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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...
An aim in study volatile organic compound (VOCs) emission is to improve indoor air quality. VOCs are the major indoor air pollutants, this paper introduced the types ,sources and characteristics of pollution caused by VOCs in indoor air, and effect of VOCs on human health were presented. The pollution from sources, adsorption technology and photocatalytic oxidation technology ect. In order to understand...
Humic acid (HA) was considered to be the main precursor of disinfection by-products (DBPs) in chlorination. In this study, an effective and economic method of preparing TiO2 film was successfully developed for adsorption of HA. The crystal structure and surface morphology of the TiO2 film were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The effects of some factors such...
In order to optimize the adsorption capacity of room-temperature catalytic oxidation (RCO) composite on indoor formaldehyde, two methodologies are investigated in this study with different purposes. One focuses on physical characteristics, where a series of experiments were set up to examine the impact of preparation conditions and ingredient dosages on the mechanical strength of RCO material. The...
For the advanced treatment of drinking water by activated carbon, the effects of adsorption on removal of dichloroacetic acid, dibromochloromethane, benzene and carbaryl in water, as well as the competitive adsorption between these pollutants were investigated with three different activated carbon (new carbon, regenerated carbon and used carbon). The results showed that good effect of the adsorption...
A new polymer, oxidative Poly-Si-Fe (PSF) coagulant was prepared by an oxidization and copolymerization method. The influence of the oxidization of PSF on the adsorption of humid acid (HA) was explored, in comparison with that of polyferric aluminum (PFA). The results show that PSF changes the molecular structure of HA, leading to the improvement of adsorption of HA.
A novel photocatalyst (Bi20TiO32) was synthesized by chemical solution decomposition (CSD) and it was calcined at the temperature of 300??C. It exists in nanosheets with a diameter around 90 nm. The as-prepared Bi20TiO32 is visible-light responsive (up to 500nm in wavelength) without sacrificing its ability for absorbing UV light. The specific activity of Bi20TiO32 is higher than anatase TiO2 under...
Experiments were carried out to study the factors influencing modification of activated carbon (AC) and the effect of adsorption of Phosphine (PH3). Impregnated AC was used as a modified adsorbent and its adsorption capacity for PH3 was studied in laboratory. The factors influencing modified AC included the type of adsorbent, the type of impregnant and the concentration of impregnant. The adsorption...
A new environmental functional material-quaternary ammonium cationic cellulose (QACC) was synthesized in this paper. Preparation conditions were optimized. The modified cellulose was fully characterized by fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM). The stability of QACC was studied. Adsorption rules of water-soluble persistent organic...
Degradation of nitrobenzene by ozone/zeolite process was investigated under different experimental conditions. The results showed that the removal efficiency of nitrobenzene was significantly promoted in the presence of zeolite compared with the case of ozonation alone. By investigating the effect of tertbutyl alcohol on nitrobenzene removal, it was concluded that nitrobenzene was mainly degraded...
First, the time evolution of O atoms density in the gas phase during the post-discharge of a pulsed N2-O2 DC plasma is studied using a plasma induced fluorescence technique (PIF) where a main long pulse creates the plasma and a shorter one re-excites atoms in the time post-discharge. The surface loss coefficient of O atoms on pyrex, porous silica, porous TiO2 is measured, this latter being a photocatalytic...
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