Synthesis, characterization and potential application of magnetized nanoparticles for photocatalysis of Levafix CA reactive azo‐dye in aqueous effluent

Abstract

Dyes represent major environmental concerns since their presence in aqueous effluents posed a threat to the ecological system. This work is focused on developing a sustainable photo-Fenton strategy for efficient Levafix Blue oxidation. Nanostructured magnetite as the precursor of the oxidation technique has been synthesized via a simple co-precipitation technique. Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) were applied to characterize the samples.The experimental dye removal data revealed that almost complete dye removal (99.9%) was attained at pH 3.0 using 800 and 40 mg/L of H 2 O 2 and magnetite reagents, respectively within 30-min of irradiation time. The process follows the first-order reaction model with endothermic and non-spontaneous oxidation reaction in nature with a low activation energy barrier of 14.29 kJ/mol. Finally, the experimental data reveals that magnetite could be easily recovered and recycled up to six treatment cycles with a removal efficiency of 71% confirms the process sustainability.

Construction of a hetero-junction recyclable composite photocatalyst from aluminum-based waste/magnetite for efficient carbamate insecticide oxidation

“…Besides, more carbamate loads on the active sites of the alum sludge/magnetite nanoparticles may result in a reduction in the amount of effective ˙OH radicals. Thabet et al 52 and Tahoon et al 53 recorded a similar trend in oxidizing reactive dye and Tony MA, Lin L.-S. 54 in treating polymer loaded organic wastewater effluents by a Fenton reaction besides Malakootian et al 55 in treating ciprofloxacin and Nozari et al 56 in the removal of dibutyl phthalate from aqueous media.…”

Compendium data and preliminary results based on alum sludge and gravel continuous fixed-packed-bed column substrate as sustainable practice for constructed wetland development in northern Egypt

“…Thus, alum sludge cake own a good potential to be a good substrate in the CWs medium in order to endowing a double benefits of pleasant reeds and wastewater treatment. Various investigations are applied to evaluate the affinity of AS as an efficient adsorbent material for dyes [28,29], phosphorous [27] and some of heavy metals adsorption [30][31][32] for introducing it as a filter bed or constructed wetland medium. The application of dewatered AS (cake) as the main CWs substrate to expand its scope for enhanced wastewater treatment facility is interesting as a new material substrates for CWs advancement.…”

“…This is due to the loss in the adsorption capacity due to the decline of the active sites of alum sludge adsorbent material. Moreover, increasing the solution's pH weakening the attraction between the adsorbate and the alum sludge adsorbent substance [19,29,43,44]. Fig.…”

Multivariate-Parameters Effect of Dewatered Aluminium-Based Sludge in Catalytic Oxidation into Wastewater Treatment with A Special Strategy for Solar Energy Application

“…Recently, several AOP (Ozonation, Fenton and Photo Fenton processes etc.) have been developed for the treatment of dyes in wastewater effluent [19][20][21]. Although the Fenton and Fentonlike processes are less affordable and do not create harmful by-products when compared to other AOPs, most Fenton-like processes documented in the literature have been shown to be efficient at acidic pH levels [18].…”