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Journals / Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi / 2018 / Cilt: 7 - Sayı: 1

EFFECT OF COAGULANTS AND FLOCCULANTS ON DEWATERING OF KAOLIN SUSPENSIONS

KAOLEN SÜSPANSİYONLARININ SUSUZLAŞTIRILMASINDA KOAGÜLANT VE FLOKÜLANTLARIN ETKİSİ

VİLDAN ÖNEN
Muhammed GÖÇER
HASAN ALİ TANER
Pages
297–305
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The highest sedimentation efficiency (94%) was achieved with anionic flocculants and the same sedimentation velocity (58 mm/min) was reached with all flocculants.

📌 3 Key Takeaways

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Objective & Hypothesis:Kaolin tailings are commonly generated in the mineral industry.
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Key Findings & Data:In experimental studies, Al2(SO4)3, FeCl3, MgCl2, CaCl2, NaCl were used as coagulant, while as flocculant anionic (A150), cationic (C521) and nonionic (N100) polymers were used.
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Conclusion & Impact:The highest sedimentation efficiency (94%) was achieved with anionic flocculants and the same sedimentation velocity (58 mm/min) was reached with all flocculants.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Kaolen · susuzlaştırma · polimer

Abstract

Kaolin tailings are commonly generated in the mineral industry. They are invariably negatively charged and consequently tend to form stable dispersions with poor flocculation characteristics. Coagulation–flocculation treatments are suitable methods for removing colloidal particles from wastewater. In this study, the effects of mono/multivalent ions (coagulants) and polymers (flocculants) on the sedimentation and electrokinetic behaviours of kaolin have been investigated. In experimental studies, Al2(SO4)3, FeCl3, MgCl2, CaCl2, NaCl were used as coagulant, while as flocculant anionic (A150), cationic (C521) and nonionic (N100) polymers were used. Isoelectric point of kaolin was determined as pH 4.2. The effectiveness of coagulants increased with the increase in the ionicity degree of the metal ions. Among the coagulants, FeCl3 provided the highest efficiency (91%). Low sedimentation velocities (6.3-12.2 mm/min) were obtained with coagulants. The highest sedimentation efficiency (94%) was achieved with anionic flocculants and the same sedimentation velocity (58 mm/min) was reached with all flocculants.

Özet

Kaolin atıkları mineral endüstrisinde yaygın olarak üretilir. Negatif yüklü olan bu atıklar zayıf flokülasyon özelliklerine sahip kararlı dağılımlar oluşturmaya eğilimlidirler. Koagülasyon-flokülasyon işlemleri, koloidal parçacıkları atık sulardan uzaklaştırmak için uygun yöntemlerdir. Bu çalışmada, mono/multivalent iyonların (koagülant) ve polimerlerin (flokülant) kaolenin çökelme ve elektrokinetik davranışlarına etkisi araştırılmıştır. Deneysel çalışmalarda, koagülant olarak Al2(SO4)3, FeCl3, MgCl2, CaCl2, NaCl ve flokülant olarak, anyonik (A150), katyonik (C521) ve noniyonik (N100) polimerler kullanılmıştır. Kaolenin sıfır yük noktası pH 4.2 olarak belirlenmiştir. Koagülantların etkinliği, metal iyonlarının iyoniklik derecesinin artması ile artmıştır. Koagülantlar arasında FeCl3 en yüksek verimi (%91) sağlamıştır. Koagülantlar ile düşük sedimantasyon hızları (6.3-12.2 mm/dk) elde edilmiştir. En yüksek sedimantasyon verimliliği (%94) anyonik flokülant ile sağlanmış ve tüm flokülantlar ile yaklaşık olarak aynı çökelme hızına (58 mm/dk) ulaşılmıştır.

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Cite This Article

ÖNEN, V., GÖÇER, M., TANER, H. A. (2018). EFFECT OF COAGULANTS AND FLOCCULANTS ON DEWATERING OF KAOLIN SUSPENSIONS. Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 7 - Sayı: 1, 297–305. https://ajindex.com/articles/290298

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