Metribuzin removal with electro-activated granular carbon

Kitous, O.; Hamadou, Hanane; Lounici, H.; Drouiche, Nadjib; Mameri, N.

doi:10.1016/j.cep.2012.02.005

Cited by 14 publications

(4 citation statements)

References 16 publications

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“…A final application of electrolytic systems is to modify the adsorption capacity of an adsorbent or ion exchange processes of a resine using electrochemically assisted processes. Very promising results have been obtained using these technologies.…”

Section: Use Of Electrochemical Technologies For Pesticide Removal Fr...mentioning

confidence: 99%

“…165 Although this cathodic process is not a final treatment, a very significant decrease in the toxicity of chlorinated pesticides is obtained, and the cathodic process may be a good alternative when combined with cheaper treatments. 166,167 A final application of electrolytic systems is to modify the adsorption capacity 168 of an adsorbent or ion exchange processes 169 of a resine using electrochemically assisted processes. Very promising results have been obtained using these technologies.…”

Section: Anodic Oxidation and Cathodic Dechlorinationmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemically Assisted Remediation of Pesticides in Soils and Water: A Review

Rodrigo

Oturan²,

Oturan³

2014

Chem. Rev.

457

278

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Section: Use Of Electrochemical Technologies For Pesticide Removal Fr...mentioning

confidence: 99%

Section: Anodic Oxidation and Cathodic Dechlorinationmentioning

confidence: 99%

Electrochemically Assisted Remediation of Pesticides in Soils and Water: A Review

Rodrigo

Oturan²,

Oturan³

2014

Chem. Rev.

457

278

View full text Add to dashboard Cite

“…Its toxicity over fishes has been documented, promoting loses of weight and total body length with inhibition of specific growth rate [30]. Several authors have described the decay of MTZ concentration and, in some cases, the detection of heteroaromatic by-products resulting from: (i) adsorption with granular activated carbon [31] and fungal biomass [32], (ii) ozonation [33], (iii) chlorination [34], (iv) photolysis with UVC light [35], (v) electrocoagulation with Fe anode under UVC radiation [36] and (vi) heterogeneous photocatalysis with ZnO under sunlight [37] and with TiO2 under UVA light [38] or simulated sunlight [39]. The latter work also reported that only 80% of total organic carbon (TOC) was reduced after 300 min of photocatalytic treatment of a suspension with 10 mg L -1 MTZ and 100 mg TiO2, with irradiance of 750 W m -2 .…”

Section: Introductionmentioning

confidence: 99%

Ensuring the overall combustion of herbicide metribuzin by electrochemical advanced oxidation processes. Study of operation variables, kinetics and degradation routes

Guelfi

Gozzi

et al. 2019

Separation and Purification Technology

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This article reports the electrochemical degradation of the herbicide metribuzin (MTZ) in sulfate medium by advanced oxidation processes like anodic oxidation with electrogenerated H2O2 (AO-H2O2), electro-Fenton (EF) and UVA photoelectro-Fenton (PEF). A boron-doped diamond (BDD) anode was combined with an air-diffusion cathode with ability to produce H2O2. Unprecedented overall combustion was feasible by all methods at a constant current density (j) ≥ 100.0 mA cm -2 . The total organic carbon (TOC) removal achieved by AO-H2O2 was independent from pH within the range 3.0-9.0, whereas the oscillatory dependence of the pseudo-first-order MTZ decay rate constant with this variable was ascribed to adsorption on the BDD surface. In EF and PEF at pH 3.0, 0.50 mM Fe 2+ was determined as optimum catalyst content and the MTZ removal showed two consecutive pseudo-first-order kinetic stages. These were related to the fast reaction of the target molecule with • OH formed from Fenton's reaction, followed by a slower attack of physisorbed BDD( • OH) onto Fe(III)-MTZ complexes. The effect of j and MTZ content on decay kinetics and TOC removal was examined. PEF was the best treatment due to the decomposition of photoactive intermediates by UVA radiation, yielding total mineralization of a 0.523 mM herbicide solution after 420 min of electrolysis at 100.0 mA cm -2 . A thorough reaction pathway for MTZ degradation is proposed from the sixteen heteroaromatic by-products and three aliphatic molecules identified by GC-MS and LC-MS/MS. Oxalic and oxamic acids were detected as final carboxylic acids by ion-exclusion HPLC.

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“…Langmuir-Freundlich isotherms also used to model the system at various constant pH values. The adsorption of the pesticide metribuzin by electro-activated granular carbon was investigated byKitous et al (2012). The effects of electrochemical potential, initial metribuzin to granular activated carbon (GAC) concentration ratio and ionic strength of the solution were evaluated.…”

mentioning

confidence: 99%