Removal of 17β-estradiol from aqueous systems with hydrophobic microspheres

Abstract

Sub-microparticles have many applications in different fields today. In this study, it is aimed to develop hydrophobic microparticles as an alternative to existing methods and to determine the 17β-estradiol adsorption performance of this adsorbent to purify the 17β-estradiol hormone which is found as an endocrine disruptor in environmental waters with high capacity and low cost. In this study, l-phenylalanine containing Poly(HEMA-MAPA) microparticles were synthesized by microemulsion polymerization and used as adsorbent. Microparticles were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) methods. The size of the Poly(HEMA-MAPA) microparticles used was measured as 120–200 nm. Specific surface area and elemental analysis studies were also conducted. While the surface area of the particles was found to be a very high value of 1890 m2/g, the amount of incorporation of MAPA into the polymeric structure was calculated as 0.43 mmol/g. Adsorption studies were carried out in the batch system under different ambient conditions (17β-estradiol concentration, temperature, ionic intensity). The adsorption capacity of Poly(HEMA-MAPA) microparticles was calculated to be 98.4 mg/g. Isotherm models for adsorption interaction were investigated deeply, and it was determined that the adsorption mechanism is suitable for Langmuir isotherm.

Antibiotic Removal from the Aquatic Environment with Activated Carbon Produced from Pumpkin Seeds

“…Correlation between the equilibrium data and the Langmuir-1 isotherm model was found to be high (R 2 ) (Table 3). The Langmuir model is based on the assumption of homogeneous adsorption energies to the surface and the absence of adsorbate transition in the surface plane [40,[43][44][45][46][47][48][49][50].…”

Endosulfan Elimination Using Amine-Modified Magnetic Diatomite as an Adsorbent

“…The adsorption time of endosulfan adsorption on both m-DE-APTES and DE-APTES was investigated via the batch system (Erol et al, 2020;Erol and Uzun, 2017;Erol, 2017a;Erol, 2017b;Kireç et al, 2021;Erol et al, 2021;Erol, 2017c;Tosun Satir and Erol, 2021) at 25 °C. Throughout the experiments, four different endosulfan concentrations (100.0-750.0 mg L −1 ) were used at various times (10-60 min) (Figure 6). As shown in Figure 5, the adsorption capacity of m-DE-APTES for endosulfan increased within 45 min and then reached equilibrium at the 60th minute.…”

Microporous activated carbon developed from KOH activated biomass waste: surface mechanistic study of methylene blue dye adsorption

“…Three renowned isotherms (Langmuir, Freundlich, and Temkin) were adopted to describe MB dye-SBWAC interaction by means of adsorbent affinity and adsorption potential of SBWAC towards MB dye. Langmuir model specifically describes the homogeneous and monolayer adsorption on fixed adsorption sites (Kireç et al 2021). Freundlich model assumes the heterogeneous multilayer adsorption on different surface energies (Erol et al 2019a(Erol et al , 2019b Meanwhile, Temkin isotherm model describes that the heat of adsorption decreases with the adsorption coverage due to the adsorbent-adsorbate interactions (Bahrudin et al 2019).…”