Preparation of Biomass Activated Carbon Supported Nanoscale Zero-Valent Iron (Nzvi) and Its Application in Decolorization of Methyl Orange from Aqueous Solution

Abstract

The nanoscale zero-valent iron (nZVI) has great potential to degrade organic polluted wastewater. In this study, the nZVI particles were obtained by the pulse electrodeposition and were loaded on the biomass activated carbon (BC) for synthesizing the composite material of BC-nZVI. The composite material was characterized by SEM-EDS and XRD and was also used for the decolorization of methyl orange (MO) test. The results showed that the 97.94% removal percentage demonstrated its promise in the remediation of dye wastewater for 60 min. The rate of MO matched well with the pseudo-second-order model, and the rate-limiting step may be a chemical sorption between the MO and BC-nZVI. The removal percentage of MO can be effectively improved with higher temperature, larger BC-nZVI dosage, and lower initial concentration of MO at the pH of 7 condition.

Green Synthesis of an Activated Carbon-Supported Ag and ZnO Nanocomposite for Photocatalytic Degradation and Its Antibacterial Activities

“…Activated carbon with antibacterial activity can be produced by impregnation of silver nanoparticles [2][3][4][5][6], or metallic oxides such as ZnO [7]. Furthermore, silver and ZnO nanoparticles supported on activated carbon have gained much attention for adsorption [6,[8][9][10][11][12][13][14][15][16], and catalytic applications [7,[17][18][19][20][21][22].…”

Nanoscale Zero Valent Iron Supported by Biomass-Activated Carbon for Highly Efficient Total Chromium Removal from Electroplating Wastewater

“…Here, it should be noticed that the Cr in the wastewater could be easily contacted with the nZVI particles that were distributed on the surface of BC. Significantly, the PSO equation matched more with the data than the PFO equation, indicating that the chemical adsorption in this process was the main rate-limiting step of total Cr removal by BC-nZVI [24]. Therefore, it could be concluded from kinetic parameters that adsorption, co-precipitation, and reduction occurred during the Cr(VI) removal process by BC-nZVI.…”

“…The total Fe concentration in the emulsion was 30 g/L, and the amount of oxidized Fe was less than 10%. The detailed preparation process of the nZVI emulsion can be found in our previous work [24]. BC was supplied by Xinhong Co. Ltd., Xuzhou, China, which was carbonized from coconut shell at 340 • C with a particle size of 2-4 mm.…”

Color and COD Removal from Real Textile Wastewater using Nanoscale Zero-Value Iron (nZVI)

“…In this case, they can speed up the corrosion of nanoparticle, and remove iron (II) hydroxide from the nanoparticle surface to create fresh active sites. At alkaline pH values, hydroxly ions will remarkably increase the generation of the iron hydroxide on the nZVI surface and dye removal efficiency will decrease [27,[40][41][42]. Furthermore, low removal efficiency of dye was observed at an extremely acidic (pH: 2) condition, possibly due to the rapid dissolution of the nZVI particles in bulk solution [40].…”