Caracterización del proceso de adsorción de 3-cloro fenol desde solución acuosa sobre carbon activado por calorimetria de inmersión

Giraldo, Liliana; Moreno, Juan Carlos

doi:10.1590/s0100-40422009000700018

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…As basic groups are not present in ACC‐H 3 PO 4 samples and the ionic interactions can be considered practically negligible, the phenol adsorption is increased for these samples. For the other modified ACC samples that contain basic groups, the different ACC surface charges (negative or even neutral as pH is higher than PZC) will affect the dispersion forces and electron donor–acceptor interactions which are responsible for adsorption …”

Section: Resultsmentioning

confidence: 99%

Chemical surface modified‐activated carbon cloth for catalytic wet peroxide oxidation of phenol

Martı́nez

Pariente

Brebou

et al. 2014

J of Chemical Tech & Biotech

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BACKGROUND: Activated carbons (AC) can be used as catalyst in advanced oxidation processes due to the potential activity for hydrogen peroxide decomposition to hydroxyl radicals. Chemical surface groups and textural properties can play a crucial role in its catalytic behaviour. The pH of the reaction medium can also affect the adsorption properties of AC and the chemistry of hydrogen peroxide in catalytic oxidation processes. The AC/H 2 O 2 systems have been successfully used for the degradation of some organic pollutants in wastewaters over recent years. RESULTS: The influence of different modified-activated carbon cloth (ACC) samples has been studied. Commercial ACC samples were treated under neutral (H 2 O), acid (H 3 PO 4 ), basic (NaOH) and oxidizing (H2 O 2 ) solutions. Modified-ACC samples were assessed in the adsorption (in absence of H 2 O 2 ) and chemical advanced oxidation (in presence of H 2 O 2 ) of phenol at different pH values. ACC samples hydrothermally treated showed the best adsorption properties. ACC samples treated with NaOH solutions evidenced the best catalytic performance for phenol oxidation under acidic conditions. CONCLUSIONS: The functionalization of ACC samples with basic surface groups yielded the best catalytic performance with total phenol removal and efficient use of the hydrogen peroxide at acidic conditions.

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Section: Resultsmentioning

confidence: 99%