Asitli maden drenajlarının (AMD) fenton prosesiyle arıtımı
Yükleniyor...
Dosyalar
Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Selçuk Üniversitesi Fen Bilimleri Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Asitli maden drenajları (AMD), madencilik faaliyetleri sırasında oluşan atıksulardır. AMD yüksek kirletici konsantrasyonlarına ve düşük pH'a sahiptir. AMD toksik etkisinden dolayı çevre ve insan sağlığına ciddi zararlar vermektedir. Bu sebeple alıcı ortama deşarj edilmeden önce mutlaka arıtılmalıdır. Bir kimyasal oksidasyon yöntemi olan Fenton prosesinde, en güçlü oksidanlardan biri olan hidroksil radikali ( OHâ ¢ ) asidik pH şartlarında, katalizör olarak demir (Fe2+) iyonları varlığında gerçekleşen kimyasal reaksiyonlar ile üretilmektedir. Bu proses oksidasyon ve koagülasyon-flokülasyon işlemlerini bir arada içermektedir. AMD, hem asidik özellikte olduğundan hem de Fe2+ iyonlarını içerdiğinden, Fenton prosesi avantajlı ve ekonomik bir yöntem haline gelmektedir. Çalışma optimizasyon, kinetik ve çamur özellikleri belirlenmesi aşamalarından oluşmuştur. Çökelme süresi olarak 2 saatin yeterli olduğu kabul edilmiştir. En başarılı Fe2+/H2O2 molar oranının ise 1,8 olduğu görülmüştür. Bu şartlar altında AMD'ndaki KOİ %99 civarında giderilmiştir. Ayrıca ağır metal, bulanıklık ve renk değerlerinde de %99'lara varan oldukça yüksek giderim verimleri elde edilmiştir. Çamur özelliklerinin belirlenmesi çalışmasında da 1,8 molar oranı en başarılı verimi sağlayan doz olarak belirlenmiştir. Kinetik çalışmada KOİ, renk ve bulanıklık parametrelerinin reaksiyon hızları belirlenmiştir. Her üç parametre için reaksiyon derecesinin 1 ve/veya 2 olduğu görülmüştür.
Acid-mine drainages (AMD) are wastewater which contain sulfuric acid, dissolved iron and heavy metals exist. AMD include high pollution matter and low pH. They are potential pollutants for surface and groundwaters, despite the dilution after discharge to these water bodies. Discharging AMD without any pre-treatment causes environmentally significant dangers. In Fenton oxidation process, which is one of the chemical oxidation methods, hydroxyl radical ( OHâ ¢ ), one of the most powerful oxidants, is produced under low pH in the presence of ferrous ion (Fe2+) as catalyst. This method is also combination of oxidation and coagulation-flocculation. Fenton process seems advantageous for the treatment of AMD because of Fe2+ content and low pH of AMD. The goal of this investigation is to be determined the performance of Fenton process which is an oxidation method and treatment of belongs to a copper mine. This study has three levels. First of all, the time of precipitation and the optimization of chemical dose were performed. Then system kinetics was searched at optimum condition and reaction degrees were determined. Finally the feature of Fenton sludge which exist in the using of Fenton oxidation was analized. In the optimization study, optimum precipitation time was 2 hours and it was seen that optimum Fe2+/H2O2 molar ratio was 1,8. Under these conditions high COD at AMD is decreased approximately 99%. In addition %99 removal at heavy metals, turbidity and colour values was obtained. At kinetic study, the reaction speed of COD, colour and turbidity parameters were determined. For each 3 parameters it was seen that reaction degree is 1 and/or 2.
Acid-mine drainages (AMD) are wastewater which contain sulfuric acid, dissolved iron and heavy metals exist. AMD include high pollution matter and low pH. They are potential pollutants for surface and groundwaters, despite the dilution after discharge to these water bodies. Discharging AMD without any pre-treatment causes environmentally significant dangers. In Fenton oxidation process, which is one of the chemical oxidation methods, hydroxyl radical ( OHâ ¢ ), one of the most powerful oxidants, is produced under low pH in the presence of ferrous ion (Fe2+) as catalyst. This method is also combination of oxidation and coagulation-flocculation. Fenton process seems advantageous for the treatment of AMD because of Fe2+ content and low pH of AMD. The goal of this investigation is to be determined the performance of Fenton process which is an oxidation method and treatment of belongs to a copper mine. This study has three levels. First of all, the time of precipitation and the optimization of chemical dose were performed. Then system kinetics was searched at optimum condition and reaction degrees were determined. Finally the feature of Fenton sludge which exist in the using of Fenton oxidation was analized. In the optimization study, optimum precipitation time was 2 hours and it was seen that optimum Fe2+/H2O2 molar ratio was 1,8. Under these conditions high COD at AMD is decreased approximately 99%. In addition %99 removal at heavy metals, turbidity and colour values was obtained. At kinetic study, the reaction speed of COD, colour and turbidity parameters were determined. For each 3 parameters it was seen that reaction degree is 1 and/or 2.
Açıklama
Anahtar Kelimeler
Asitli maden drenajları, Fenton, Oksidasyon, Acid mine drainages, Oxidation
Kaynak
WoS Q Değeri
Scopus Q Değeri
Cilt
Sayı
Künye
Mahiroğlu, A. (2006). Asitli maden drenajlarının (AMD) fenton prosesiyle arıtımı. Selçuk Üniversitesi, Yayımlanmış yüksek lisans tezi, Konya.
