Year-end Sale % OFF 
Abstract
Catechol has strong toxicity and deformity as well as carcinogenicity, and it is difficult to degrade naturally. Therefore, it is of great practical significance to develop efficient adsorbents to separate catechol from water quickly and effectively. In this work, g-C3N4/Fe3O4 magnetic nanocomposites were prepared using g-C3N4 as the matrix by chemical co-precipitation, mixing with Fe2+ and Fe3+ solutions. Then, g-C3N4/Fe3O4 was used, for the first time, as an adsorbent to investigate the removal rate of catechol under different conditions by the magnetic field separation method. The adsorption parameters of the g-C3N4/Fe3O4 nanocomposite were evaluated by the Langmuir and Freundlich adsorption models. The results showed that the g-C3N4/Fe3O4 nanocomposite presented a two-step adsorption behavior and a considerably high adsorption capacity. The removal rate of catechol reached 70% at the dosage of 50 mg, adsorption time of 30 min, and pH value of 6. Five adsorption–desorption cycles demonstrated that the g-C3N4/Fe3O4 material had good stability and reusability.
Highlights
Catechol (1,2-dihydroxybenzene) is an important chemical product, which is used widely as the intermediate of fine chemicals such as pesticides, pharmaceuticals, and dyes
·KL) + Ce/Qm Qe is the equilibrium amount of catechol adsorbed; KL (L/mg) is a constant related to the intensity of adsorption; and Qm is where Ce is the concentration of catechol at equilibrium; Qe is the equilibrium amount the maximum amount adsorbed for a complete monolayer coverage
The results show that g-C3 N4 /Fe3 O4 takes a comparatively shorter time to reach the equilibrium than other adsorbents such as activated carbon, modified dolomite, hydroxyapatite, α-alumina, magnetic vermiculite, resin, and waste Fe(III)/Cr(III)
Summary
Catechol (1,2-dihydroxybenzene) is an important chemical product, which is used widely as the intermediate of fine chemicals such as pesticides, pharmaceuticals, and dyes. TiO2 [20], α-alumina [21], magnetic vermiculite [22], resin [23], and waste Fe(III)/Cr(III) hydroxide [24] These aforementioned materials were modified to increase the pore structure, specific surface area, or special functional groups, thereby enhancing their adsorption effect. Fe3 O4 onto C3 N4 has good stability, large surface area, and good water solubility It can hopefully be used as a solid phase extraction adsorbent, separating the target objects from solutions quickly by an external magnetic field. Wang et al [28] successfully prepared g-C3 N4 /Fe3 O4 nanocomposites by chemical co-precipitation, which was used as a solid phase extraction adsorbent for the first time to separate and enrich polycyclic aromatic hydrocarbons (PAHs) in environmental water. The stability and reusability of the composites were evaluated by adsorption–desorption cycle experiments
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
