Synthesis of Fe3O4 Nanoparticles Modified with Hyper Branched Dendrimers to Remove Anthracene from Contaminated Water
Introduction: Anthracene is one of the chemical and persistent pollutants released into the environment and the food chain causing irreparable damage to the immune system. This study aimed at removing anthracene from aqueous solutions using modified magnetic nanoparticles. Materials & Methods: Initially, Fe3O4 nanoparticles were synthesized with silicon dioxide shell and then modified with organic dendrimers. The adsorbent product characterized by Fourier-transform infrared, X-ray diffraction, and scanning electron microscopy. Following that, the effects of different operational parameters in the adsorption process were investigated in this study, and the UV-Vis spectrophotometer was used to measure the anthracene content in the solutions. The adsorbent resuscitation was also assessed in this study. Findings: The highest level of removal efficiency was obtained at the reaction time of 10 min, the adsorbent dosage of 0.7 g/L, and anthracene concentration of 20 mg L−1 at pH=7. The results showed that the adsorption process followed the Langmuir isotherm and pseudo-second-order kinetics. Furthermore, the adsorbent product was capable of resuscitation up to 5 cycles. Discussion & Conclusions: According to the results, the synthesized magnetic dendrimer was able to remove anthracene from aqueous solutions of contaminated water with high efficiency.
Removal of Diazinon Pesticide Using Amino-silane Modified Magnetite Nanoparticles from Contaminated Water
A magnetically recoverable adsorbent has been prepared by silica-coated magnetic nanoparticles through an amine functionality (ASMNPs). The ASMNPs were characterized by XRD, TEM, SEM, and FT-IR spectroscopy. It was used as an efficient and economical adsorbent for removing O, O-Diethyl O-[4-methyl-6-(propan-2-yl) pyrimidin-2-yl] phosphorothioate (diazinon) from...متن کامل
Fe3O4/CNT Magnetic Nanocomposites as Adsorbents to Remove Organophosphorus Pesticides from Environmental Water
In this study, a method for extraction and preconcentration of trace amounts of organophosphorus pesticides (OPPs) in environmental water using magnetic solid phase extraction (magnetic-SPE) followed by high performance liquid chromatography (HPLC) with UV detection was developed. The magnetic carbon nanotube adsorbents (Fe3O4/CNT) were synthesized by grafting carbo...متن کامل
periphery, which forms a closed membrane-like structure . When a critical stage is reached dendrimers cannot grow because of steric hindrance. This is sometimes referred to as ‘starburst effect’. In case of PAMAM dendrimers the starburst effect can be observed after the tenth generation . Number of terminal functional groups also increases exponentially with the increased branch density. ...متن کامل
ABSTRACT-Nowadays farmers often use N-fertilizers to increase crop yield, but they lost quickly by leaching causes environmental contaminations that reported as most important source of pollutant. Although biofilters are useful for removing nitrate from drainage water, but many researches show that they need an external carbon source to sustain denitrification. Many researchers study on differe...متن کامل
Atrazine is one of the most frequently used herbicides. This usage coupled with its mobility and recalcitrant nature in deeper soils and aquifers makes it a frequently encountered groundwater contaminant. We formed biobarriers in sand filled columns by coating the sand with soybean oil; after which, we inoculated the barriers with a consortium of atrazine-degrading microorganisms and evaluated ...متن کامل
Multifunctional glucose biosensors from Fe3O4 nanoparticles modified chitosan/graphene nanocomposites
Novel water-dispersible and biocompatible chitosan-functionalized graphene (CG) has been prepared by a one-step ball milling of carboxylic chitosan and graphite. Presence of nitrogen (from chitosan) at the surface of graphene enables the CG to be an outstanding catalyst for the electrochemical biosensors. The resulting CG shows lower ID/IG ratio in the Raman spectrum than other nitrogen-contain...متن کامل
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دوره 27 شماره 6
صفحات 1- 13
تاریخ انتشار 2020-01
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