Treatment of Diluted Solutions of Methylene Blue by Adsorption Coupled with Electrochemical Regeneration: A Comparative Study of Three Adsorbants

Bouaziz, I.; Hamza, Morched; Abdelhédi, Ridha; Savall, A.; Serrano, Karine Groenen

doi:10.1149/05901.0495ecst

Cited by 2 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption isotherm of phenol on activated carbon exhibits a type of shape L showing that there is a strong affinity between the sorbent material and the phenol [42]. Although the micropore volume of activated carbon used is in the range of 0.37 cm 3 /g [32], the pore size being of the order of those of phenol molecules, so there is no possibility to form additional layers. The isotherm adsorption of phenol on sawdust is slightly different because no stabilization is reached in the concentration range studied.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…In a preliminary work, the adsorption capacity of methylene blue has been compared for this highly conductive carbon-based adsorbent, sawdust and activated carbon. As a result, the adsorption capacity of Nyex was 75 and 1000 times less than sawdust and activated carbon respectively [32]. Consequently only sawdust and activated carbon were selected for this study.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New hybrid process combining adsorption on sawdust and electroxidation using a BDD anode for the treatment of dilute wastewater

Bouaziz

Hamza

Sellami

et al. 2017

Separation and Purification Technology

View full text Add to dashboard Cite

A new hybrid process that integrates adsorption on sawdust and electrochemical oxidation on a boron doped diamond anode was investigated for the treatment of dilute solutions containing phenol. In such combined process the pollutant is adsorbed until saturation and electrochemical oxidation has been used for both the regeneration of adsorbant and the pollutant removal. Phenol is used as model of pollutant and the efficiency of the regeneration of loaded sawdust has been compared with that of activated carbon (AC), a widely used adsorbent due to its high adsorption capacity which results from its high porosity. The study highlights the effect of electrolysis in the increase of the phenol desorption during the treatment of adsorbents. The regeneration efficiency of AC after 1 cycle of adsorption and regeneration is only 59% due to the electropolymerisation of the strongly adsorbed phenol. By contrast, the electrochemical regeneration of sawdust led to increase the adsorption capacity multiple adsorption and electrochemical regeneration cycles led to an enhancement of adsorption capacity of the sawdust with a complete removal of phenol and the possible reuse of the electrolysis solution.

show abstract

Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New hybrid process combining adsorption on sawdust and electroxidation using a BDD anode for the treatment of dilute wastewater

Bouaziz

Hamza

Sellami

et al. 2017

Separation and Purification Technology

View full text Add to dashboard Cite

show abstract

Depollution of 1,3,5-trimethoxybenzene through its electrochemical conversion into a high added value product 2,6-dimethoxy-1,4-benzoquinone

Hamza

Bouaziz

Njah

et al. 2017

Euro-Mediterr J Environ Integr

Self Cite

View full text Add to dashboard Cite

The first part of this work relates to the analytical study of the electrochemical behavior of 1,3,5-trimethoxybenzene (TMB) by cyclic voltammetry at treated gold electrode. The second part is relative to the results of its conversion into a high added value product 2,6-dimethoxy-1,4-benzoquinone (DMBQ) by electrolysis at lead dioxide anode. The used electrolyte which is a simulated solution of TMB in water-acetone mixture should be prepared using a preconcentrated TMB wastewater. The partial substitution of water by acetone permit to control the TMB solubility to avoid the electrochemical efficiency reduction by TMB transfer limitation. Moreover, the DMBQ desorption from the electrode surface by the effects of acetone and its displacement by TMB provides the slowdown of its degradation. The electrochemical DMBQ recovery increases with the enhancement of acetone volumic percentage and decreases by increasing the current density.

show abstract

Treatment of Diluted Solutions of Methylene Blue by Adsorption Coupled with Electrochemical Regeneration: A Comparative Study of Three Adsorbants

Cited by 2 publications

References 7 publications

New hybrid process combining adsorption on sawdust and electroxidation using a BDD anode for the treatment of dilute wastewater

New hybrid process combining adsorption on sawdust and electroxidation using a BDD anode for the treatment of dilute wastewater

Depollution of 1,3,5-trimethoxybenzene through its electrochemical conversion into a high added value product 2,6-dimethoxy-1,4-benzoquinone

Contact Info

Product

Resources

About