Evaluation of The Performance of Green Synthesized Silver Nanopartıcle Loaded Activated Carbon For The Removal Of Cr(VI) Ions

Year 2016, Volume: 4 Issue: 3, 208 - 215, 01.09.2016

Serpil Edebali Havva Tutar Kahraman

https://doi.org/10.15317/Scitech.2016320516

Abstract

The objective of this study was to evaluate the usability of silver nanoparticles loaded on activated carbon (SNP-AC) for the removal of Cr(VI) metal ions from aqueous solutions. Following the optimization of the effect of variables (batch method) including pH, contact time, initial metal concentration and amount of SNP-AC on Cr(VI) removal method, the isotherm study was carried out by taking different models into consideration. Based on difference in Cr(VI) contents (measuring by a UV–vis spectrophotometer) before and after adsorption, the removal percentage was calculated. The equilibrium experimental data well fitted to the Langmuir models with maximum adsorption capacity of 71,4 mg SNP-AC. The results of this study indicated that silver nanoparticle coated activated carbon (SNP-AC) might be a good promising alternative material for the removal of Cr(VI) metal ion owing to its high adsorption capacity in short equilibrium time.

Keywords

Silver nanoparticle, Activated carbon, Chromium(VI)

‟YEŞİL SENTEZ” YÖNTEMİYLE ÜRETİLMİŞ GÜMÜŞ NANOTANECİK YÜKLÜ AKTİF KARBONUN Cr(VI) GİDERİMİNDEKİ PERFORMANSININ DEĞERLENDİRİLMESİ

Abstract

Bu çalışma, sulu çözeltilerden krom(VI) iyonunun uzaklaştırılmasında gümüş (Ag) nanotanecik yüklü aktif karbonun (AgNP-AK) adsorban olarak kullanımının değerlendirilmesini amaçlamaktadır. pH etkisi, adsorban miktarı, temas süresi ve başlangıç metal konsatrasyonu gibi parametrelerin incelenmesi ile gerekli optimizasyon şartları belirlendikten sonra farklı izoterm modelleri üzerinde çalışılmıştır. Adsorpsiyon öncesi ve sonrası çözeltideki metal iyon değişimleri UV–vis spektrofotometresi ile tayin edilmiştir. Elde edilen denge eğrisi, Langmuir izoterm modeline daha çok uygunluk göstermiş ve maksimum adsorplama kapasitesi 71,4 mg olarak hesaplanmıştır. Bu çalışma ile elde edilen veriler ışığında çevreci bir yöntemle elde edilen AgNP-AK adsorbanının krom(VI) iyonunun uzaklaştırılmasında umut vaadeden yeni bir alternatif olabileceği sonucuna varılmıştır.

Keywords

Gümüş nanotanecik, Aktif karbon, Krom(VI)

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