PURIFICATION OF TEXTILE DYE BY PHOTOCATALYTIC OXIDATION PROCESS USING METAL MODIFIED CHITOSAN BALLS

Yıl 2025, Sayı: 8 ÇEVRE, 143 - 151, 05.02.2025

Zülal Demirkaya , Gizem Başaran Dindaş , Nihal Bektaş , Hüseyin Cengiz Yatmaz

Öz

In this study, cobalt, iron (II), iron (III) and copper metals were determined to be loaded into the chitosan biopolymer obtained from chitin produced by biosynthesis in nature to be used as a catalyst in the photocatalytic oxidation process to remove the dyestuff, and peroxymonosulfate (PMS) was selected as the oxidant. After the determined metals were loaded into the prepared chitosan beads, the photocatalytic process was studied with the solutions prepared at 20 mg/L concentration using direct orange 46 dye, catalysts loaded with four different metals and PMS, and the removal data measured with a spectrophotometer were recorded. In the light of these studies, since it was observed that cobalt-loaded chitosan beads accelerated the reactions and gave very good results, studies were continued with these catalysts at 50 and 100 mg/L concentrations. Studies were also carried out to optimize the amount of catalyst and PMS, to observe the efficiency whether light was used in the process or not, and to compare the effect of UVA or UVA LED lights when light was required. Finally, the same processes were applied to real wastewater of a textile company, using cobalt-loaded chitosan beads as catalysts. As a result, it was observed that high efficiency was achieved by using cobalt-loaded chitosan beads as catalysts in the photocatalytic process.

Anahtar Kelimeler

Metal Modified Chitosan Bead, PMS, Photocatalytic Oxidation, Textile Dyestuff.

TEKSTİL BOYAR MADDESİNİN METAL MODİFİYELİ KİTOSAN BİLYELER KULLANILARAK FOTOKATALİTİK OKSİDASYON PROSESİ İLE ARITIMI

Öz

ÖZ
Bu çalışmada boyar maddenin giderilmesi amacıyla fotokatalitik oksidasyon prosesinde katalizör olarak kullanılmak üzere doğada biyosentez ile üretilen kitinden elde edilen kitosan biyopolimerine yüklenmek üzere kobalt, demir (II), demir (III) ve bakır metalleri belirlendi ve oksidant olarak peroksimonosülfat (PMS) seçildi. Belirlenen metaller hazırlanan kitosan bilyelerine yüklendikten sonra direct orange 46 boyası kullanılarak 20 mg/L konsantrasyonda hazırlanan çözeltiler dört farklı metalle yüklenen katalizörler ve PMS ile fotokatalitik prosesi çalışılarak spektrofotometre ile ölçülen giderim verileri kaydedildi. Bu çalışmalar ışığında kobalt yüklü kitosan bilyelerinin tepkimeleri hızlandırıp oldukça iyi sonuçlar verdiği gözlemlendiğinden bu katalizörler ile 50 ve 100 mg/L konsantrasyonlar ile çalışmalara devam edildi. Ayrıca katalizör ve PMS miktarını optimize etmek ve proseste ışık kullanılıp kullanılmaması durumlarındaki verimleri gözlemlemek, ışık kullanılması gereken durumlarda UVA veya UVA led ışıklarının etkisini karşılaştırmak üzere de çalışmalar yapıldı. Son olarak bir tekstil firmasının gerçek atık suyu için kobalt yüklü kitosan bilyelerin katalizör olarak kullanılması ile aynı prosesler uygulandı. Sonuçta kobalt yüklü kitosan bilyelerin fotokatalitik prosesinde katalizör olarak kullanılmasıyla yüksek verimler elde edildiği gözlemlendi.

Anahtar Kelimeler

Metal Modifiyeli Kitosan Bilye, PMS, Fotokatalitik Oksidasyon, Tekstil Boyar Madde.

Kaynakça

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