STATISTICAL INVESTIGATION OF ADSORPTION OF TWO REACTIVE TEXTILE DYES BY VARIOUS ADSORBENTS

Textile industry, in which uses the dyestuffs containing coloured and complex chemical compounds, is both water consumer and water pollutant. The removal of these compounds from the wastewaters is one of the most important problems in the textile industry. In this study, the adsorption of two reactive dyes (Red Px and Yellow P) onto Aþkale and Balkaya lignites, Bensan clay and powdered active carbon (PAC) from aqueous solution was statistically investigated. The adsorption time, dye concentration, solid/liquid ratio and mixing rate were chosen as parameters. The effects of these parameters on the amount of dye adsorbed by the adsorbents were determined. The results obtained have been statistically evaluated by using the stepwise method and SPSS Sortware version (9.1). The experimental observations and statistical evaluations shown that the effective parameters on the adsorption are equilibrium dye concentration and solid/liquid ratio. It was found that the adsorptive behaviours of both lignites and clay are similar to each other, but powdered active carbon displays different adsorptive behaviour. Finally, the empirical equations showing the relation between amount of dye adsorbed and the effective parameters were developed.

REAKTÝF ÝKÝ TEKSTÝL BOYALARININ FARKLI ADSORBENTLERLE ADSORPSÝYONUNUN ÝSTATÝSTÝKSEL ÝNCELENMESÝ

Renkli ve karmaþýk kimyasal bileþikleri içeren boyar maddeleri kullanan tekstil endüstrisi hem temel bir su kullanýcýsý hem de kirleticisidir. Atýk sudan bu bileþiklerin uzaklaþtýrýlmasý tekstil endüstrisindeki en önemli problemlerden biridir. Bu çalýþmada, sulu çözeltiden aktif karbon, Bensan kili, Aþkale ve Balkaya linyitleri üzerine 2 reaktif boyanýn (Red Px ve Yellow P) adsorpsiyonu istatistiksel olarak araþtýrýldý. Parametreler olarak adsorpsiyon zamaný, boya konsantrasyonu, katý/sývý oraný ve karýþým hýzý seçildi. Adsorbentler tarafýndan adsorplanan boyanýn miktarý üzerine bu parametrelerin etkileri belirlendi. Elde edilen sonuçlar SPSS Sortware versiyonu (9.1) ve Stepwise metodu kullanýlarak istatistiksel olarak deðerlendirildi. Deneysel gözlemler ve istatistiksel deðerlendirmeler adsorpsiyon üzerine etkili parametrelerin katý/sývý oraný ve denge boya konsantrasyonu olduðunu gösterdi. Hem linyitlerin hem de kilin adsorpsiyon davranýþlarýnýn birbirine benzer olduðu fakat aktif karbonun farklý adsorpsiyon davranýþý gösterdiði bulundu. Sonunda, etkili parametreler ve adsorplanan boyanýn miktarý arasýnda iliþkiyi gösteren ampirik denklem geliþtirildi.