Adsorptive Removal of Rhodamine B Using Novel Adsorbent-Based Surfactant-Modified Alpha Alumina Nanoparticles

Abstract

The objective of the present study is to investigate removal of cationic dye, rhodamine B (RhB), in water environment using a high-performance absorbent based on metal oxide nanomaterials toward green chemistry. The adsorption of sodium dodecyl sulfate (SDS) onto synthesized alpha alumina (α-Al2O3) material (M0) at different ionic strengths under low pH was studied to fabricate a new adsorbent as SDS-modified α-Al2O3 material (M1). The RhB removal using M1 was much higher than M0 under the same experimental conditions. The optimal conditions for RhB removal using M1 were found to be contact time 30 min, pH 4, and adsorbent dosage 5 mg/mL. The maximum RhB removal using M1 achieved 100%, and adsorption amount reached 52.0 mg/g. Adsorption isotherms of RhB onto M1 were well fitted by the two-step adsorption model. The electrostatic attraction between positive RhB molecules and negatively charged M1 surface controlled the adsorption that was evaluated by the surface charge change with zeta potential and adsorption isotherms. Very high RhB removal of greater than 98% after four regenerations of M1 and the maximum removal for all actual textile wastewater samples demonstrate that SDS-modified nano α-Al2O3 is a high-performance and reusable material for RhB removal from wastewater.

A dual-functional catalyst: wood-templated BiVO4–CdS for wood dye wastewater

“… 1 As a wood coloring agent Rhodamine B (RhB) is widely applied when dyeing wood and producing paper. 2,3 RhB in wood dye wastewater can seriously irritate the nasal mucosa, eyes, and skin in humans if not treated in time. 4 Compare to some conventional effluent remediation methods like physical adsorption and membrane filtration treatment, photocatalytic technology exhibits higher efficiency.…”

Magnetic Biochar by One-Step Impregnation Pyrolysis of Peganum harmala L. for Removal of Rhodamine B

“…Among these catalysts are Ti/Ru 0.3 Ti 0.7 O 2 [3], iron-doped mesoporous silica [7], nanozero valent iron (nZVI)@biochar [8], and TiO 2 -AuNP/polydimethylsiloxane sponge [9], which were reported. RhB adsorbent materials include zinc ferrite-polyaniline [1], activated pine cone [10], stalk corn-activated carbon [11], Argemone mexicana [12], bentonite-titanium dioxide composites [13], graphene oxide/silicalite-1 composites [14], carbon xerogels [15], and modified alpha-alumina [16]. When biomass is heated to a point of thermal breakdown without oxygen, a material called biochar is created that is rich in carbon and has fine grains.…”

Adsorptive Removal of Anionic Azo Dye New Coccine Using Silica and Silica-gel with Surface Modification by Polycation

“…However, dye residue is a kind of pollutant for the aquatic environment [1], because many dyes are highly toxic with low biodegradation [2]. Different techniques have been investigated and further developed for treatment to remove dyes from aqueous solution [3,4], such as photocatalysis [5][6][7], advanced oxidation [8,9], flocculation and coagulation [10], biological processes [11], and adsorption [12][13][14][15]. For developing countries, adsorption is one of the most suitable and effective methods for dye removal when using low-cost adsorbents such as minerals, clays or agricultural subproducts [2,16,17].…”