Efficient Sol-gel Nanocomposite TiO2-clay in Photodegradation of Phenol: Comparison to Labe-made and Commercial Photocatalysts

Gaidoumi, Abdelali El; Arrahli, Abdellah; Loqman, Amal; Baragh, Fidâ; Bali, Brahim El; Kherbeche, Abdelhak

doi:10.1007/s12633-021-01275-1

Cited by 13 publications

(1 citation statement)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The biotransformation products of organic molecules, such as dyes, adversely affect human health because of their toxicity and carcinogenic and mutagenic effects even if they are present in trace amounts [9, 10]. A variety of technologies are available for removing synthetic dyes from water and wastewater to reduce their environmental impacts, such as sedimentation, filtration technology, oxidation, membrane isolation, electrocoagulation, advanced activated process, biodegradation, adsorption, and ion exchange [11, 12]. To remove these toxic materials from effluent streams, adsorption technology remains the best choice because of its simplicity and cost-effectiveness [13].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Basic Fuchsin from Synthetic Medical Wastewater and Competitive Adsorption in the Mixture

Ahmed

Salihi

Kaufhold

et al. 2023

Adsorption Science & Technology

View full text Add to dashboard Cite

The Ziehl-Neelsen stain is a mixture of Basic Fuchsin (BF), phenol (Ph), and methylene blue. It is used to stain the cell walls of Mycobacterium species. In this study, Basic Fuchsin was efficiently removed from synthetic wastewater using natural clay of Gankawa (GC) from Sulaimanyah city, and the effect of the presence of high concentrations of phenol in the adsorption mixture is demonstrated. In addition, X-ray diffraction (XRD), X-ray fluorescence (XRF), N2 gas adsorption analyzer, and field-emission scanning electron microscopy (FESEM) were used to characterize the natural clay. The clay was found to be mostly calcite, with a minor percentage of smectite, and contaminated with low percentages of illite. The adsorption kinetics show a relatively fast equilibration time (60-70 minutes). A second-order pseudokinetic model better fits the experimental kinetic data. The effect of the initial pH of the solution mixture was negligible at the experimental concentration range of the study. Freundlich and Langmuir’s adsorption isotherm models were applied to the equilibrium experimental data using nonlinear regression curve fitting. Both kinetics and isotherm studies point to a chemical adsorption mechanism for the process. For adsorption in the mixture, phenol molecules were found to compete with BF molecules for the active adsorption sites, while a synergetic effect of BF exists on phenol adsorption. As a naturally abundant cheap material, GC shows a superior adsorption capacity toward BF (287.0 mg g-1) over all natural materials and most of the synthetic or modified materials found in the literature.

show abstract