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The Fenton reagent oxidation method has been applied to experiment on the electro luminescent materials wastewater treatment. The disadvantages of liquid waste, take waste water for example, can be listed as follows: less discharge, out of proportion, complex composition, low PH. After single-factor and orthogonal experiments, the optimum reaction conditions obtained for the reaction time of 1h, PH...
In this paper, the degradation efficiency, effect factors and kinetics of dye Levafix Navy in UV/H2O2 system have been investigated. The results show that UV/H2O2 system has a high activity on degradation of dye Levafix Navy with so little H2O2 on so concentrated dye solution, and the photo decomposition reaction of the dye is concurrent besides the photo-oxidative degradation. The dye degradation...
The mineral processing wastewater of sulfide ore is easily cause environment pollution, because it contains xanthate. This thesis applied the combined technology of ultrasound and Fenton reagent to deal with the artificial and actual mineral processing wastewater, in terms of the effects of pH value, H2O2 and Fe2+ concentration on the removal efficiency of xanthate. The results showed that combined...
Chlorobenzene(CB), one of the persistent organic pollutants (POPs), is a refractory semivolation organic compound and non-biodegradable. Treatment of CB contaminated wastewater by traditional method is essentially impossible. In the study, the sono-photocatalytic degradation of CB was examined in aqueous suspension using the TiO2 as photo catalyst. Some factors affecting the degradation rate of CB...
The composite photo catalyst of Fe3+-TiO2-zeolite is prepared in a bench scale, which is immobilized into a zeolite matrix by means of sol-gel technique. The oilfield wastewater in Huabei oilfield was chosen as the model pollutant to evaluate photo catalytic activity under the ultraviolet light and sunlight irradiation respectively, the possible mechanism of photo catalytic oxidation was deduced....
The impact of organic matter concentration on nitrification was studied in shortcut nitrification SBR. The results showed that the competition of aerobic bacteria had been enhanced and degradation rate of ammonia had been reduced in the system with the increasing of COD concentration and the loading of sludge. Denitrification in the system was apparent, removal rate of total nitrogen was increased...
Mangroves are a diverse group of unrelated trees, palms, shrubs, vines and ferns that share a common ability to live in waterlogged saline soils subjected to regular flooding Mangroves are functioning as buffer between sea water and ground water. They are highly specialized plants that have developed unusual adaptations to the unique environmental conditions in which they are found. The wastewater...
Photo-Fenton reaction is a kind of advanced oxidation technology based on the reaction of hydroxyl radical. In order to further enhance the photocatalytic efficiency, with citric acid as the catalytic additive, and malachite green as the substrate, experiments on the photocatalytic oxidation of organic pollutants in UV/Fenton/Citric acid system were carried out. Effect of Fe(II) concentration, initial...
In this paper, the degradation of 2,4,6-trichlorophenol (TCP) by hydrogen peroxide catalyzed by nano-iron was studied. Nano-iron was obtained through chemical reduction of FeSO4·7H2O and KBH4. The influences of pH, the concentration of H2O2, temperature, ionic strength and the amount of nano-iron on the degradation of TCP were investigated. The result showed that under the optimized condition, more...
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...
A kind of technology and process of treating printing and dyeing wastewater with high efficiency and low energy consumption was presented. Based on the analysis of the current methods, this article summed up the more practical way, combining theory with practice, to provide some references for the similar projects.
In this paper, the domestication of the activated sludge by which nitrobenzene can be degraded in a relatively poor nutrition is studied. The ability of activated sludge degradation of nitrobenzene is studied by degradation kinetics. The toxicology validation about the effect of activated sludge degradation of nitrobenzene is preliminarily explored. The results show that: The nitrobenzene could be...
Electrocatalytic oxidation (ECO) of phenol was carried out using a self-made anode, Ti/SnO2-Sb2O3-IrO2. Preliminary investigations showed that only a small fraction of phenol was oxidized by direct electrolysis, while complete degradation of phenol was achieved by indirect electrocatalytic oxidation using chloride as a supporting electrolyte. Chlorophenols and formic acid were the intermediate products...
Degradation of phenol by streamer corona plasma in aqueous solution with suspended TiO2 was conducted. The experimental results present that the addition amount, the crystal size and structure of TiO2 influenced the phenol degradation. In this paper phenol degradation increased with the addition amount of TiO2 in the range of 0-0.4 g/L; the highest degradation rate of phenol was obtained when Degussa...
In order to treat a mass of industrial wastewater nitrobenzene, a photocatalytic degradation method was studied in this paper. Phosphotungstic acid(H3PW12O40) and titanium dioxide(TiO2) were prepared, and a new-style catalyst H3PW12O40 supported on TiO2(H3PW12O40/TiO2) was prepared by the method of impregnation. We characterized them using X-Ray and FT-IR. The results proved that H3PW12O40 possessed...
In this paper, the synergetic action of UV-Fenton catalytic oxidation and nano-TiO2 photocatalytic to treat Azocarmine G dye wastewater was researched. The results show that the best conditions for the treatment of 250mL Azocarmine G dye wastewater are: the dosage of 30% H2O2 is 1mL; the dosage of 0.1mol/L FeSO4·7H2O is 3mL; the dosage of nano- TiO2 is 1g; pH is 4; illumination distance is 21cm. In...
Di-(2-ethylhexyl) phthalate (DEHP) is one of the typical endocrine disrupting chemicals found in water and wastewater. Concentrations of DEHP in water, wastewater and reclaimed wastewater are summarized based on published literatures. Concentrations of DEHP in source water for drinking or final sewage effluents sometimes definitely exceeded legal stipulations for DEHP limits in China. Although physicochemical...
Supercritical(sub-critical) water oxidation technology is applied to degrade the explosive wastewater and low its chemical oxygen demand (COD). The technology optimum and reaction dynamics of TNT, RDX, HMX degradation have been investigated. The experiment results show that the optimum degradation technology is: reaction temperature T=648K, reaction time t=5min, the volume proportion of waste water...
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...
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...
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