Enhanced dechlorination of tetrachloroethylene by polyethylene glycol-coated zerovalent silicon in the presence of nickel ions

Jet electro-absorbers for the treatment of gaseous perchloroethylene wastes

“…Figure 8 shows the distribution of different products detected at the end of the absorption and electro-absorption processes using the coarse and fine-bubble jet absorbers and a sodium sulfate solution as absorbent-electrolyte. As seen, main intermediates are phosgene, carbon tetrachloride and trichloroacetic acid and the differences observed in the speciation in each of the processes may indicate the promotion of different removal pathways with each technology [49][50][51]. In gas phase, when perchloroethylene is in contact with water vapor, this compound is known to be unstable, being transformed into phosgene.…”

Synergistic effect of Cu adsorption on the enhanced photocatalytic degradation of bisphenol A by TiO2/titanate nanotubes composites

“…Previous studies [42,43] have depicted that the reaction kinetics for organic removal by catalysts followed the surface-mediated processes where the initial rate of reactants was positively related to the adsorption of reactant/reductant onto the metal surfaces and the reaction rate constant decreases upon increasing initial concentration. The Langmuir-Hinshelwood kinetic model can thus be used to describe the relationship between the initial concentrations and initial rate of BPA.…”

Dechlorination of 2,4-dichlorophenol by zero-valent iron nanoparticles impregnated MCM-48

“…But, the obtained kinetic rate constants and surface area data showed the superior of surface increasing of proposed reagent versus this limitation. On the other hand, the adsorption of 2,4-DCP molecules on the surface of mesoporous MCM-48 can be due to effective collusion of pollutant molecules with ZVI nanoparticles in pores of MCM-48 [29,30]. Based on the proposed mechanism (Eqs.…”