Advanced Materials Research Vols. 864-867

Abstract: Based on Stakelberg framework,this paper dynamically described the Government's interests by differential game,then made a comprehensive analysis on the equilibrium of cooperation and noncooperation.At last,it holds that cooperation is an effective way to solve the problem of transboundary water pollution, in order to cooperate, central government should take some policies and measures for controlling trans-boundary water pollution .

Abstract: In this paper, through understanding, analyzing and comparing of domestic and foreign treatment of high concentration organic wastewater, then derived organic wastewater can be economical and efficient handled by micro-electrolysis. But at the same time, the traditional micro-electrolysis also has some disadvantages. This paper discusses a new micro-electrolysis technology, namely cavitation-impinging stream electrolysis technology which has the advantages in treating high concentration organic wastewater. It is not only solving the process of passivation and harden problems in high concentration organic wastewater by traditional micro-electrolysis technology, but also combining with the characteristics of impinging stream coupled cavitation enhancement more effectively, making the degradation of organic pollutants maximize.

Abstract: Two types of activated carbon for the removal of element mercury in simulated flue gas were studied in the paper. Mercury adsorption process on fixed bed reactor has been researched. The conclusions are as follows: The trend of mercury concentration first decreased and then increased over time; as for two types of activated carbon, the adsorption corresponds to pseudo-first-order equation and pseudo-second-order equation respectively. Because of the high correlation coefficient, the pseudo-second-order equation will correspond to actual adsorption process.

Abstract: In this paper the degradation of malachite green by electrochemical method was studied. The effects of initial solution concentrations, temperatures, pH values, voltage, immersed electrode depths on degradation were all investigated. The results showed that malachite green was easily degraded when the solution was alkaline. High temperatures promoted the degradation. Kinetic data demonstrated that the rate of degradation could be expressed as first order.

Abstract: The original fly ash samples fetched from the power plant and the treated fly ash samples after screening, magnetic separation and mixing were used in the experiment of photocatalytic removal on mercury in flue gas. The fly ash samples and the absorption solution after experiment were tested for mercury content. The results showed that different sizes of the original fly ash had different characteristics of photocatalytic removal of mercury. The adsorption of mercury by fly ash was an important condition for the occurrence of photocatalytic effect. When the mercury adsorption capacity of fly ash was stronger, the capacity of photocatalytic removal mercury was also greater. The presence of iron oxide on the fly ash surface can promote the capability of photocatalytic removal of mercury by fly ash. The presence of ultraviolet light can significantly promote Hg⁰ oxidize to Hg²⁺ by fly ash. Thus the oxidized mercury in the flue gas can be easily absorbed by the solution.

Abstract: Wastewater from Phenolic resin production contains high concentration of phenol and formaldehyde. A combining process consisting of secondary condensation, fenton oxidation, coal fly ash adsorption and sand filter was adopted in the treatment of wastewater from phenolic resin factories. The feasibility of the process was already demonstrated by its practical operation results. After treatment by this method, not only did the effulent water reach the first order of Integrated Wastewater Discharge Standard (GB 8978-1996) and a certain amount of phenolic resin was also satisfactorily recovered.

Abstract: By SCR test device to study the main factors affecting the SCR DeNOx efficiency of flue gas for glass furnace,and analyzes the relationship between the main parameters and DeNOx efficiency, such as the reaction temperature, NH₃/NO_x, initial concentration of NOx, and space velocity.In the actual flue gas conditions of glass furnace,there was an optimum working range for the SCR test device. The reaction temperature is 340~400°C,NH₃/NO_x is 0.9~1.0,space velocity is 4000~5000 h^-1. In this condition, the DeNOx efficiency can reach 80%.

Abstract: Iron-carbon micro-electrolysis was applied in the treatment of the electroplating wastewater containing copper, and the parameters that affected the efficiencies of the wastewater treatment had been discussed, The results indicated that the optimal experimental conditions were initial pH 4, stirring speed 100r/min, total mass of iron and carbon 4g/0.1L, iron carbon mass ratio of 1, reaction time was 40min. The removal rate of the Cu²⁺ was 99% or more, the effluent can meet emissions standards

Abstract: The electrochemical oxidation of 2,4,6-trinitrophenol on Ti/SnO₂-Sb₂O₅/PbO₂ electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and 2,4,6-trinitrophenol has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of 2,4,6-trinitrophenol. Some electro-generated reagent formed in the electrolysis process and 2,4,6-trinitrophenol could be oxidized by the electro-generated reagent. The Ti/SnO₂-Sb₂O₅/PbO₂ electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-visible spectrometry and high performance liquid chromatography (HPLC), and the chemical oxygen demand (COD) was determined by the potassium dichromate method. The mechanism of 2,4,6-trinitrophenol be oxided was studied primarily by the cyclic voltammetry and UV-visible spectrometry. The results of electrolysis experiment demonstrated the possibility that the electrode was used as an anode for electrochemical treatment of 2,4,6-trinitrophenol contained in the waste water.

Abstract: The study makes SO₂ as the control object, using strong ionized plasma discharge method for experimental research on several influence factors. These influence factors include input voltage (V), SO₂ primary concentration (C_SO2), residence time (t), and frequency (f). The influence of these factors on desulfurization rate was analyzed by single variable experiment. The relation curve of single variable influence on desulfurization rate is concluded. We have designed an orthogonal experiment to analysis the significance level of these influence variables and the optimization of these variables was made after the rule of single variable experiment. The experimental results showed that: When SO₂ primary concentration(C_SO2),oxygen content(φO₂), H₂O content(φH₂O), the residence time of gas streams flowing the reactor(t), gas flux(Q), input voltage(V) and frequency(f) are respectively 140×10^-6(V/V)~160×10^-6(V/V), 21%(V/V), 2.1%(V/V), 0.85s, 0.16m³/h, 3.0kV and 5.4kHz, the tiptop desulfurization rate was over 80%.