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

Öz

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.

Anahtar Kelimeler

• Silver nanoparticle
• Activated carbon
• Chromium(VI)

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

Öz

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.

Anahtar Kelimeler

• Gümüş nanotanecik
• Aktif karbon
• Krom(VI)

Kaynakça

1. Aksu, Z., Açıkel, Ü., Kabasakal, E., Sezer, S., 2002, “Equilibrium Modelling of Individual and Simultaneous Biosorption of Chromium(VI) and Nickel(II) onto Dried Activated Sludge”, Water Research, Vol. 36, pp. 3063–3073.
2. Edebali, S., 2015, ‟Alternative Composite Nanosorbents Based on Turkish Perlite for the Removal of Cr(VI) from Aqueous Solution”, Journal of Nanomaterials, doi.org/10.1155/2015/697026.
3. Flippo, E., Serra, A., Buccolieri, A., Manno, D., 2010, “Green synthesis of silver nanoparticles with surose and maltose: Morphological and structural characterization”, Journal of Non-Crystalline Solids, Vol. 356, pp. 344–350.
4. Ghaedi, M., Biyareh, M. N., Kokhdan, S. N., Shamsaldini, S., Sahraei, R., Daneshfar, A., Shahriyar, S., 2012,‟ Comparison of the efficiency of palladium and silver nanoparticles loaded on activated carbon and zinc oxide nanorods loaded on activated carbon as new adsorbents for removal of Congo red from aqueous solution: Kinetic and isotherm study”, Materials Science and Engineering C, Vol. 32, pp. 725–734.
5. Ghaedi, M., Sadeghiana, B., Amiri Pebdani, A., Sahraei, R., Daneshfar, A., Duran, C., 2012, “Kinetics, thermodynamics and equilibrium evaluation of direct yellow 12 removal by adsorption onto silver nanoparticles loaded activated carbon”, Chemical Engineering Journal, Vol. 187, pp. 133–141.
6. Guo,Y., Qi, J., Yang, S., Yu, K., Wang, Z., Xu, H., 2002, ‟Adsorption of Cr(VI) on micro- and mesoporous rice husk-based active carbon”, Materials Chemistry and Physics, Vol. 78, pp.132–137.
7. Huuha, T. S., Kurniawan, T. A., Sillanpa, M. E. T., 2010, “Removal of silicon from pulping whitewater using integrated treatment of chemical precipitation and evaporation”, Chemical Engineering Journal, Vol. 158, pp. 584–592.
8. Kaewsarn, P., 2002, “Biosorption of Copper(II) from Aqueous Solutions By Pre-terated Biomass of Marine Algae Padina sp.”, Chemosphore, Vol. 47, pp. 1081–1085.

9. Nabi, S.A., Shahadat, M., Bushra, R., Shalla, A.H., Ahmed, F., 2010, “Development of composite ion-exchange adsorbent for pollutants removal from environmental wastes”, Chemical Engineering Journal, Vol. 165, pp. 405–412.
10. Najafi, M., Rostamian, R., Rafati, A. A., 2011, “Chemically modified silica gel with thiol group as an adsorbent for retentiono some toxic soft metal ions from water and industrial effluent”, Chemical Engineering Journal, Vol. 168, pp. 426–432.
11. Noginov, M. A., Zhu G., Bahoura, M., Adegoke, J., Small, C., Ritzo B. A., Drachev, V. P., Shalaev, V. M, 2006, “The effect of gain and absorption on surface plasmon in metal nanoparticles”, Applied Physics B, Vol. 86, pp. 455–460.
12. Pehlivan, E., Pehlivan, E., Kahraman, H. T., 2012, ‟Hexavalent chromium removal by Osage Orange”, Food Chemistry, Vol. 133, pp. 1478–1484.
13. Ramos, R. L., Juarez Martinez, A., Guerro Coronado, R. M., 1994, ‟Adsorption of chromium (VI) from aqueous solutions on activated carbon”, Water Science and Technology, Vol. 30 (9), pp. 191–197.
14. Sarin, V., Pant, K. K., 2006, “Removal of Chromium from Industrial Waste by Using Eucalyptus bark”, Bioresource Technology, Vol. 97, No. 1, pp. 15–20.
15. Zhu B., Fan T., Zhang D., 2008, “Adsorption of copper ions from aqueous solution by citric acid modified soybean straw”, Journal of Hazardous Materials, Vol.153, pp. 300–308.