Amine-rich quartz nanoparticles for Cu(II) chelation and their application as an efficient catalyst for oxidative degradation of Rhodamine B dye

The study describes the loading of the quartz SiO 2 nanoparticles (NPs) with (3-aminopropyl)triethoxysilane (APTES) linker with simultaneous lengthening of the linker through the terminal amine group by glutaraldehyde (GA). The reactive polyethylenimine (PEI) was introduced to the surface to increas...

Full description

Saved in:
Bibliographic Details
Published in:Environmental science and pollution research international 2021-06, Vol.28 (22), p.28289-28306
Main Authors: Gemeay, Ali H., El-Halwagy, Mohamed E., Elsherbiny, Abeer S., Zaki, Ahmed B.
Format: Article
Language:English
Subjects:
Alkylation
Aminopropyltriethoxysilane
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Carbon dioxide
Catalysts
Chelation
Copper
Degradation
Dyes
Earth and Environmental Science
Ecotoxicology
Electron microscopy
Environment
Environmental Chemistry
Environmental Health
Environmental science
Flooding
Fourier analysis
Fourier transforms
Free radicals
Gas chromatography
Hydroxyl radicals
Infrared analysis
Infrared spectroscopy
Inorganic acids
Ions
Mass spectrometry
Mass spectroscopy
Microscopy
Nanoparticles
Organic carbon
Oxidation
Polyethyleneimine
Quartz
Reaction kinetics
Research Article
Rhodamine
Ring opening
Scanning electron microscopy
Silicon dioxide
Total organic carbon
Transmission electron microscopy
Treated water
Waste Water Technology
Water analysis
Water Management
Water Pollution Control
Water sampling
X ray analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The study describes the loading of the quartz SiO 2 nanoparticles (NPs) with (3-aminopropyl)triethoxysilane (APTES) linker with simultaneous lengthening of the linker through the terminal amine group by glutaraldehyde (GA). The reactive polyethylenimine (PEI) was introduced to the surface to increase the ability to capture Cu(II) ions. The composite got the abbreviation SiO 2 /PEI-Cu(II). The Cu(II) ions were the active center with a peroxo-complex activation state. The composite characterization included scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) surface analyzer. The kinetics of the oxidative degradation of Rhodamine B (RhB) dye obeyed the pseudo-first order under flooding conditions. The reaction parameters including the catalyst dose, solution pH, initial concentration of reactants, and temperature got some attention. The obtained results showed that more than 91.7 ± 1% of RhB dye was degraded to CO 2 , NH 4 + , NO 3 – , H 2 O, and some inorganic acids after 30 min as confirmed by gas chromatography mass spectrometry and total organic carbon (TOC) measurements. Also, GC-MS spectra for water samples drawn from the reaction in successive periods had suggested a conceivable degradation pathway for RhB by hydroxyl radicals. Degradation starts with de-alkylation then carboxyphenyl removal followed by two successive ring-opening stages. Both the effects of the catalyst recycling and treated water reusability on the reaction rate were studied. The catalyst provided noticeable stability over three consecutive cycles. Graphical abstract
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-021-12497-6