Application of a new sandwich of granular activated and fiber carbon as cathode in the electrochemical advanced oxidation treatment of pharmaceutical effluents

Bocos, Elvira; Alfaya, Elena; Iglesias, Olalla; Pazos, Marta

doi:10.1016/j.seppur.2015.07.048

Cited by 34 publications

(11 citation statements)

References 39 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other mechanisms responsible for the adsorption of chloramphenicol can be the n-interactions between the benzene rings of chloramphenicol (electron acceptor) and carbonyl groups on the surface of activated carbon (electron donors) and the π-π interactions between π electrons of activated carbons and π electrons in the aromatic ring of chloramphenicol [51,54,58]. Similar trends in the effect of the pH were obtained by other researchers [36,37,53,59].…”

Section: Impact Of Process Conditionssupporting

confidence: 70%

Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons

Lach

2019

Water

View full text Add to dashboard Cite

The aim of the study was to evaluate the possibility of applying commercial activated carbons currently used in water treatment plants and modified carbon at 400 and 800 °C in the atmosphere of air, water vapour and carbon dioxide to remove chloramphenicol. Adsorption kinetics was examined for solutions with pH of 2–10. Adsorption kinetics were determined for the initial concentration of chloramphenicol of 161 mg/dm3 and the adsorption isotherm was determined for the concentrations of 161 to 1615 mg/dm3. Of the analysed activated carbons (F-300, F-100, WG-12, ROW 08 Supra and Picabiol), the highest adsorption capacity was obtained for the use of Picabiol (214 mg/g), characterized by the highest specific surface area and pore volume. The pH value of the solution has little effect on the adsorption of chloramphenicol (the highest adsorption was found for pH = 10, qm = 190 mg/g, whereas the lowest—for pH = 6, qm = 208 mg/g). Modification of activated carbon WG-12 at 800 °C caused an increase in adsorption capacity from 195 mg/g (unmodified carbon) to 343 mg/g. A high correlation coefficient was found between the capacity of activated carbons and the total volume of micropores and mesopores. Among the examined adsorption kinetics equations (pseudo-first order, pseudo-second order, Elovich, intraparticle diffusion), the lowest values of the R2 correlation coefficient were obtained for the pseudo-first order equation. Other models with high correlation coefficient values described the adsorption kinetics. The adsorption results were modelled by means of the Freundlich, Langmuir, Temkin and Dubibin–Radushkevich adsorption isotherms. For all activated carbons and process conditions, the best match to the test results was obtained using the Langmuir model, whereas the lowest was found for the Dubibin–Radushkevich model.

show abstract

Section: Impact Of Process Conditionssupporting

confidence: 70%

Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons

Lach

2019

Water

View full text Add to dashboard Cite

show abstract

“…Given the potential toxicity of some of these pollutants and their metabolites, even at low concentrations [2], it seems interesting to tailor old methods and indices and create new ones, combining the analysis of the parameters mentioned above (Table 2), which are commonly and easily analysed, with many others like heavy metals, nitrates or pesticides, commonly present in water, identifying possible synergies regarding their effect on ecosystems and living beings.…”

Section: Discussionmentioning

confidence: 99%

“…Industrial pollution, agriculture activities and increasing citizen demands are some of the major factors responsible for the water deterioration. Many researchers have focused their efforts on the development of environmentally friendly and powerful treatments that can completely degrade persistent and organic contaminants [1,2]. Meanwhile, authorities are already implementing measures in order to stop the entrance of contaminants on water bodies.…”

Section: Introductionmentioning

confidence: 99%

2008–2017 Bogota River Water Quality Assessment Based on the Water Quality Index

et al. 2019

Self Cite

View full text Add to dashboard Cite

This article provides a deep analysis of the water quality at the upper basin of the Bogota River (Colombia) between 2008 and 2017. The Water Quality Index has been the indicator employed to determine the ecological status of the river. This index was chosen in order to normalize the analysis, given that it is commonly used by the Institute of Hydrology, Meteorology and Environmental Studies, a government agency of the Ministry of Environment and Sustainable Development of Colombia, to determine the state of surface effluents. The results obtained were organized in a double-entry matrix in order to relate the variables of the sample period and the sampling station. The research revealed an insufficient quality of water, demonstrating that the high stretch of the Bogota River basin has, in general, regular or acceptable water quality, while only five stations showed an acceptable status. Surprisingly, the stations located close to the wastewater treatment plants of the municipalities of Choconta, Suesca, Gachancipa, and Tocancipa, as well as Rio Negro, have a poor water quality, discharging a high load of contaminants into the river. Although great efforts have been made by Colombian authorities to restore the critical state of the majority of their aquatic ecosystems, recent implementation of policies and instruments have not shown significant achievements yet. For this reason, this study aims to present a powerful decision-tool for the monitoring and evaluation of correction measures implemented on this river basin. The data used in this research were provided by the Regional Autonomous Corporation of Cundinamarca.

show abstract

“…In recent years, carbon materials (graphite, carbon black, activated carbon, etc.) are often used as a cathode to catalyze O 2 reduction reactions because of their cheap and stable characteristics [13][14][15][16][17][18] . Nano-graphite, as a new carbon nanomaterial, has excellent physical and chemical properties, for example, it has good thermal stability and conductivity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Pd/CeOx/Nano-graphite composite cathode for electro-catalytic degradation of phenol

Zhang

et al. 2021

ACE

View full text Add to dashboard Cite

To improve the cathode electro-catalytic degradation performance of electrochemical advanced oxidation processes (EAOP), Pd metal and CeOx co-modified Nano-graphite (Pd/CeOx/Nano-G) composite was synthesized by chemical precipitation and reduction methods, and Pd/CeOx/Nano-G cathode was prepared by a hot-pressing method. The as-prepared composite and electrode were characterized by X-ray photoelectron spectroscopy, X-ray diffraction and scanning electrons microscopy. Results revealed that the mix-crystal structural CeOx (Ce2O3 and CeO2) and Pd0 metal were formed. The cathode was applied for the electro-catalytic degradation of phenol wastewater. The degradation efficiency of phenol by Pd1.0/CeOx5.0/Nano-G cathode reached 99.6% within 120 min degradation, which were higher than that of CeOx5.0/Nano-G and Nano-G cathodes. Both of the Pd metal and CeOx could improve the O2 reduction to H2O2 and promote the H2O2 dissociation to •OH for phenol oxidation. Additionally, the effects of electro-catalytic reaction parameters on the phenol degradation were investigated. The results indicated that Pd/CeOx/Nano-G cathode would have promise for further practical application in organic wastewater treatment.

show abstract

Application of a new sandwich of granular activated and fiber carbon as cathode in the electrochemical advanced oxidation treatment of pharmaceutical effluents

Cited by 34 publications

References 39 publications

Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons

Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons

2008–2017 Bogota River Water Quality Assessment Based on the Water Quality Index

Synthesis of Pd/CeOx/Nano-graphite composite cathode for electro-catalytic degradation of phenol

Contact Info

Product

Resources

About