Dichlorvos Biyosorpsiyonunun Termodinamik ve Kinetiği

Öz

Diklorvos Dünyanın pek çok ülkesinde olduğu gibi, Türkiye’de de oldukça yaygın olarak kullanılan bir pestisiddir. Dichlorvos’un sulu ortamdan uzaklaştırılmasında Rhodopseudomonas palustris NU51 suşunun kullanılmasıyla ilgili bir çalışmada adsorpsiyon izotermlerinden olan Langmuir ve Freundlich izotermlerine uygunluğu gösterilmiştir. Bu çalışmada termodinamik parametreleri (∆G0, ∆H0, ∆S0) incelenmiştir. Buna göre biyosorpsiyonun ekzotermik olduğu, kinetik hesaplamalardan da tepkime hızının pseudo ikinci derece denklemine uyduğu ve biyosorpsiyon için aktivasyon enerjisinin yaklaşık 160 kJ mol-1 olduğu tespit edilmiştir. Farklı sıcaklıklarda elde edilen termodinamik verilerden optimal adsorpsiyon sıcaklığının 35oC olduğu belirlenmiştir

Anahtar Kelimeler

• Adsorpsiyon, pseudo ikinci derece, kinetik, dichlorvos

Thermodynamics and Kinetics of Dichlorvos the Biosorption

Öz

Dichlorvos that is a pesticide, have been used in Turkey as widespread as in many developing countries. In a previously study, the results obtained from Dichlorvos removal from aqueous solution by Rhodopseudomonas palustris strain NU51, showed good fit to adsorption isotherms which are Langmuir and Freundlich isotherms. In this study, thermodynamic parameters (ΔG0, ΔH0, ΔS0) were examined. Accordingly, It has been shown that the biosorption was an exothermic reaction and its rate of reaction kinetic fit pseudo-second order equation. The activation energy for biosorption has been identified as about 160 kJmol-1. The optimal temperature of adsorption has been determined as 35oC from calculated thermodynamic data at different temperatures

Anahtar Kelimeler

• Adsorption, pseudo second order, kinetic, dichlorvos

Kaynakça

1. [1] Aksu Z, Application of biosorption for the removal of organic pollutants: A Review. Process Biochemistry, 40: 997-1026, (2005).
2. [2] Selimoğlu, H., Öztürk, A., Arısoy, M., Abdullah M.I. ,Biosoption of Dichlorvos by the anaerobic photosynthetic bacterium Rhodopseudomonas palustris NU51, Fresenius Bulletin, 20, 5, 1183-1189, (2011).
3. [3] Gan Q, Singh RM , Wu T, Jans U., Kinetics and Mechanism of Degradation of Dichlorvos in Aqueous Solutions Containing Reduced Sulfur Species, Environ. Sci. Technology, 40, 5717-5723, (2006).
4. [4] U.S.EPA.,Dichlorvos (DDVP, Vapona) Revocation of food additive tolerance: Final rule, Notice OPP-300237A.; FRL-4188-7,Fed.Regist. 58, 59663, (1993).
5. [5] Karahan,A.G.,Gürbüz,F. ve Tunçmen,H., Mikroalglerin Cu ve Cd Sorpsiyonu ve Desorpsiyonu, Su Ürünleri Dergisi 18/1 Özel sayı,173-182, (2001).
6. [6] Bell J P, Tsezos M., Removal of hazardous organic pollutant by adsorption on microbial biomass, Water Sci. Technology 19: 409–416, (1987).
7. [7] Gibson, J., and Harwood, C.S.,Metabolic diversity in aromatic compound utilization by anaerobic microbes, Annu. Rev. Microbiol. 56: 345–369, (2002).
8. [8] Lahme, S. Eberlein,C., Jarling,R., Kube,M., Boll,M., Wilkes, H.,Reinhardt, R. and Rabus, R., Anaerobic degradation of 4-methylbenzoate via aspecific 4- methylbenzoyl-CoA pathw, Environmental Microbiology 14(5), 1118–1132, (2012).

9. [9] Wang X, Cheng X, Sun D, Qi H., Biodecolorization and partial mineralization of reactive black 5 by a strain of Rhodopseudomonas palustris., J. Environ. Science., 20: 1218-1225, (2008).
10. [10]. Çelik, L., Öztürk, A. and Abdullah, M.I., Biodegradation of reactive red 195 azo dye by the bacterium Rhodopseudomonas palustris 51ATA, African Journal of Microbiology Research Vol. 6(1), 9,120-126, (2012).
11. [11] Erentürk, S., Malkoç,E., Removal of lead(II) by adsorption onto Viscum album L.:Effect of temperature and equilibrium isotherm analyses, Applied Surface Science 253, 4727–4733, (2007).
12. [12] Kalyani, G., Babu Rao, G., Vijaya Saradhi B.and Prasanna Kumar, Y., Equilibrium and Kinetic Studies on Biosorption of Zinc onto Gallus Domesticus Shell Powder, ARPN Journal of Engineering and Applied Sciences, 4, 1, 39- 49, (2009).
13. [13] Zhao, D., Zhang, J., Duan, E., Wang, J., Adsorption equilibrium and kinetics of dibenzothiophene from n-octane on bamboo charcoal, Applied Surface Science 254, 3242–3247, (2008).
14. [14] Yu, L.,and Ya-Juan. L.,Biosorption isotherms, kinetics and thermodynamics, Separation and Purification Technology, 61, 229-242, (2008).
15. [15] Munir, K., Yusuf, M., Noreen, Z., Hameed, A., Hafeez F. Y., And Faryal, R., Isotherm Studies for Determination of Removal Capacıty of Bi-Metal (Ni And Cr) Ions By Aspergillus Niger Pak., J. Bot., 42(1): 593-604, (2010).
16. [16] Tan,I.A.W.,Ahmad,A.L.,Hameed B.H.,Adsorption isotherms,kinetics, thermodynamics and desorption studies of 2,4,6-trichlorophenol on oil palm empty fruit bunch-based activated carbon, J. of Hazardous Materials, 164, 473–482, (2009).
17. [17] Sari,A., Tuzen,M., Biosorption of total chromium from aqueous solution by red algae(Ceramium virgatum): Equilibrium, kinetic and thermodynamic studies, J. of Hazardous Materials, 160, 349–355, (2008).
18. [18] Sari,A., Mendil,D., Tuzen,M., Soylak,M.,Biosorption of palladium(II) from aqueous solution by moss (Racomitrium lanuginosum) biomass: Equilibrium, kinetic and thermodynamic studies, J. of Hazardous Materials, 162, 874–879,(2009).
19. [19] Gao, J., Zhang, Q., Su, K., Chen, R., Peng, Y.,Biosorption of Acid Yellow 17 from aqueous solution by non-living aerobic granular sludge, J. of Hazardous Materials, 174, 215–225, (2010).
20. [20] Ho ,Y.S., McKay, G., The kinetics of sorption of basic dyes from aqueous solution by sphagnum moss peat, Can. J. Chem. Eng., 76, 822–827, (1998).
21. [21] A.M.M. Vargas, A. L. Cazetta, M. H. Kunita, T. L. Silva, V. C. Almeida, Adsorption of methylene blue on activated carbon produced from flamboyant pods (Delonix regia): Study of adsorption isotherms and kinetic models, Chemical Engineering Journal, 168, 722–730,(2011).
22. [22] M.A. Al-Ghoutia,, M.A.M. Khraishehb,M.N.M. Ahmad, S., Allen, Adsorption behaviour of methylene blue onto Jordanian diatomite:A kinetic study, Journal of Hazardous Materials, 165, 589–598,(2009).
23. [23] Akar, S., T., Uysal, R., Untreated clay with high adsorption capacity for effective removal of C.I. Acid Red 88 from aqueous solutions: Batch and dynamic flow mode studies, Chemical Engineering Journal, 162, 591–598,(2010).
24. [24] Hameed, B.H., Equilibrium and kinetics studies of 2,4,6-trichlorophenol adsorption onto activated clay, Colloids and Surfaces A: Physicochem. Eng. Aspects 307, 45-52, (2007).
25. [25] Bekçi, Z., Yoldaş,S., Yurdakoç,M. K., Equilibrium studies for trimethoprim adsorption on montmorillonite KSF, Journal of Hazardous Materials B133, 233–242, (2006).
26. [26] Özcan, A. S., Özcan, A., Adsorption of acid dyes from aqueous solutions onto acid-activated bentonite, Journal of Colloid and Interface Science 276, 39– 46,(2004)