Immobilized CeO₂ for adsorption of azo dye

Abstract

Azo dyes are not efficiently removed in water treatment. So the development of excellent absorbent is significant important for environmental protection. In this study, ceria is successfully immobilized on 40-60 mesh sand by using a simple method of sol-gel. And then research the effect of absorption on azo dyes in waster using immobilized CeO 2 (ICe). The ICe absorbent displays high removal efficiency for AB10 (one typical kind of azo dyes) in waste water. In addition, after absorbing, concentration and toxicity of azo dye decreased and the absorbent easily separation from water which indicates that the technique is a promising post-treatment process to improve water quality.

Biochar/α‐Fe2O3/γ‐Fe2O3 Heterjunction Composite for Photocatalytic Removal of Amino Black

“…[1,2] The removal of azo dye from wastewater is a long-term task, which has attracted widespread attention from chemists. [3][4][5][6] Several approaches have aimed to remove toxic azo dye in wastewater, including absorption, [7,8] biodegradation, [9][10][11][12] and chemical degradation. [13][14] Beyond that, the photodegradation method using metal oxides is useful for degrading organic dye into environmentally friendly products, [15] including TiO 2 , [16] ZnO, [17] CdS, [18] SnO, [19] Fe 2 O 3 [20] etc.…”

MnFe2O4@SiO2@CeO2 core–shell nanostructures for applications in water remediation

“…21 Cerium dioxide has also been explored as an adsorbent for small gaseous molecules, 22 toxic metal ions in composite materials 23 and for removal of azo dyes on immobilized surfaces. 24 In this work, cerium dioxide was deposited on the surface of silica coated magnetic nanoparticles forming new core-shell nanocomposites. The nanocomposite particles were characterized by various instrumental techniques and then they were tested for the methylene blue dye removal.…”

“… 21 Cerium dioxide has also been explored as an adsorbent for small gaseous molecules, 22 toxic metal ions in composite materials 23 and for removal of azo dyes on immobilized surfaces. 24 …”

TiO2/CdS composite photocathode improves the performance and degradation of wastewater in microbial fuel cells

“…In recent years, the production and use of printing and dyeing have been rapidly developed, resulting in a large amount of dye wastewater containing organic dyes. 1 , 2 , 3 It is well known that dye wastewater can seriously affect the local ecological environment, especially the healthy growth of aquatic organisms due to its wide variety, high concentration, complex organic components, poor bioavailability, strong toxicity and emissions. 4 Therefore, developing a low cost, high efficiency and reliable dye wastewater treatment technology has been particularly important for industrial dye wastewater degradation.…”