Open AccessExtraction of pesticide residues from plant extracts using regenerative MCM41 mesoporous materials
Author(s) -
Mihai-Alexandru Florea,
Bogdan Purcăreanu,
Adelina Bicu,
Veronica Drumea,
Cerasela Elena Gîrd,
Mihai Alexandru Grigoroscuta,
Dan Eduard Mihăiescu,
Gabriel Vasilievici,
Laura Olariu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/572/1/012008
Subject(s) - mesoporous material , adsorption , fourier transform infrared spectroscopy , mesoporous silica , scanning electron microscope , materials science , extraction (chemistry) , chromatography , gas chromatography , chemical engineering , chemistry , organic chemistry , composite material , engineering , catalysis
The aim of the current study was to determinate the adsorption degree of pesticide residues on MCM41 mesoporous material from plant extracts usually used in phytotherapeutic treatments. The choice of the material was based on the high adsorption capacity, due to the specific surface area, over 800 m2/g and for the possibility of their regeneration/reusability capacity. The silica matrix was synthesized starting from tetraethylorthosilicate (TEOS)- the silica source and hexadecyltrimethylammonium bromide (CTAB)- as a template agent, the whole process taking place in continuous flow at room temperature and normal pressure. The material obtained was characterized by microscopy techniques (transmission and scanning electron microscopy TEM and SEM) for determination of pores morphology, by standard method Brunauer-Emmett-Teller for pore size distribution and specific surface area (textural analysis- B.E.T), by Fourier-transform infrared spectroscopy (FTIR) for spectral fingerprint and by dynamic light scattering (DLS) for determination of hydrodynamic diameter of particles. The tests were carried out on extracts performed with organic solvents from some medicinal species ( Menthae officinalis, Salvia officinalis, Matricaria chamomilla ), using mesoporous material MCM41 for isolation / concentration of pesticide residues. Quantitation of pesticide residues was performed using a gas chromatograph coupled with a triple quadrupole mass spectrometer (GC-MS/MS), for both extracts and MCM41 material.