Adsorption of Congo Red on Nano MgO Particles Prepared by Molten Salt Method

Abstract

Nano-substances show many surface properties due to their high activity and high surface area. This study concentrates on the possibility of using nano-MgO (NMO) for removing Congo red (CR) dye from wastewater. The effects of equilibrium time, pH, dye concentration and temperature have been investigated. Isotherm studies revealed the favorability of the adsorption process and the energy of adsorption (10.38<E<11.60 kJ/mol) suggest a mechanism controlled by chemical processes. The overall process was spontaneous and endothermic in nature with a maximum adsorption capacity of 1100 mg/g at 40 o C as estimated from Langmuir isotherm. The adsorption kinetics was found to follow pseudo second-order rate equations.

Performance Evaluation of Photovoltaic Thermal using MgO Nanofluid

“…which they can be constituted in a cubic phase of MgO according to JPCDS card no. 45-0946 at 2θ = 37.02°, 43.02°, 58.72°, 76.78°, and 78.73° correspond to the plane (111), ( 200), ( 220), ( 311) and (222) [24,25]. No additional peaks were present in the XRD pattern indicated that the sample is highly pure, with no detectable impurities or additional phases.…”

“…The FESEM images captured with this instrument were utilized to examine the morphology, assess agglomeration, and measure the particle size of the MgO nanoparticles in the magnification of 25kX and 100kX. Meanwhile, the XRD analysis conducted on PANalytical XPert PRO operating at Cu K radiation (λ = 1.5406 Å) in the 2θ range of 10-80 degrees, with a scanning step of 0.05 degrees and a scan speed of 5 degrees per minute as referred to Bdewi et al, [24]. XRD analysis was utilized to validate the purchased MgO nanoparticles, assess their purity, and determine particle size by identifying crystal structures and analyzing diffraction peaks.…”