Preparation of hydroxyapatite microspheres by hydrothermal self-assembly of marine shell for effective adsorption of Congo Red

Wang, Hongbo; Yan, Kuangqi; Chen, Jingdi

doi:10.1016/j.matlet.2021.130573

Cited by 22 publications

(1 citation statement)

References 12 publications

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“…Waste water produced from the plants can cause environmental pollution, one of the most serious causes for the worst environmental problems is dye wastewater. 1 In addition, owing to the potentially cancer-causing properties and the toxicity of the dyes, wastewater from the dye produced in factories has seriously polluted the surrounding environment and threatened human health, even at low concentrations. 2 Among all kinds of water pollutants in wastewater, organic compounds are fatal to human health.…”

Section: Introductionmentioning

confidence: 99%

Superior adsorption of methyl blue on magnetic Ni–Mg–Co ferrites: Adsorption electrochemical properties and adsorption characteristics

Chen

Wang

et al. 2022

Env Prog and Sustain Energy

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The harm and treatment of methyl blue (MB) were described, and the necessity for the removal of MB by magnetic nanomaterials was explained. Magnetic Ni-Mg-Co ferrites were prepared by the rapid combustion approach of an active nitrate solution and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), energy dispersive spectroscopy, and vibrating sample magnetometer. Magnetic Ni 0.1 Mg 0.7 Co 0.2 Fe 2 O 4 nanoparticles prepared at 400 C with the saturation magnetization of 19.7 emu g À1 and the average diameter of about 15.2 nm were used to adsorb MB from the aqueous medium. The Brunauer-Emmett-Teller (BET) analysis showed that the specific surface area was 143.17 m 2 g À1 and the average pore size was 9.44 nm. The adsorption mechanism of MB onto magnetic Ni 0.1 Mg 0.7 Co 0.2 Fe 2 O 4 nanoparticles was studied, and the results revealed that the adsorption properties conformed the pseudo-second-order kinetics model due to the square deviation values (R 2 > 0.98), and Temkin model could describe the adsorption state of MB onto Ni 0.1 Mg 0.7 Co 0.2 Fe 2 O 4 nanoparticles, which suggested that the adsorption of MB onto Ni 0.1 Mg 0.7 Co 0.2 Fe 2 O 4 nanoparticles was monolayer-multilayer hybrid chemisorption mechanism. When the pH value exceeded 3, the adsorbance reached large value; while, the adsorbance was 97.6% of the initial adsorption value for seven cycles. The electrochemical impedance spectroscopy and cyclic voltammetry curves of MB adsorbed onto the nanoparticles before and after the adsorption were determined.

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Section: Introductionmentioning

confidence: 99%