltilerden florür giderimi: İzoterm ve kinetik çalışmaları

Year 2018, Volume: 24 Issue: 6, 1130 - 1134, 18.12.2018

Senem Yazıcı Güvenç , Gamze Varank , Ahmet Demir

Abstract

Bu
çalışmanın ana amacı, alüminyum elektrotlar kullanılarak elektrokoagülasyon
tekniği ile sulu çözeltilerden florürün giderilmesidir. Çalışma koşullarını
optimize etmek için akım yoğunluğu, zaman ve giriş florür konsantrasyonu gibi
çeşitli parametrelerin etkisi üzerine çalışmalar yürütülmüştür. Deneysel
çalışmalar, 11 mA/cm² akım yoğunluğu, 30 dk reaksiyon süresi ve 10
mg/L giriş florür konsantrasyonu koşullarında %87,4 maksimum giderim veriminin
elde edildiğini göstermiştir. Elektrokoagülasyon mekanizması ve prosesin
karakteristik parametreleri isoterm (Langmuir and Freundlich) ve kinetik
modeller (1. ve 2. Derece) ile analiz edilmiştir. Deneysel veriler Langmuir ve
Freundlich izoterm denklemleri ile uyum sağlamıştır. Kinetik çalışma sonuçları,
farklı koşullar altında 2. derece kinetik modelin daha yüksek korelasyon
katsayısı sağladığını göstermiştir.

Keywords

Elektrokoagülasyon, Florür giderimi, İzoterm ve kinetik modeller

Fluoride removal from aqueous solution by electrocoagulation using aluminium electrodes: Isotherm and kinetic studies

Abstract

The
main objective of the present study was the removal of fluoride from aqueous
solution by electrocoagulation technique using aluminum electrodes. The effect
of various parameters such as current density, time and initial fluoride concentration
were studied to optimize the conditions. Experimental study showed that maximum
removal efficiency (87.4%) was achieved at the conditions of current density 11 mA/cm², reaction time 30 min and initial fluoride concentration 10 mg/L. Isotherm models (Langmuir and Freundlich) and kinetic models
(pseudo-first order and pseudo-second order) were used to analyze the
electrocoagulation mechanism and characterize the process parameters.
Experimental data well fitted with Langmuir and Freundlich isotherm equations
and results of the kinetic study indicated that pseudo-second order kinetic
model give higher correlation coefficients for different conditions.

Keywords

Electrocoagulation, Fluoride removal, Isotherm and kinetic models

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