Demir hidroksitle kolemanit madeni atıksuyundan bor gideriminin full faktöriyel deney tasarımı

Öz

Bu çalışmada, jar testi reaktörlerinde demir klorür kullanılarak demir hidroksit üretildi ve bor içeren sentetik çözeltiler ile Kolemanit madeni atık suyundan bor gideriminde kullanıldı.  Bor ve demir hidroksit arasındaki denge süresi 32.5 dakika olarak belirlendi. Sentetik çözeltilerde demir hidroksitin bor adsorpsiyon kapasitesindeki değişim; pH (7-10), konsantrasyon (50-250 mg/L), demir klorür miktarı (2.5-10 g) ve sıcaklık (22.5-40 oC) olarak belirlenen parametre aralıklarında araştırıldı.  Bor giderimi için optimum pH 7 olarak elde edildi.  Bor konsantrasyonundaki artış bor adsorpsiyonunu artırdığından, optimum bor konsantrasyonu 250 mg/L olarak elde edildi.  Demir hidroksitin bor adsorpsiyon kapasitesi azalan demir hidroksit dozajı ile arttı.  Demir hidroksit üzerine bor adsorpsiyonunun ekzotermik olduğu belirlendi.  Sentetik çözeltilerden elde edilen veriler 22 full faktöriyel deney tasarımı kullanılarak kolemanit madeni atık suyuna uygulandı ve faktörler seyreltme (1 ve 10 kat) ve dozaj (5 ve 10 g) olarak alındı.  Demir hidroksit ile bor gideriminin optimizasyonu Pareto kartı ile yapıldı.  Maksimum kapasite 23.80 mg/g olarak hesaplandı.

Anahtar Kelimeler

• Bor giderimi,kolemanit madeni atıksuyu,full faktöriyel tasarım,demir hidroksit

Full factorial design of experiments for boron removal by iron hydroxide from colemanite mine wastewater

Öz

In this study, iron hydroxide was in-situ generated from iron chloride in the jar test reactors and used for boron removal from both synthetic solutions and colemanite mine wastewater.  A time span of 32.5 minutes was enough for equilibrium between boron and iron hydroxide.  In the synthetic boron solutions, the variations of boron adsorption capacity of iron hydroxide were investigated by the experimental parameters chosen as pH (7-10), concentration (50-250 mg/L), iron chloride amount (2.5-10 g) and temperature (22.5-40 oC).  The optimum pH value for boron removal was determined as 7.  Because the higher boron concentrations supported to the boron uptake of iron hydroxide, the optimum boron concentration was 250 mg/L.  The boron uptake capacity of iron hydroxide increased with decreasing iron chloride dosage.  The boron adsorption onto the iron hydroxide was an exothermic process.  The optimum conditions obtained from the synthetic solution experiments were applied to the colemanite mine wastewater by 22 full factorial experimental design of factors which were dilution (1 and 10 fold) and iron chloride amount (5 and 10 g).  The optimization of boron removal by iron hydroxide was realized by analyzing Pareto chart.  Maximum capacity was calculated as 23.80 mg/g.

Anahtar Kelimeler

• Boron removal,colemanite mine wastewater,full factorial design,iron hydroxide

Kaynakça

1. Korkmaz, M., Özmetin, C., Fil, B.A., Modelling of boron removal from solutions using Purolite S 108 in a batch reactor, Clean Soil Air Water, 44(8), 949-958, (2016).
2. Halim, A.A., Thaldiri, N.H., Awang, N., and Latif, M.T., Removing boron from an aqueous solution using turmeric extract-aided coagulation-flocculation, American Journal of Environmental Sciences, 8(3), 322-327, (2012).
3. Yilmaz, A.E., Boncukcuoğlu, R., Kocakerim, M.M., Yilmaz, M.T., Paluluoğlu, C., Boron removal from geothermal waters by electrocoagulation, Journal of Hazardous Materials, 153, 146–151, (2008).
4. Öztürk, N., Köse, T.E., Boron removal from aqueous solutions by ion-exchange resin: Batch studies, Desalination, 227, 233–240, (2008).
5. Tagliabue, M., Reverberi, A.P., Bagatin, R., Boron removal from water: needs, challenges and perspectives, Journal of Cleaner Production, 77, 56–64, (2014).
6. Şahin, S., A mathematical relationship for the explanation of ion exchange for boron adsorption, Desalination, 143, 35-43, (2002).
7. Duman, M.V., Özmetin, E., Boron removal from wastewater originating in the open pit mines of Bigadiç Boron work by means of reverse osmosis, International Journal of Global Warming, 6 (2-3), 252-269, (2014).
8. Özmetin, C., Aydın, Ö., Kocakerim, M.M., Korkmaz, M., Özmetin, E., An empirical kinetic model for calcium removal from calciumimpurity-containing saturated boric acid solution by ion exchange technology using Amberlite IR–120 resin, Chemical Engineering Journal, 148, 420–424, (2009).

9. Foote, F.J., Determination of boron in waters: method for direct titration of boric acid, Industrial and Engineering Chemistry Analytical Edition, 4, 39–42, (1932).
10. Na, J.W., Lee, K.J., Characteristics of boron adsorption on strong-base anion-exchange resin, Annual Nuclear Energy, 20, 455–462, (1993).
11. Çetintaş, S., Lateritik cevherden sülfürik asit ile nikel kazanımına deneysel tasarım yaklaşımı ve kinetik modelleme, Yüksek Lisans Tezi, Kocaeli Üniversitesi, Fen Bilimleri Enstitüsü, Kocaeli, (2014).
12. Bayar, D., Sulu çözeltilerden adsorpsiyonla bor giderimi ve deneysel tasarımı, Yüksek Lisans Tezi, Osmangazi Üniversitesi, Fen Bilimleri Enstitüsü, Eskişehir, (2001).
13. Demir, C., Tokatlı, F., Ertaş, H., Özdemir, D., II Kemometri Yaz Okulu, İzmir İleriteknoloji Enstitüsü Yayınları, 56-69s, (2009).
14. Kavak, D., Boron adsorption by clinoptilolite using factorial design, Environmental Progress & Sustainable Energy, 30, 527–532, (2011).
15. Korkmaz, M., Fil, B.A., Özmetin, C., Yaşar, Y., Full factorial design of experiments for boron removal from Colemanite mine wastewater using Purolite S 108 resin, Bulgarian Chemical Communication, 46, 594–601, (2014).