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Sintering of Ni particles in the Ni-based anode is a major obstacle to the widespread use of solid oxide fuel cell because the sintering induces the degradation in the anode. The large amount of water vapor in the fuel is known to accelerate the degradation during the operation. However, the detailed accelerated sintering mechanism is unclear. In this study, to clear the accelerated sintering mechanism...
The failure to remove tetracycline (TC) in most conventional wastewater treatment systems results in the discharge and accumulation of TC in the environment, which in turn, increases the potential for developing TC-resistance in naturally occurring microorganisms. Thus, there is a need to explore other processes that can enhance TC degradation during wastewater treatment. In this study, we investigated...
Simultaneous reduction of graphene oxide (GO) and silver nitrate (AgNO3) into stabilizer-free Ag-Graphene Naoncomposite (AGN) using DMAc-assisted thermal reduction method with controllable density of Ag nanoparticles (Ag NPs) is reported. Microscopy techniques (scanning electron microscopy and high-resolution transmission electron microscopy) have been employed to probe the morphological characteristics...
Curcumin, a non toxic yellow food additive, has been used here to sensitize TiO2 in photodegradation of methyl orange contaminant in water with solar light. Using natural dyes is a promising replacement for the hazardous heavy metal-based systems, such as CdS and Ru-compounds, in sensitizing wide band gap semiconductors. Naked (TiO2/Curcumin) and activated-carbon supported (AC/TiO2/Curcumin) catalyst...
The wastewater containing alcohol ethoxylates (AEs) from the processing of Orimulsion was treated by ozonation with the presence of activated carbon (AC) in a laboratory-scale reactor. Effect of some operating parameters, such as the AC amount, initial pH, and the ozonized-air flowrate, on the COD removal were investigated. The results show that the application of catalytic ozonation of AC can significantly...
Mn1Ce1 and Mn0.9Co0.1Ce1 complex oxides were prepared by co-precipitation in hydrothermal conditions and their physicochemical properties were characterized with N2 adsorption, XRD, Raman, and SEM. The complex oxides show enough stability and catalytic activity for oxidative degradation of 4,4'-Dibromobiphenyl in sub-critical water. Mn0.9Co0.1Ce1 has higher activity than Mn1Ce1, indicating doping...
A study was conducted on the adsorption kinetics of diuron from aqueous solutions onto activated carbon fiber. The results showed that the formation of hydrogen bonds between diuron and water, and temperature variations may possibly affect the adsorption process. Furthermore, adsorption of diuron onto activated carbon fiber was affected remarkably by solution pH and the maximum adsorption amount was...
Adsorption equilibrium and kinetics of typical acidic and basic dyes, acid red 33 and basic violet 3, onto Semen Euryales Shell Activated Carbon (SESAC) were investigated under varying solution pHs and temperatures. Equilibrium data showed acidic pH was favourable for the adsorption of acid red 33 onto SESAC, while basic pH was favourable for basic violet 3. The adsorption capacity of dye increased...
Glyphosate is the herbicide widely used in China. However, little is known on the processes governing the environmental fate of glyphosate in soils and its environmental risk for groundwater. Laboratory experiments were performed to evaluate the degradation, adsorption, and leaching behavior of glyphosate in three agricultural soils with high sand content and different soil organic carbon content...
In order to protect groundwater resources, two types of soils were selected as experimental materials to investigate adsorption mechanism of BTEX series compounds on soils in this study. The laboratory testing programs were carried out by static adsorption experiments, therefore adsorption isotherms of BTEX series compounds on different soils were obtained. The results indicated that adsorption isotherms...
In order to study the effect of fillers with adsorption and drying on rubbish degradation, leachate production and water quality of leachate, five cylinder reactors for landfill disposal were built to simulate the operation of landfill, one reactor was used as contrast reactor, no filler added in it. Saw powder, activated carbon, zleolite and newspaper were added into another four reactors. In the...
The experiments of formaldehyde (HCHO) removal from air were performed with photooxidation technology, adsorption technology, and photooxidation-adsorption technology respectively. According to results of experiments, the photooxidation-adsorption technology had the best removal efficiency of HCHO than two others, and the relative air humidity played an important role to these technologies. After...
Macroporous TiO2 with mesocellular foam structure was prepared using eggshell membrane as a single template. The as-synthesized catalyst was characterized by N2 adsorption-desorption analysis, X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) analysis. The results indicate that hierarchical porous structure exists in the as-synthesized TiO2 membrane. The mesocellular foam is composed...
The effect of loaded pellets in high voltage pulse discharge was investigated. There were some changes in the surface characteristics of different pellets with loaded catalysts. The specific surface area of the pellet loaded with ferric hydroxide increased and the pellet loaded with titanium dioxide decreased. Pore volume and pore size of loaded pellets were small. The adsorption of phenol on the...
TiO2 catalyst was prepared by two kinds of different methods. The photocatalytic activity of TiO2 prepared by the hydrothermal method is 2.5 times higher than that by sol-gel in degradation dimethyl phthalate (DMP). The combined photocatalysis with UV irradiation and ozonation (TiO2/UV/O3) process considerably improved mineralization and degradation of dibutyl phthalate compared to combined photocatalysis...
Abstract-This study aimed at improving the photocatalytic oxidation of humic acids (HA) in α-Fe2O3suspensions by adding calcium cationic ion (Ca2+). A visible light photocatalyst of α-Fe2O3 was prepared by co-precipitation method and characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). First a set of tests was conducted in the dark to study the adsorption of HA onto α-Fe...
Laboratory-scale batch experiments were conducted for investigating the adsorption of bisphenol A (BPA) at mg/L range onto activated sludge liquid. In batch adsorption experiments, all the adsorption isotherms obtained were found to fit the fifth species in five common types of adsorption isotherms at 25°C. The adsorption reached equilibrium quickly within 30mins, the maximum amount adsorbed was 1...
The decomposition of high concentration pentachlorophenol (PCP) loaded on granular activated carbon (GAC) was studied by dielectric barrier discharge (DBD) plasma. The effects of discharge voltage, treatment time, gas kinds and flow rate on PCP degradation efficiency were discussed. The results indicated that increasing discharge voltage and treatment time could enhance the degradation efficiency...
Through potassium pyrosulfate melting method, the acidity titanium dioxide sol is prepared, and then the TiO2/sepiolite composite water treatment agent is prepared by serials of soaking, shaking and heating process, the adsorption and photo-catalysis property of TiO2/sepiolite composite water treatment agent to the simulated active-blue dye wastewater is also studied. The results showed that, compared...
In this study, a combined treating process (neutralization, electrolysis, ozone oxidization, coagulation and cinder adsorption) was introduced to investigate the possibility of degradation of concentrated azo dye wastewater. The optimum operation parameters were obtained through small-scale bench tests and pilot-scale tests, and then were put into operation. The experimental results showed that the...
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