Adsorptive removal of reactive dyes from aqueous solutions using zinc oxide nanoparticles

Abstract

In this work, zinc oxide nanoparticles (ZnO NPs) prepared by the precipitation method were employed as a potential adsorbent for the removal of Acid Black 210 (AB210) and Reactive Blue 19 (RB19) dyes from aqueous solutions. The prepared ZnO NPs were characterized using X‐ray diffraction, transmission electron microscopy, scanning electron microscopy, and N2 adsorption/desorption methods. Various parameters affecting the removal efficiency, such as solution pH, shaking time, adsorbent amount, and the dye concentration, were studied and optimized. The experimental data were analyzed by different kinetic and isothermal models. This study suggests ZnO NPs as an effective adsorbent for the removal of the dyes from polluted water.

Solvent-Free Synthesized Monolithic Ultraporous Aluminas for Highly Efficient Removal of Remazol Brilliant Blue R: Equilibrium, Kinetic, and Thermodynamic Studies

“…All the above discussions indicated that the UPA(θ) dosage played an important role in the adsorption process; however, the economic issues usually should be taken into consideration in the actual adsorbent applications. Therefore, in order to obtain suitable dye treatment, one should determine the appropriate UPA(θ) dosage according to the initial concentration of dye effluents [ 6 , 7 , 49 , 50 ].…”

“…Compared with the other organic, inorganic, or bio-based adsorbents reported in related studies in the literature ( Table 5 ), UPA(θ) and UPA(γ) powders possess several advantages for large-scale applications including nontoxicity, facile synthesis, and higher RBBR adsorption capacity, compared with referenced adsorbents [ 4 , 5 , 6 , 7 , 13 , 45 , 46 , 47 , 49 , 50 , 57 , 58 , 59 , 60 , 61 ]. Therefore, UPA materials have high potentials as alternative adsorbents for the practical treatment of dye effluents.…”

Polypyrrole-Chitosan-CaFe2O4 Layer Sensor for Detection of Anionic and Cationic Dye Using Surface Plasmon Resonance

“…These techniques have limitations, however, in terms of achieving complete degradation of the dyes in wastewater or environmental areas. Therefore, a lot of materials have been used to treat wastewater including zeolite, clay, and carbon-based sorbents [15]. The nanomaterials have unique chemical and physical properties including high photocatalytic activity and nontoxicity [15].…”

“…Therefore, a lot of materials have been used to treat wastewater including zeolite, clay, and carbon-based sorbents [15]. The nanomaterials have unique chemical and physical properties including high photocatalytic activity and nontoxicity [15]. Hence, nanoparticles were used to enhance the physical, biological, and chemical properties of absorbance composites and methods for degradation and decolorization of wastewater [16].…”

“…These nanoparticles tend to aggregate, and they can decrease the activity [16,17] of dyes. Silver [18], gold [19], nickel [20], iron [21], and zinc oxide [15] nanoparticles were the conventional nanoparticles used to degrade and treat the environment and wastewater. Therefore, the investigation of nanoparticles is thus a significant topic to examine to detect and degrade dye materials such as MO and MB.…”