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- W4313367661 endingPage "117145" @default.
- W4313367661 startingPage "117145" @default.
- W4313367661 abstract "A unique composite based on graphene oxide, magnetite, and diatomite was synthetized by eco-friendly dry coating technique for the removal of four toxic organochlorine pesticides from agricultural drainage. The prepared composite was fully characterized using X-ray fluorescence (XRF), X-ray diffraction (XRD), particle size analyzer, Vibrating-sample magnetometer (VSM), magnetic susceptibility meter, zeta potential, scanning electron microscopy-energy dispersive X-ray spectrometer (SEM-EDS), and Brunauer-Emmett-Teller analysis (BET) techniques. The characterization results confirmed the fabrication of a discrete core/shell structured composite possess both adsorptive and magnetic nature. The surface area, pore volume and pore diameter were 23.4 m2/g, 0.0026 cm3/g, and 4.5 nm, respectively. The amenability to use the fabricated composite as an adsorbent for some organochlorine pesticides was investigated under different conditions of concentration, time, pH, and temperature. Batch adsorption experiment showed that 97% removal efficiency was observed for all the studied pesticides with adsorption capacities of 7.78 mg/g after 2 h contact time and at any pH region. The adsorption was exothermic (ΔH < 0), spontaneous (ΔG° < 0), followed pseudo 2nd order kinetics (R2 > 0.998), and fitted well to Langmuir's isotherm pattern for all pesticides (R2 > 0.98). It is assumed that organochlorine pesticides were initially physisorbed by the graphene nanoplatelets via hydrophobic and π-π interactions along with chemisorption for forming monolayer. Moreover, the pesticides molecules could diffuse in the DMG composite micropores and be trapped in the structural defects. The regeneration of the composite exhibited over 90% removal efficiency even after seven cycles. The fabricated composite was examined to remove organochlorine from a real water sample, the obtained results suggest the possibility to use this composite as an economical, effective and sustainable adsorbent for the treatment of pesticides contaminating water." @default.
- W4313367661 created "2023-01-06" @default.
- W4313367661 creator A5061528807 @default.
- W4313367661 creator A5068366927 @default.
- W4313367661 creator A5088286380 @default.
- W4313367661 creator A5090293268 @default.
- W4313367661 date "2023-03-01" @default.
- W4313367661 modified "2023-09-26" @default.
- W4313367661 title "Graphene-magnetite functionalized diatomite for efficient removal of organochlorine pesticides from aquatic environment" @default.
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- W4313367661 doi "https://doi.org/10.1016/j.jenvman.2022.117145" @default.
- W4313367661 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36586365" @default.
- W4313367661 hasPublicationYear "2023" @default.
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