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

Abstract

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(DVB-MATrp) microbeads were synthesized by suspension polymerization. The microbeads were used for DEP adsorption from aqueous solution to determine the effect of pH, initial DEP concentration, temperature and contact time on the adsorbed amounts of DEP. The effect of initial DEP concentration was investigated in the concentration range of 1-300 mg/L at pH 3.0. The experiments were conducted at three different temperatures (25°C, 35°C and 45°C). The maximum DEP adsorption capacity was calculated as 251.3 mg/g at pH 3.0 (25°C). The adsorbed amount of DEP onto the poly(DVB-MATrp) was decreased with increasing temperature due to the exothermic nature of the adsorption. The kinetic studies demonstrated that 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. The prepared microbeads were repeatedly used for DEP adsorption without a significant change in the adsorption capacity. The poly(DVB-MATrp) microbeads were also effectively used in bottled, and tap water samples spiked with DEP.

Keywords

• Diethyl phthalate,adsorption,microbead,endocrine disruptor

References

1. 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.
2. 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.
3. 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.
4. 5. L. Emma Bradley, A. Richard Burden, I. Leon, N. David Mortimer, R. Dennis Speck, L. Castle, Determination of phthalate d ieters i n f oods, F ood A ddit. Contam. A , 30 (2013) 722-734.
5. 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.
6. 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.
7. 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.
8. 9. N. Chen, G. Fang, D. Zhou, J. Gao, Effects of clay minerals on diethylphthalate degradation in Fenton reactions, Chemosphere, 165 (2016) 52-58.

9. 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.
10. 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.
11. 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.
12. 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.
13. 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.
14. 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.
15. 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.
16. 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.
17. 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.
18. 19. I. Langmuir, The constitution and fundamental properties of solids and liquids. Part I. Solids, J. Am. Chem. Soc., 38 (1916) 2221-2295.
19. 20. H.M.F. Freundlich, Over the adsorption in solution, J. Phys. Chem., 57 (1906) 385-471.
20. 21. S. Lagergren, Zur theorie der sogenannten Adsorption geloster stoffe, Kungliga Svenska Vetenskapsakademiens, Handlingar 25 (1898) 1-39.
21. 22. Y.S. Ho, G. McKay, Pseudo-second-order model for sorption processes, Process Biochem., 34 (1999) 451-465.
22. 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.
23. 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.
24. 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.
25. 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.