Topic
Wet oxidation
About: Wet oxidation is a research topic. Over the lifetime, 3094 publications have been published within this topic receiving 61536 citations.
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TL;DR: In this paper, a model that describes the evolution of soluble biopolymers during the wet oxidation of activated sludge was proposed and successfully fitted to the experimental data, achieving values of 23.1%, 14.7%, 8.3%, 0.9% and 0.5% for proteins, humic acids, carbohydrates, uronic acids and DNA, respectively, with regard to the initial volatile suspended solids con...
Abstract: In this paper, wet oxidation was applied to an activated sludge as a potential technique for the recovery of products of industrial value. With this end, the effect of the treatment on the polymeric composition of the sludge was analyzed. To establish differences due to the origin of the biopolymers (extracellular or intracellular), the sludge was separated into fractions: soluble microbial products (SMP), loosely bound extracellular polymeric substances (LB-EPS), tightly bound extracellular polymeric substances (TB-EPS) and naked cells and each was treated at 190 °C and 65 atm. A model that describes the evolution of soluble biopolymers during the wet oxidation of sludge was proposed and successfully fitted to the experimental data. Results showed a rapid solubilization of polymers during the first minutes of reaction, achieving values of 23.1%, 14.7%, 8.3%, 0.9% and 0.5% for proteins, humic acids, carbohydrates, uronic acids and DNA, respectively, with regard to the initial volatile suspended solids con...
17 citations
TL;DR: In this paper, the relationship between roughness at the Si/SiO2 interface and the oxide thickness was investigated by means of a nondestructive measuring method, using the Si metaloxide-semiconductor (MOS) structure.
Abstract: The relationship between roughness at the Si/SiO2 interface and the oxide thickness was investigated by means of a nondestructive measuring method, using the Si metal-oxide-semiconductor (MOS) structure It was demonstrated that the Si/SiO2 interface roughness recovers during thermal oxidation This recovery process was also verified by observation with the transmission electron microscope (TEM) It was found that the recovery effect on the roughness at the Si/SiO2 interface depends on the oxidation process and that it is more significant in wet oxidation than in dry oxidation
17 citations
TL;DR: In this article, the surface chemistry and textual properties of OMC FDU-15 modified by wet oxidation using (NH4)2S2O8 as a benign oxidant were investigated.
17 citations
TL;DR: In this article, the authors performed a systematic study on wet air oxidation (WAO) and the related decrease efficiency of COD, TOC, influencing factors, characteristics of the kinetics was performed in a 2-l high-pressure batch autoclave.
17 citations
TL;DR: In this paper, the authors reported the catalytic wet air oxidation of paper industry wastewater using CuO CeO 2 nanocatalysts, which were prepared by co-precipitation method without using any surfactant.
Abstract: Today, the removal of persistent organic pollutants from industrial wastewater stands a major challenge. Here we report the catalytic wet air oxidation of paper industry wastewater using CuO CeO 2 nanocatalysts. The catalysts were prepared by co-precipitation method without using any surfactant. The catalysts were characterized by XRD, FTIR, XPS, Raman, N 2 -sorption, FE-SEM, TEM and EDX techniques. Characterization results revealed the formation of porous CuO CeO 2 nanocatalysts with high surface area, pore volume and oxygen vacancies. Interaction between copper and cerium greatly enhanced the catalyst activity, and the maximum removal of COD (67%), color (81%), AOX (61%), TOC (64%) and chlorophenolics (66%) was achieved with Ce 40 Cu 60 nanocatalyst. The degradation of non-biodegradable compounds resulted in increased biodegradability index.
17 citations