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

Authors : Bilgen OSMAN, Elif Tümay ÖZER

Pages : 77-85

View : 22 | Download : 8

Publication Date : 2019-02-01

Article Type : Research Paper

Abstract :In this study, hydrophobic polyinsert ignore into journalissuearticles values(divinylbenzene-N-methacryloyl-L-tryptophan methyl ester); [polyinsert ignore into journalissuearticles values(DVB-MATrp);] microbeads insert ignore into journalissuearticles values(average diameter = 150-200 μm); were used for diethyl phthalate insert ignore into journalissuearticles values(DEP); removal from aqueous solution. The polyinsert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(25°C, 35°C and 45°C);. The maximum DEP adsorption capacity was calculated as 251.3 mg/g at pH 3.0 insert ignore into journalissuearticles values(25°C);. The adsorbed amount of DEP onto the polyinsert ignore into journalissuearticles values(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 polyinsert ignore into journalissuearticles values(DVB-MATrp); microbeads were also effectively used in bottled, and tap water samples spiked with DEP.
Keywords : Diethyl phthalate, adsorption, microbead, endocrine disruptor