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A strain of bacterium, Rhodopseudomonas palustris PSB-1D, which could degrade o-chlorophenol (2-CP), was isolated and screened from shallow sediment in downstream side of the sewage outfall of an insecticide factory. The strain PSB-1D could not utilize 2-CP as the sole carbon source and energy resource. However, it could degrade 2-CP in the presence of co metabolism substrates. Seven kinds of additional...
Isotherms and kinetics of adsorption of phenol on microwave organic modified montmorillonite were investigated. The results show that the adsorption capacity of M-OMt was determined as 58.14 mg/g at the conditions of pH7.2 contact time of 1 hour and temperature of 20 C. The adsorption data is a good fit with Freundlich isotherm, and the adsorption kinetics is in better agreement with pseudo-second...
This study focuses on the effects of two flow patterns on photo degradation of organic compounds with TiO2 film immobilized on the inner wall of glazed ceramic tube. Pattern 1 is to pump the solution into the tube from the bottom and overflow from the top. Pattern 2 is to spray the solution on the inner surface and flow from the top to the bottom along the inner wall. Experimental results indicated...
Three dominant bacteria of A-1, B-1 and C-1 for phenol degradation were screened by domestication. Then study on the treatment efficiency of phenol by the three dominant bacteria was carried out under different concentration of phenol wastewater. The results showed that phenol removal efficiency decreased as the phenol concentration increasing. The phenol removal efficiency rates achieved 46.74%,...
In this work, the TiO2 film was immobilized on the surface of glass and stainless steel tubes by sol-gel method and phenol was photo degraded with the TiO2 film. Compared with stainless steel, the photo catalytic activity of TiO2 film on glass is lower, although the surface of glass is more even. According to the XPS results, appearance of the element Na decreases the photo catalytic activity. Photo...
Printed Circuit Board (PCBs) wastes are a typical kind of electronic wastes. The recycling and disposal of PCBs wastes have become an important issue. Thermal degradation via pyrolysis is considered to be a feasible disposal approach. The microwave induced pyrolysis of PCBs wastes was performed in a bench scale microwave reactor with a horizontal quartz tube. The effects of reaction conditions on...
Titanium dioxide (TiO2) film was prepared on activated carbon fibre (ACF) by hydrolysis technique, using sulphate titanium as raw material. Based on the techniques of photo catalytic degradation using TiO2/ACF, and 254nm UV-ray as the light sources, aqueous phenol solution of 40mg/L was photo catalytic decomposed over TiO2 film. The result showed that TiO2/ACF exhibited a degradation efficiency of...
In this work, reactions of phenol were carried out in supercritical argon (critical temperature, Tc: 150.7 K, critical pressure, Pc: 4.8 MPa) with pulsed discharge plasma to understand reaction characteristics and to evaluate possibility that this technique will be applicable for a new “green” polymerization technique of functional polymeric materials. Experiments in subcritical water or in supercritical...
Study on the adsorption properties of an organic volatile contaminant on residual soil mixed with multi-walled carbon nanotube (MWNT) is presented. The soil samples were thoroughly characterized for their physical chemical properties and composition, particularly organic matter. The adsorption isotherms are well described by both Langmuir and Freundlich models. The result shows that MWNT can be good...
Degradation of phenol by an electrochemical heterogeneous catalytic process was applied in packed bed electrolytic reactor with graphite electrode. The catalyst was characterized by SEM and the effects of pH, the applied potential and Na2SO4 on the efficiency of the electrochemical oxidation phenol process were also studied. It was found that the optimal condition was an applied potential of 25V,...
A strain of phenol-degraded bacterium was isolated from polluted river bank nearby a steel plant. The isolate was identified as Pseudomonas sp. by 16S rDNA sequence and biochemical characteristics analysis. Experiments showed, Under the conditions of incubation amount of 1%, The initial pH of culture medium in the range of 5.5~7.5 and culture temperature 30~35°C, This Phenol-degraded bacterium was...
The effects of various inorganic anions (SO42-, NO3-, H2PO4-, HCO3-, CO32-, F-, Cl-, Br- and I-) on the photocatalytic degradation of phenol were investigated under UV light irradiation. In present work, low initial pH value in the presence of H2PO4- increased the photocatalytic degradation efficiency of TiO2, high initial pH value in the presence of HCO3-, CO32- and F- decreased the photocatalytic...
In order to study the purification ability of reed wetland soil to phenol, the dynamic soil column method and static degradation method was conducted, the results indicated that, wetland soil without reed-planted had a high purifying efficiency to phenol. Reed may affect purifying efficiency of wetland soil to phenol by changing soil infiltration and physicochemical properties of rhizosphere.
Contaminants in wastewater influenced oxygen transfer in aeration process greatly. The effects of different typical contaminants on oxygen transfer in microbubble aeration were investigated and compared with traditional bubble aeration, including surfactant SDBS, soybean oil, phenol and nitrobenzene as well as kaolin. The results indicated that these contaminants showed different effect on oxygen...
In this paper, the emergent treatment for raw water from upper-reach of Huangpu river polluted by phenol was studied through small scale and pilot experiments. The removal capacities for volatile phenol of individual coagulation, individual powdered activated carbon (PAC) adsorption and PAC adsorption-flocculation process were examined, and the optimum technological parameters for emergent treatment...
In order to study phenoloxidase (PO) activity of the phenol-degrading bacteria, the carbon source of isolation culture medium adopts artificial phenol mixture. Stenotrophomonas maltophilia K279a is isolated from coal chemical industry wastewater. The optimum conditions for PO production are phenol 1000mg/L, temperature 30-34°C and PH 7-7.5. The strain resists 980mg/L COD and 805mg/L phenols. The degradation...
Multi-walled carbon nanotubes (MWNTs) were dispersed into polyimide (PI) by mechanical ball milling. A titanium mesh electrode was covered by the multi-walled carbon nanotubes film. The MWNT - PI film was etched and amidated to get active, homogeneous and stable interface with carbon nanotubes rooted in polyimide. The morphology of the resulting MWNT - PI film was characterized by scanning electron...
The degradation and its kinetics of chlorine chlorination of phenol in disinfection process was studied. The influencing factors were investigated, such as chlorine dosage, temperature and background organic compound and so on. The experimental results showed that the degradation of phenol by chlorine followed second-order kinetics. The temperature influenced the reaction sharply, and it followed...
Adsorption of organic compounds on montmorillonite can be improved effectively by organic modified method. Cetyltrimethyl-ammonium Bromide (CTAB) is inserted into montnorillonite using common heating method and microwave irradiation to achieve organic montmorillonites. The adsorption effect of phenol has been used as evaluation index to optimize preparation technology, and the structure of prepared...
The effect of preoxidation Yellow River with light polluted water by composite potassium permanganate process are studied in the text. The best adding quantity of composite potassium permanganate is 1.5-3.0 mg/l, PAC as the flocculant, the best adding quantity is 60 mg/l. Under these conditions, pretreat Yellow River with mic-polluted water which the results show that permanganate preoxidation obviously...
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