Optimal Decolorization Efficiency of Indigo Carmine by TiO2/UV Photocatalytic Process Coupled with Response Surface Methodology

Abaamrane, Abdelhadi; Qourzal, Samir; Barka, Noureddine; Billah, S. Mançour; Assabbane, Ali; Ait‐Ichou, Y.

doi:10.13005/ojc/280302

Cited by 18 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By comparing the results in Figure 8 a with those in Figure 8 b,c, we observed that an extreme initial concentration of 3000 mg·dm −3 exhibited the slowest degradation rate independent of the composite and temperature. Despite the large differences in the initial concentrations used by us and other authors [ 31 , 36 , 37 ], the effect was similar. The kinetic curves in Figure 8 a obeyed a second order rate equation, and the rate constants were 0.5 × 10 −2 for MT-G5 at 25 °C and 1.5 × 10 −2 g·mg −1 ·h −1 for MT-G50 at 50 °C.…”

Section: Resultssupporting

confidence: 67%

“…In addition, we decided to optimize the photodegradation of IC using the prepared TiO 2 /carbon materials. Abaamrane et al reported on the optimal decolorization of IC using TiO 2 /UV and the response surface methodology [ 37 ]. In the current work, we used the Taguchi method [ 38 ] for the evaluation of the color removal produced by IC through a small number of trials.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

TiO2 Immobilized on Manihot Carbon: Optimal Preparation and Evaluation of Its Activity in the Decomposition of Indigo Carmine

Antonio-Cisneros

Dávila-Jiménez

Elizalde-González³

et al. 2015

IJMS

View full text Add to dashboard Cite

Applications of carbon-TiO2 materials have attracted attention in nanotechnology due to their synergic effects. We report the immobilization of TiO2 on carbon prepared from residues of the plant Manihot, commercial TiO2 and glycerol. The objective was to obtain a moderate loading of the anatase phase by preserving the carbonaceous external surface and micropores of the composite. Two preparation methods were compared, including mixing dry precursors and immobilization using a glycerol slurry. The evaluation of the micropore blocking was performed using nitrogen adsorption isotherms. The results indicated that it was possible to use Manihot residues and glycerol to prepare an anatase-containing material with a basic surface and a significant SBET value. The activities of the prepared materials were tested in a decomposition assay of indigo carmine. The TiO2/carbon eliminated nearly 100% of the dye under UV irradiation using the optimal conditions found by a Taguchi L4 orthogonal array considering the specific surface, temperature and initial concentration. The reaction was monitored by UV-Vis spectrophotometry and LC-ESI-(Qq)-TOF-MS, enabling the identification of some intermediates. No isatin-5-sulfonic acid was detected after a 60 min photocatalytic reaction, and three sulfonated aromatic amines, including 4-amino-3-hydroxybenzenesulfonic acid, 2-(2-amino-5-sulfophenyl)-2-oxoacetic acid and 2-amino-5-sulfobenzoic acid, were present in the reaction mixture.

show abstract

Section: Resultssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

TiO2 Immobilized on Manihot Carbon: Optimal Preparation and Evaluation of Its Activity in the Decomposition of Indigo Carmine

Antonio-Cisneros

Dávila-Jiménez

Elizalde-González³

et al. 2015

IJMS

View full text Add to dashboard Cite

show abstract

“…From an environmental point of view, the remediation of wastewater is a great challenge and has attracted tremendous attention in recent years. Different methods have been used for dye removal from wastewaters such as biological degradation [7], photodegradation [8], coagulation [9], membrane filtration [10], reverse osmosis [11], adsorption [12], or the synergic treatment using different methods. Among these methods, the adsorption process is one of the most effective techniques that has been successfully employed for colour removal because it is considered to be less expensive, more efficient and less likely to generate secondary waste [13].…”

Section: Introductionmentioning

confidence: 99%

Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties

Mahjoubi¹,

Khalidi

Abdennouri³

et al. 2017

Journal of Taibah University for Science

Self Cite

210

109

View full text Add to dashboard Cite

In this work, Zn-Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions were synthesised via a co-precipitation method at a constant solution pH. The as-synthesised samples were characterised by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and simultaneous thermogravimetric/differential thermal analysis (TGA-DTA). The XRD patterns showed that Zn-Al-SO 4 had the greatest interlayer spacing, followed by Zn-Al-Cl, Zn-Al-NO 3 and Zn-Al-CO 3 . The FTIR spectra clearly confirmed the presence of intercalated anions in the structure of the LDHs. Batch experiments for methyl orange (MO) adsorption onto synthesised samples were investigated under various conditions such as contact time, initial dye concentration and solution pH. The experimental results show that pH is the most influencing factor. The effective pH range for the MO removal was found to be 3.5-4.5. The kinetics data can be described accurately by a pseudo-second-order kinetic model instead of a pseudo-first-order model. The equilibrium data were analysed using the Langmuir, Freundlich and Dubinin-Radushkevich models. The results showed that the Langmuir and Dubinin-Radushkevich isotherm models fit well to the experimental data. The Zn-Al-LDH samples exhibited exceptional Langmuir maximum adsorption capacities of 2758, 2455, 2270 and 1684 mg/g for Zn-Al-SO 4 , Zn-Al-Cl, Zn-Al-NO 3 and Zn-Al-CO 3 , respectively.

show abstract

“…In a full factorial experiment, both of the (−1) and (+1) levels of every factor are compared with each other and the effects of each of the factor levels on the response are investigated according to the levels of other factors. Doing so with the factorial planning of the experiments, it was possible to investigate simultaneously the effect of all the variables [19][20][21][22].…”

Section: Canadian Chemical Transactionsmentioning

confidence: 99%

Factorial Experimental Design for the Optimization of β-Naphthol Photocatalytic Degradation in TiO2 Aqueous Suspension

2014

Can Chem Trans

View full text Add to dashboard Cite

A factorial experimental design was developed to describe the photocatalytic degradation of β-naphthol in a circulating photo-reactor using TiO 2 aqueous suspension. The main and interaction factors studied were the initial concentration of β-naphthol, TiO 2 dosage, pH and circulation flow. The parameters coded as X 1 , X 2 , X 3 and X 4 , consecutively, and were investigated at two levels (−1 and +1). The effects of individual variables and their interaction effects for dependent variables, namely, photocatalytic degradation efficiency (%) were determined. The experimental results and statistical analysis show that increasing in the initial concentration of β-naphthol decreases the photocatalytic degradation efficiency whereas the increase of TiO 2 dosage, pH and the circulation flow have a positive effect on the photocatalytic degradation. The interaction between TiO 2 dosage and circulation flow was the most influencing interaction. However, the interaction between TiO 2 dosage and pH was the least influencing interactions. The variance analysis (ANOVA) was applied and the statistic data showed adequate model.

show abstract

Optimal Decolorization Efficiency of Indigo Carmine by TiO2/UV Photocatalytic Process Coupled with Response Surface Methodology

Cited by 18 publications

References 15 publications

TiO2 Immobilized on Manihot Carbon: Optimal Preparation and Evaluation of Its Activity in the Decomposition of Indigo Carmine

TiO2 Immobilized on Manihot Carbon: Optimal Preparation and Evaluation of Its Activity in the Decomposition of Indigo Carmine

Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties

Factorial Experimental Design for the Optimization of β-Naphthol Photocatalytic Degradation in TiO2 Aqueous Suspension

Contact Info

Product

Resources

About