CIMO - Resumos em Proceedings Não Indexados à WoS/Scopus
Permanent URI for this collection
Browse
Browsing CIMO - Resumos em Proceedings Não Indexados à WoS/Scopus by Subject "4-Nitrophenol"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
- Magnetic carbon xerogels for the catalytic wet peroxide oxidation of 4-nitrophenol solutionsPublication . Ribeiro, Rui; Silva, Adrián; Faria, Joaquim; Gomes, HelderCatalytic wet peroxide oxidation (CWPO) is a well-known advanced oxidation process for the removal of organic pollutants from industrial process waters and wastewater. Specifically, CWPO employs hydrogen peroxide (H2O2) as oxidation source and a suitable catalyst to promote its decomposition via formation of hydroxyl radicals (HO•), which exhibit high oxidizing potential and serve as effective species in the destruction of a huge range of organic pollutants
- Reaction lag-phase in the CWPO of 4-nitrophenol solutions with P-doped carbon black catalystsPublication . Díaz de Tuesta, Jose Luis; Quintanilla, Asunción; Casas, Jose A.; Rodriguez, Juan; Ribeiro, Rui; Silva, Adrián; Faria, Joaquim; Gomes, HelderPrevious works have demonstrated that Chemviron Carbon Black (CB) is a catalyst capable to combine a good activity with an adequate stability for long term use and high efficiency of H2Ü2 consumption in the catalytic wet peroxide oxidation (CWPO) process [l]. Phosphorous doping was now used as a mean to increase the catalyst performance.
- Selective oxidation of 4-nitrophenol with H2O2 in a biphasic system by janus-like carbon nanotubesPublication . Sanches, Flávia Kim; Roman, Fernanda; Silva, Adriano S.; Díaz de Tuesta, Jose Luis; Silva, Adrián; Faria, Joaquim; Machado, Bruno; Serp, Philippe; Marin, Pricila; Gomes, HelderThe use of petroleum-based products has increased drastically with the increase in population, resulting in the deposition of oily products in aquatic systems. It is estimated that for each ton of petroleum that undergoes refinement processes, between 0.5 and 1 ton of oily wastewaters are generated, bearing an oil concentration that may reach 40 g L-1 [1,2]. Hazardous pollutants dissolved both in oily and aqueous phases may also be found in those oily wastewaters [3], hindering their treatment through conventional processes. Furthermore, the oil phase is, in some cases, an added-value product, and its degradation results in economic losses. Thus, the development of processes that allow the removal of hazardous contaminants from oily and aqueous phases, providing an opportunity for recovering both phases, should be advantageous [3]. This work deals with the selective removal of a hazardous compound (4-nitrophenol, 4-NP) from a simulated oily wastewater (2,2,4-trimethylpentane:water = 10:90 v/v) by an oxidative process considering H2O2 as oxidant and amphiphilic Janus-like carbon nanotubes as catalysts. Amphiphilic catalysts were selected since they should present advantages in this process due to their ability to interact with both aqueous and oily compounds and phases [4]