Arsenic (V) removal using cetylpyridinium chloride (CPC) micelles and 5 kilo-Dalton (kDa) polyethersulfone (PES) membrane was studied in the presence of multiple co-ions. The concentrations of arsenic ([As]F = 0 105 μg/L) and co-ions ([CO3] = 0 – 4 mg/L, [PO4] = 0 – 0.3 mg/L, [SiO3] = 0 – 71 mg/L, and [SO4] = 0 – 400 mg/L) in simulated feed water were varied. Without the addition of CPC micelle...

Carboxydothermus hydrogenoformans is a thermophilic strictly anaerobic bacterium that catalyses the water gas shift reaction, the conversion of carbon monoxide with water to molecular hydrogen and carbon dioxide. The thermodynamically favorable growth temperature, compared to existing industrial catalytic processes, makes this organism an interesting alternative for production of cheap hydrogen...

This research was conducted to study the effect of lime based Flux with the composition of CaO-20%CaF2-8%FeO on simultaneous removal of phosphorus and Sulfur from hot metal. The effects of Na2O and oxygen blowing were also studied. The experiments were performed using an induction furnace and hot metal produced in Isfahan Steel Company in the temperature range 1350-1450 ºC...

background: among alkanes, n-alkanes with medium chain have been identified as the most important contaminants of the soil. n-hexadecane (c16h34) with low solubility in water also belongs to this group and has been used by many researchers as a model contaminant. the present study aimed to investigate the effect of the external source of carbon (glucose) as co-substrate on removal of hexadecane...

Hydrothermal and non-hydrothermal spherical TiO2 nanoporous with crystalline framework were prepared by sol-gel method. The Crystalline structures, morphologies and surface texturing of materials were determined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N2 adsorption-desorption isotherms. The Hydrothermal spherical TiO2 nanoporous was found to have a narrow and strong p...

Abstract In this study, a mathematical model is proposed for CO2 separation from N2/CO2 mixtureusing a hollow fiber membrane contactor by various absorbents. The contactor assumed as non-wetted membrane; radial and axial diffusions were also considered in the model development. The governing equations of the model are solved via the finite...

We have been studying dry surface decontamination technology with low-pressure arc plasma (LPAP). The dependence of the decontamination performance on Co distribution in the test piece was investigated. The Co removal ratio became lower when Co was distributed more deeply in the metal oxide film, although all the metal oxide film was removed. However, a Co removal ratio exceeding 90% was eventu...

The mechanism of aqueous contaminant removal by elemental iron (Fe 0 ) materials (e.g., in Fe 0 -H2O systems) has been largely discussed in the “iron technology” literature. Two major removal mechanisms are usually discussed: (i) contaminant adsorption onto Fe 0 oxidation products, and (ii) contaminant reduction by Fe 0 , Fe II or H/H2. However, a closer inspection of the chemistry of the Fe 0 ...