Boron Removal by Aluminum Modified Pumice and Aluminum Hydroxide from Boron Mine Wastewater¬-Full Factorial Experimental Design

Öz

Boron removal by raw and aluminum modified pumice from Bigadiç colemanite mine wastewaters in Turkey were investigated. At Bigadiç mine, the colemanite ore is waited in water pools for swelling of attached clays (382 mg Boron/L) and then washed. The general wastewater of mine is stored in Çam Köy dam (608.1 mg Boron/L). The influence of pH (3-9), dilution ratio (1-10) and adsorbent dosage (1-05 g/50 mL) was studied for waiting pool wastewater. The maximum adsorption capacities of modified and raw pumice were calculated as 1.06 mg/g and 0.607 mg/g for waiting pool wastewater. In the experimental design for waiting pool wastewater, low and high parameter levels were pH (3 and 7), dilution fold (1 and 10) and adsorbent dosage (1 and 5 g/50 mL). According to confidence level (p<0.1) (23 factorial design), the statistically important sequence of factors for modified pumice were model constant, adsorbent amount, dilution, adsorbent amount-dilution ratio, pH-dilution ratio, pH, pH-adsorbent amount. The pseudo second order kinetic model described the boron adsorption. The isotherm data of study fitted to the Langmuir isotherm than Freundlich isotherm. As the adsorption capacity of aluminum modified pumice was not so high, the in-situ formed aluminum hydroxide was tested and provided about %75.35 boron removal from Çam Köy dam wastewater (608.1 mg Boron/L). 

Anahtar Kelimeler

• Aluminum hydroxide
• aluminum modified pumice
• boron mine wastewater
• factorial experimental design
• pumice

Bor Madeni Atık Suyundan Alüminyum Hidroksit ve Alüminyum Modifiye Edilmiş Ponza ile Bor Giderimi-Tam Faktöriyel Deneysel Tasarım

Öz

Türkiyedeki Bigadiç kolemanit madeni atıksuyundan bor giderimi ham ve alüminyumla modifiye edilmiş ponza minerali ile araştırılmıştır. Bigadiç madeninde kolemanit minerali yapışmış olan killerin şişmesi için havuzlarda bekletilmekte (382 mg Boron/L) ve yıkanmaktadır. Madenin genel atıksuyu Çam Köy barajında depolanmaktadır (608.1 mg Boron/L). pH (3-9), seyreltme oranı (1-10) ve adsorbent dozajı (1-5 g/ 50 mL) etkisi bekletme havuzu atıksuyu için çalışılmıştır. Bekletme havuzu atıksuyu için maksimum adsorpsiyon kapasiteleri modifiye edilmiş ve saf ponzalar için 1.06 mg/g and 0.607 mg/g olarak hesaplanmıştır. Deneysel tasarımda parametreler pH (3 ve 7), seyreltme oranı (1ve 10) and adsorbent dosajı (1ve 5 g/ 50 mL). Güvenilebilirlik katsayısına göre (p<0.1) (23 faktöriyel tasarım), istatistiksel olarak modifiye ponza için parameter sırası, model sabiti, adsorbent miktarı, seyreltme, adsorbent miktarı-seyreltme oranı, pH-seyreltme oranı, pH, pH-adsorbent miktarı olarak bulunmuştur. Yalancı ikinci mertebe reaksiyon modeli bor adsorpsiyonunu açıklamıştır. İzoterm verileri Freundlich izoterminden daha çok Langmuir izotermine uymuştur. Aluminyum ponzanın kapasitesi çok fazla yüksek olmadığı için, yerinde üretilmiş aluminyum hidroksit test edilmiştir ve %75.35 oranında Çam Köy barajı atıksuyunda bor giderimi sağlamıştır (608.1 mg Boron/L)

Anahtar Kelimeler

• Aluminyum hidroksit
• alüminyum modifiye pomza
• bor madeni atıksuyu
• faktöriyel deneysel tasarım
• pomza

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