Abstract
The magnetic adsorbent, Fe3O4@[Ni(HL)2]2H2[P2Mo5O23]·2H2O (Fe3O4@1), is synthesized by employing the nanoparticles Fe3O4 and polyoxometalate hybrid 1. Zero-field-cooled (ZFC) and field-cooled (FC) curves show that the blocking temperature of Fe3O4@1 was at 120 K. Studies of Fe3O4@1 removing cationic and anionic dyes from water have been explored. The characterization of Fe3O4@1, effects of critical factors such as dosage, the concentration of methylene blue (MB), pH, adsorption kinetics, isotherm, the removal selectivity of substrate and the reusability of Fe3O4@1 were assessed. The magnetic adsorbent displayed an outstanding removal activity for the cationic dye at a broad range of pH. The adsorption kinetics and isotherm models revealed that the adsorption process of Fe3O4@1 was mainly governed via chemisorption. The maximum capacity of Fe3O4@1 adsorbing substance was 41.91 mg g−1. Furthermore, Fe3O4@1 showed its high stability by remaining for seven runs of the adsorption-desorption process with an effective MB removal rate, and could also be developed as a valuable adsorbent for dyes elimination from aqueous system.
Highlights
With the development of world’s population and socioeconomics, fresh and clean water has become one of the major concerns of 21st century
Many researches have been implemented for the organic dyes removal, such as electrochemical oxidation, coagulation, adsorption, membrane filtration, biological schemes and photocatalytic degradation [6,7,8,9]
The adsorption behavior of Fe3 O4 @1 for organic dyes from aqueous solution was explored with methylene blue (MB) as a model substrate
Summary
With the development of world’s population and socioeconomics, fresh and clean water has become one of the major concerns of 21st century. The pollution caused by organic dyes has been a great menace to the water ecosystem and human health [4,5]. Many researches have been implemented for the organic dyes removal, such as electrochemical oxidation, coagulation, adsorption, membrane filtration, biological schemes and photocatalytic degradation [6,7,8,9]. Among these strategies, adsorption is recognized as a promising approach due to its operating environment, simple procedures and high efficiency [10]. Developing effective adsorbents to remove the pollutants from wastewater is of great concern to researchers
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