A perovskite catalyst combined with various advanced oxidation processes (AOPs) to treat organic wastewater attracted extensive attention. The physical and chemical catalytic properties of were largely related oxygen vacancies (OVs). In this paper, the recent advances in regulation OVs for enhancing functionality was reviewed, such as substitution, doping, heat treatment, wet-chemical redox rea...

Kinetic modeling of enzymolysis of pulp fiber waste pretreated by a wet oxidation process was studied. First, a wet oxidation pretreatment of fiber waste was carried out. It was found that hemicellulose were removed efficiently, yielding material with a pentosan content of 4% (based on the o.d. biomass). A statistical kinetic model was developed based on the experimental results of the enzymati...

in this study, an efficient and facile technique for preparing graphene oxide in suspension and powder forms was presented based on a modification on hummers' method followed by an additional ultrasonic process. the method involved the provision of graphene oxide from graphite by reaction of potassium permanganate and sulfuric acid with stabilizing the medium complex. furthermore, this stu...

About 500-nm-thick films of Ge,-,,6Sic64 and Ge o.28Si0.72 grown epitaxially on ( 100)Si have been oxidized at 700 “C in wet ambient. A uniform Ge,Sit -,O, oxide layer forms with a smooth interface between it and the unoxidized Ge$i, _ X layer below. The composition and structure of that layer remains unchanged as monitored by backscattering spectrometry or cross-sectional transmission electron...

Working with Wetox Ltd, a lab scale plant for the continuous oxidation of wastes from municipal water treatment and industrial processes has been developed at IRL using wet air oxidation (WAO). The WAO process can be used to significantly reduce the chemical oxygen demand (COD) of waste sludge and to recover components such as aluminium and phosphate. WAO requires high temperature (240 – 300 °C...

Uptake of (14)CO(2) in soils due to algae or sulfur-oxidizing bacteria was examined by incubation of soil samples with gaseous (14)CO(2) and subsequent chemical oxidation of biologically fixed radioactive isotope to (14)CO(2) for detection with a liquid scintillation counting system. The (14)CO(2) was added to the soil in the gas phase so that no alteration of the moisture or ionic strength of ...

Seed-mediated growth of gold nanoparticles on glassy carbon (GC) surfaces was developed. The field emission scanning electron microscopy (FE-SEM) and electrochemical characterization confirmed the effective attachment of gold nanoparticles on GC surface with such a wet-chemical method. The as-prepared gold nanoparticles attached glassy carbon electrode (Au/GCE) presented excellent catalytic abi...

Hydrothermal processes such as thermal hydrolysis and wet oxidation technologies are becoming an essential part of sludge management strategies adopted in modern wastewater treatment plants. These technologies contribute not only to the reduction of waste volume, but also to the improvement of their environmental performance. Enhanced biogas production, energetically self-sufficient processes, ...