Hidrofobik Mikrokürelerin Sulu Çözeltiden Dietilfitalat Uzaklaştırma Etkinliğinin Değerlendirilmesi

Bu çalışmada, hidrofobik poli(divinilbenzen-N-metakriloil-L-triptofan metil ester) [poli(DVB-MATrp)] mikroküreler (ortalama çap: 150-200 μm) sulu fazdan dietil fitalat (DEP) uzaklaştırılması için kullanıldı. Poli(DVB-MATrp) mikroküreler süspansiyon polimerizasyonu ile sentezlendi. Mikroküreler pH, başlangıç DEP derişimi, sıcaklık ve temas süresinin adsorplanan DEP miktarına etkisinin belirlenmesi amacıyla sulu çözeltiden DEP adsorpsiyonunda kullanıldı. Başlangıç DEP derişiminin etkisi 1-300 mg/L (pH 3.0) derişim aralığında araştırıldı. Deneyler üç farklı sıcaklıkta (25° C, 35° C and 45° C) gerçekleştirildi. Maksimum DEP adsorpsiyon kapasitesi pH değeri 3.0 olan sulu çözeltide 251,3 mg/g (25° C) olarak hesaplandı. Adsorpsiyonun ekzotermik doğasından dolayı poli(DVB-MATrp) mikroküreler üzerine adsorplanan DEP miktarı artan sıcaklıkla azalış gösterdi. Kinetik çalışmalar adsorpsiyonun yaklaşık 30 dakikada dengeye ulaştığını kanıtladı. Adsorpsiyon Langmuir izoterm modeline uygun olarak gerçekleşti. Adsorpsiyon verilerinin değerlendirilmesi için yalancı-birinci derece ve yalancı-ikinci derece kinetik modeller kullanıldı. Hazırlanan mikroküreler DEP adsorpsiyon kapasitesinde belirgin bir değişiklik olmaksızın tekrar tekrar kullanıldı. Poli(DVB-MATrp) mikroküreler aynı zamanda DEP katılmış şişe suyu ve çeşme suyu örneklerinde etkin olarak kullanıldı.

Evaluation of the Effectiveness of Hydrophobic Microbeads for Diethyl Phthalate Removal from Aqueous Solution

In this study, hydrophobic poly(divinylbenzene-N-methacryloyl-L-tryptophan methyl ester) [poly(DVB-MATrp)] microbeads(average diameter = 150-200 μm) were used for diethyl phthalate (DEP) removal from aqueous solution. The poly(DVBMATrp) microbeads were synthesized by suspension polymerization. The microbeads were used for DEP adsorption fromaqueous solution to determine the effect of pH, initial DEP concentration, temperature and contact time on the adsorbedamounts of DEP. The effect of initial DEP concentration was investigated in the concentration range of 1-300 mg/L at pH3.0. The experiments were conducted at three different temperatures (25°C, 35°C and 45°C). The maximum DEP adsorptioncapacity was calculated as 251.3 mg/g at pH 3.0 (25°C). The adsorbed amount of DEP onto the poly(DVB-MATrp) wasdecreased with increasing temperature due to the exothermic nature of the adsorption. The kinetic studies demonstratedthat the adsorption process reached equilibrium at around 30 min. The Langmuir isotherm model fitted the adsorption data.The pseudo-first-order and pseudo-second-order kinetic models were employed to evaluate the adsorption process. Theprepared microbeads were repeatedly used for DEP adsorption without a significant change in the adsorption capacity. Thepoly(DVB-MATrp) microbeads were also effectively used in bottled, and tap water samples spiked with DEP.

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1. A. Charles Staples, R. Dennis Peterson, F. Thomas Parkerton, J. William Adams, The environmental fate of phthalate esters: a literature review, Chemosphere, 35 (1997) 667-749.
2. J. Manori Silva, E. Samandar, A. John Reidy, R. Hauser, L. Larry Needham, M. Antonia Calafat, Metabolite profiles of di-n-butylphthalate in humans and rats, Environ. Sci. Technol., 41 (2007) 7576-7580.
3. K. Kelly Ferguson, R. Loch-Caruso, D. John Meeker, Urinary phthalate metabolites in relation to biomarkers of inflammation and oxidative stress: NHANES 1999-2006, Environ. Res., 111 (2011) 718-726.
4. K. Selma Kranich, H. Frederiksen, A. Maria Andersson, N. Jørgensen, Estimated daily intake and hazard quotients and indices of phthtalate diesters for Young danish men, Environ. Sci. Technol., 48 (2013) 706-712.
5. L. Emma Bradley, A. Richard Burden, I. Leon, N. David Mortimer, R. Dennis Speck, L. Castle, Determination of phthalate dieters in foods, Food Addit. Contam. A, 30 (2013) 722-734.
6. Y. Bouhamidi, F. Kaouah, L. Nouri, S. Boumaza, M. Trari, Adsorption of diethyl and dibutylphthalates onto activated carbon produced from Albiziajulibrissinpods: kinetics and isotherms, Int. J. Environ. Sci. Technol., 14 (2017) 271-284.
7. S. Venkata Mohan, S. Shailaja, M. Rama Krishna, P.N. Sarma, Adsorptive removal of phthalate ester (Di-ethylphthalate) from aqueous phase by activated carbon: a kinetic study, J. Hazard. Mater., 146 (2007) 278-282.
8. E. Tümay Özer, B. Osman, A. Kara, N. Beşirli, Ş. Gücer, H. Sözeri, Removal of diethylphthalate from aqueous phase using magneticpoly (EGDMA–VP) beads, J. Hazard. Mater., 229 (2012) 20-28.
9. N. Chen, G. Fang, D. Zhou, J. Gao, Effects of clay minerals on diethylphthalate degradation in Fenton reactions, Chemosphere, 165 (2016) 52-58.
10. K. Muzamil Gani, A. Ahmad Kazmi, Phthalate contamination in aquatic environment: A critical review of the process factors that influence their removal in conventional and advanced wastewater treatment, Critical Reviews In Environmental Science and Technol., 46 (2016) 1402-1439.11. I. Gultekin, N.H.Ince, Synthetic endocrine disruptors in the environment and water remediation by advanced oxidation processes, J. Environ. Manag., 85 (2007) 816-832.
12. Z. Dan Wen, D. Wen Gao, W. MinWu, Biodegradation and kinetic analysis of phthalates by an Arthrobacter strain isolated from constructed wet land soil, Appl. Microbiol. Biotechnol., 98 (2014) 4683-4690.
13. N. Singh, V. Dalal, J. Krishna Mahto, P. Kumar, Biodegradation of phthalic acid esters (PAEs) and in silico structural characterization of mono-2-ethylhexyl phthalate (MEHP) hydrolase on the basis of close structural homolog, J. Hazard. Mater., 338 (2017) 11-22.
14. Z. Xu, W. Zhang, B. Pan, C. Hong, L. Lv, Q. Zhang, B. Pan, Q. Zhang, Application of the Polanyi potential theory to phthalates adsorption from aqueous solution with hypercross-linked polymer resins, J. Colloid Interface Sci., 319 (2008) 392-397.
15. Z. Xu, W. Zhang, B. Pan, L. Lv, Z. Jiang, Treatment of aqueous diethylphthalate by adsorption using a functional polymer resin, Environ. Technol., 32 (2011) 145-153.
16. E.Tümay Özer, B. Osman, A. Kara, E. Demirbel, N. Beşirli, Ş. Güçer, Diethylphthalate removal from aqueous phase using poly(EGDMA-MATrp) beads: kinetic, isothermal and thermodynamic studies, Environ. Technol., 36 (2015) 1698- 1706.
17. E. Tümay Özer, A. Göçenoğlu Sarıkaya, B. Osman, Adsorption and removal of diethylphthalate from aqueous media with poly(hydroxyethylmethacrylate) nanobeads, Desalin. Water Treat., 57 (2016) 28864-28874.
18. B. Osman, L. Uzun, N. Beşirli and A. Denizli, Microcontact imprinted surface Plasmon resonance sensor for myoglobin detection, Mater. Sci. Eng. C, 33 (2013) 3609-3614.
19. I. Langmuir, The constitution and fundamental properties of solids and liquids. Part I. Solids, J. Am. Chem. Soc., 38 (1916) 2221-2295.
20. H.M.F. Freundlich, Over the adsorption in solution, J. Phys. Chem., 57 (1906) 385-471.
21. S. Lagergren, Zur theorie der sogenannten Adsorption geloster stoffe, Kungliga Svenska Vetenskapsakademiens, Handlingar 25 (1898) 1-39.
22. Y.S. Ho, G. McKay, Pseudo-second-order model for sorption processes, Process Biochem., 34 (1999) 451-465.
23. M. A. Shaida, R.K. Dutta, A.K. Sen, Removal of diethyl phthalate via adsorption on mineral rich waste coal modified with chitosan, Journal of Molecul. Liquids, 261 (2018) 271-282.
24. Y. Bouhamidi, F. Kaouah, L. Nouri, S. Boumaza, M. Trari & Z. Bendjam, Kinetic, thermodynamic, and isosteric heat of dibutyl and diethyl phthalate removal onto activated carbon from Albizzia julibrissin pods, Particul. Sci. Technol., 36 (2018) 235-243.
25. N.A. Khan, B.K. Jung, Z. Hasan, S.H. Jhung, Adsorption and removal of phthalic acid and diethyl phthalate from water with zeolitic imidazolate and metal–organic frameworks, J. Hazard. Mater. 282 (2015)194-200.
26. Q. Shi, A. Li, Q. Zhou, C. Shuang, Y. Li, Removal of diethyl phthalate from aqueous solution using magnetic iron– carbon composite prepared from waste anion exchange resin, J. Taiwan Inst. Chem. Eng., 45 (2014) 2488-2493.