To explore phytoremediation potentiality of soils polluted by herbicide, ryegrass (Lolium multiflorum Lam.) , lxeris (Lxeris sonchifolia Hance) and mungbean (Vigna radiata Wilczek) were used for investigating the effects of plantation of these crops on the degradation of diuron by pot experiment method and incubation experiment method. The main results were as followed:1. After cultivation of these plants in soils contained 1-2 mg/kg diuron for 30-60 days, the residue of diuron reduced by 30.56%-72.21%. Moreover, the effect of planting mungbean on degradation of diuron was more significantly than that in ryegrass, while the effect in lxeris was not significantly as in ryegrass and mungbean.2. After planting for 30-60 days, the amount of both microorganism and microbial biomass C were higher than that in control soil notably (P<0.05 ) . The population of microorganisms was the most in mungbean planting soil, next in ryegrass planting soil, and the least in lxeris planting soil.3. After the addition of l-2mg/kg diuron to the soils for 15 days, the residues of diuron in rhizosphere soil were all less than that in bulk soil notably (P<0.05) , Furthermore, as time was delayed, the residue of diuron in rhizosphere soil was reducing constantly. However, the population of microorganism had an increasing trend. The residue of diuron in mungbean rhizosphere soil was the least, next was ryegrass, and the most was lxeris. Furthermore, the diuron residue increased sharply after sterilization. During the degradation process, there was a notably negative relationship between the logarithm of the microorganisms population and the residues of diuron in soil (P<0.01) .4. After the addition of root exudates to the soils contained 1 mg/kg diuron for fifteen days, the residue of diuron in soil was notably lower than that in the control. The effect of root exudates on degradation of diuron in soil was impacted by the components of the exudates. In the root exudates of mungbean, the contents of water-soluble nitrogen and carbohydrate were higher and C/N was lower. After adding the root exudates of mungbean into soil contained diuron, the microorganisms population increased in a large amount, which resulted in notably lower residue of diuron than that in soils contained lxeris and ryegrass root exudates . On the contrary, there were few carbohydrate and water-soluble nitrogen in lxeris root exudates, so its effect on microorganism activity and diuron degradation was insignificant.5. The photochemistry degradation of diuron in oxalic acid-Fe system could be observed in natural light condition, while the degradation of diuron could not detected without irradiation.

Electrochemical oxidation processes,as a technology that friendly to the environment, good capability to deal with pollutants,small size of equipments been concerned by researchers.In recent years,this technology has been successfully applied in the purification of wastewaters come from textile,oil refineries and leather industries.DSA as the most important component of the electrochemical oxidation processes has became an important research direction.By Sol-Gel method a new type of DSA（Ti/SnO₂,Sb₂O₃/SnO₂,Sb₂O₃, RuO₂,Co₃O₄）with the nanocrystal surface and with gradient constitution been produced.Then the SEM and XRD pictures show the feasibility to produce this type of DSA by the method.The experiment of degradation of nitrobenzene has been taken in the two-dimensional device.The datas of the single factor experiments and orthogonal experiment show that the electrodes has a a strong adaptability about the initial concentration of nitrobenzene and give the best operating conditions to deal with the wastewater contains nitrobenzene:each square centimeter of the DSA been used to treat 12 mL wastewater,the current density is 10 mA/cm2, the initial pH=2.Under the best operating conditions and the initial concentration of nitrobenzene is 240mg/L,when electrifying 140 min the degradation rate reach at 98.11 percent,the power consumption is 5.83 KW·h.It means that at a correspondingly lower energy consumption the DSA can give excellent performance.And through the test it is found that the service life of the DSA is long.With GC-MS results,a mechanism of nitrobenzene degradation was preliminarily discussed:the deoxidization of the cathode also played an important role in the nitrobenzene degradation.

Phthalic acid esters（PAEs）are the most commnonly used plasticizer.Half of PAEs are environmental hormones,which have endocrine disruption character.The common used phthalates（dimethyl-,diethyl-,di-n-butyl-,di-n-octyl,butylbenzyl- and bis（2-ethylhexyl）-phthalates esters）have been included on the list of priority pollutants of the US Enviromental Protection Agency（EPA）.The removal performances of PAEs（DMP,DEP,DBP and DEHP）in water were analyzed, by using the UV/H₂O₂/O3 combination processes.With the initial concentrations lmg/L,the removal efficiencies of PAEs reached more than 60%under the condition that the intensity of radiation and the dosage of H₂O₂ and O₃ were 200w,60mg/L and 3g/h during 15min.When the reaction time last to 60min,their removal efficiencies all reached more than 98%.The permanganate index just decreased from 67.7mg/L to 61.1mg/L during 60min,and it decreased to 14.4mg/L after 60h.In（C₀/C_t）and t of the degradation of PAEs follow the stair kinetic equations by using UV/H₂O₂/O₃ combination processes.The slopes of those lines were degradation rates.It was concluded that the halflife of the PAEs were DMP:7.571min, DEP:3.600min,DBP:4.470min,DEHP:9.664min,which were degraded by the UV/H₂O₂/O₃ combination processes.Four of the PAEs were determined in the representative water samples in JiangSu province in the fourth quarter of 2007,and the concentrations were from undetected to 15μg/L. For the real water samples,it has a good performance to remove PAEs in water by the UV/H₂O₂/O₃ combination processes.All of the PAEs’ concentrations in surface water were under the limits of detection after 45min.During 180min,the permanganate index of the real water decreased from 4.47mg/L to 0.9412mg/L.The changes and reactions of DBP which is the most common and the highest concentration level in the real samples treated by the UV/H₂O₂/O₃ combination processes were studied.It was found that the intermediate products were monobutyl phthalate,dipropyl phthalate,DEP and methyl benzoate and the final product was benzoic acid.So the degradation mechanism and the possible degradation path of DBP were concluded,using the UV/H₂O₂/O₃ combination processes.The decrease of the permanganate index and the pH value were studied to prove the conclusion about the degradation mechanism and reaction course of DBP.The concentration level of benzoic acid in the real water samples was discussed when the degradation ended to evaluate whether the technology is safe or not.

Sanitary landfill is the main method for processing municipal landfill these days,but it will produce landfill leachate which is very harmful to our environment.The leachate is a kind of liquid which contains lots of toxic and nocuous inorganic and organic matters,its COD is very high while biodegradability（B/C）is low.Pollutant concentration of the landfill leachate used to change largely.If the landfill leachate is discharged into the environment,the soil and groundwater environment will be polluted severely. Currently,all of the processing craft in domestic and foreign are divided into three segments;the biological treatment is taken as the main body craft,the physical-chemical treatment and land method are taken as the pretreatment craft and the post-processing craft,respectively.The leachate used in this dissertation comes from Asuwei Municipal Wastes Sanitary Landfill which is located at Xiao Tangshan,Beijing.Firstly, the leachate is processed by ultrasonic technology or（and）Fenton reagent oxidation.It is found that effect of the degradation and B/C by ultrasonic technology or Fenton reagent oxidation alone is insignificant,while the great improvement can be achieved when the two processes combined,with shorter processing time and better result（with B/C rate up to 0.51）,which showed that the combination of these two processes presented better effect than each method alone.Then,the combination processing of ultrasound and Fenton is used. The influence of main factors to processing result is studied,these factors including ultrasonic power,initial pH,probe diameter,quantity of Fe²⁺and H₂O₂.The result shows that,the combination processing can get much better degradation than each method alone,but not prior to other Physic-chemical method.Experimental results indicated that the biodegradability decreased dramatically with the increasing of the initial pH; biodegradability will be increased with the increasing of the ultrasonic power,but at some level of power,the increasing of the probe diameter means the losing of ultrasounic energy,which will destroy ultrasounic cavitation and reduce its biodegradability;With the increasing of H₂O₂, biodegradability will also be increased,but when the magnitude of H₂O₂ is higher than 600 mg/l,the biodegradability will reduce a little;the same as H₂O₂.Fe²⁺will also benefit to biodegradability,but the increment will be reduced when Fe²⁺is higher than 10 mg/l.

5-hydroxymethylfurfural（5-HMF）and levulinic acid（LA）can be prepared from biomass.Many useful organic compounds derive from 5-HMF and LA,which are expected to be new platform chemicals.In the traditional way,5-HMF and LA are prepared through hydrolyzation of biomass,using sulfuric acid and hydrochloric acid as catalysts.Because of the strong toxicity and corrosivity of inorganic acids,some severe problems occur,for example the production of acidic waste solid and liquid and corrosion of the equipments.So what we are trying to do is to dissolve and degrade carbohydrates like glucose,fructose,sucrose and cellulose with green solvent-ionic liquids,consequently obtain high yield of 5-HMF and LA.Several ionic liquids,[bmim]C1,[bmim]Br,[ibmim]Br,[（CH₂）₄SO₃Hmim] [HSO₄],[（Et）₃NH][HSO₄]and[bmim][CF₃SO₃]were synthesized,[bmim]C1, [bmim]Br,[ibmim]Br,[（CH₂）₄SO₃Hmim][HSO₄],[（Et）₃NH][HSO₄],[Hbim][BF₄] and[Hbim][CF₃SO₃]were characterized by IR,¹HNMR,¹³CNMR in this thesis.These ionic liquids were put into use of dissolution and degradation of carbohydrates. [bmim]C1 dissolved cellulose best with the highest solubility 12 wt%,followed by [bmim]Br and[ibmim]Br with the solubility 7 wt%,while[Hbim][BF₄], [Hbim][CF₃SO₃],[bmim][CF₃SO₃],[（Et）₃NH][HSO₄],[（CH₂）₄SO₃Hmim][HSO₄] were almost insoluble to cellulose.Microwave heating could significantly improve the dissolution rate of cellulose and slightly enhance the solubility.[bmim]C1 could be recycled.LA was not obtained with degradation of cellulose only with ionic liquids. 3.45%yield of LA was reached when the temperature was 112℃,the weight ratio of triethylammonium sulfate and water was 2,weight of cellulose accounted for 4%of all the system and the reaction time was 30 hr.We also got the yield of 5-HMF respectively 47.2%,29.2%,19.3%from the degradation of fructose,glucose and sucrose with ionic liquids.

5-hydroxymethylfurfural（5-HMF）and levulinic acid（LA）can be prepared from biomass.Many useful organic compounds derive from 5-HMF and LA,which are expected to be new platform chemicals.In the traditional way,5-HMF and LA are prepared through hydrolyzation of biomass,using sulfuric acid and hydrochloric acid as catalysts.Because of the strong toxicity and corrosivity of inorganic acids,some severe problems occur,for example the production of acidic waste solid and liquid and corrosion of the equipments.So what we are trying to do is to dissolve and degrade carbohydrates like glucose,fructose,sucrose and cellulose with green solvent-ionic liquids,consequently obtain high yield of 5-HMF and LA.Several ionic liquids,[bmim]C1,[bmim]Br,[ibmim]Br,[（CH₂）₄SO₃Hmim] [HSO₄],[（Et）₃NH][HSO₄]and[bmim][CF₃SO₃]were synthesized,[bmim]C1, [bmim]Br,[ibmim]Br,[（CH₂）₄SO₃Hmim][HSO₄],[（Et）₃NH][HSO₄],[Hbim][BF₄] and[Hbim][CF₃SO₃]were characterized by IR,¹HNMR,¹³CNMR in this thesis.These ionic liquids were put into use of dissolution and degradation of carbohydrates. [bmim]C1 dissolved cellulose best with the highest solubility 12 wt%,followed by [bmim]Br and[ibmim]Br with the solubility 7 wt%,while[Hbim][BF₄], [Hbim][CF₃SO₃],[bmim][CF₃SO₃],[（Et）₃NH][HSO₄],[（CH₂）₄SO₃Hmim][HSO₄] were almost insoluble to cellulose.Microwave heating could significantly improve the dissolution rate of cellulose and slightly enhance the solubility.[bmim]C1 could be recycled.LA was not obtained with degradation of cellulose only with ionic liquids. 3.45%yield of LA was reached when the temperature was 112℃,the weight ratio of triethylammonium sulfate and water was 2,weight of cellulose accounted for 4%of all the system and the reaction time was 30 hr.We also got the yield of 5-HMF respectively 47.2%,29.2%,19.3%from the degradation of fructose,glucose and sucrose with ionic liquids.

With the rapid social and economic development, how to handle the municipal solid waste effectively has already become the focus problem to which the society and people pay close attention nowadays. Land filling is one of the primary methods for municipal solid waste disposal. The key technology of landfill is to ensure the hazards of MSW to be long-time closed in landfill to avoid surrounding environment pollution. Therefore, to design a stable and security landfill, it is important to know the mechanical properties of MSW and propose the method of determination of the mechanical properties of MSW, establish the constitutive model of China MSW. It is convenient to provide an important basis for the design &construction of landfill.The mechanical properties of MSW are key basis for stability analysis of landfill. Previous researchers study the MSW by two main ways, one is laboratory test, and the other is field test. The laboratory test includes direct shear test, compression without lateral, different size Triaxial Compression Test etc. The field test includes cone penetration test, standard penetration test & vane shear test. All above those, the most common method is Triaxial Compression Test.MSW has complicated constituents ,high heterogeneity, and contains a lot of organic matters. The range of particle size is large; the void ratio is changed with the depth and the duration of the landfill. The degradation changes with time and it can effect the particle size and void ratio of MSW. Particle size、void ratio and degradation are the main affecting parameters of the MSW.The principal tasks are as follows.(1) CD shear tests were conducted using medium-scale triaxial apparatus on MSW samples of similar gradation while deferent particle size, in order to research the size effect of MSW in Triaxial Compression Test.(2) MSW samples are simulated the compositions of MSW from Hangzhou Tianziling landfill in deferent void ratio. CD shear tests were conducted using medium-scale triaxial apparatus on these MSW samples to study the influence of void ratio to MSW.(3) Because the degradation of MSW is to long, it is difficult to obtain massive deep degradation MSW samples. Simulated materials were sampled and tested according to the characteristics of real old MSW and the results of triaxial tests. Research showed that it is feasible using simulated materials to investigate the characteristics of old MSW, Based on the simulated materials, CD shear tests were conducted by deferent degradation MSW samples. Attempt to research the influence of the degradation to MSW.(4) The Test data processing method is the bilinear strain hardening model, to further verification applicability and rationality of the bilinear strain hardening model.(5) The experiment study results could be used in solid liquid gas coupled model, and it lays a theoretical foundation for the numerical method of landfill stress and deformation analysis.

Pyrethroid pesticides,as the substitute for HCHs and DDTs,were widely used in agriculture,forestry,food safety and human health,and in turn played a vital role in increasing yield and income.However,recent studies pointed out that the pyrethroid residues had threat on human health and ecological security to a certain extent,implying that deep studies on the characteristics of the degradation and migration of pyrethroid pesticides in soil-plant systems and their effects on soil enzyme activity are of importance on agriculture and forestry production safety and human health.Little information is as yet available on the degradation characteristics of pyrethroid pesticides in different soil-plant systems and their effects on soil enzyme activity.The content of pyrethroid pesticides in the representative plants were therefore investigated in order to obtain an understanding of the residual characteristics of pyrethroid pesticides in plants of the typical hilly and plain area（Wutongqiao County） in Sichuan,which was a densely populated area in 2007,based on optimizing the method of pyrethroid pesticide measurement by gas chromatography. Meanwhile,the content of pyrethroid pesticides in nine soil-plant systems which included the combinations of alluvial soil,calcareous purple soil and acid purple with sponge （Acacia）,poplar（Populus spp） and maize（Zea mays L.） was measured to understand the degradation and migration characteristics of pyrethroid pesticides in different soil-plant systems,employing the methods of gas chromatography in combination with controlled environmental chambers and pot experiment.Furthermore,dynamics on the activities of polyphenol oxidase,dehydrogenase,urease and nitrate reductase in soils under nine soil-plant systems were measured in order to understand the effects of pyrethroid pesticides on soil microbial activity.The objectives of this study were to provide a scientific basis on the safe production for agriculture and forestry as well as ecological risk assessment on pyrethroid pesticides.The recovery rate varied from 95%to 89%and the extraction effect was ideal when the ratio of petroleum ether/acetone（V/V） was 1:1.The separation effect of RTX-5 column, N₂ for the carrier gas,and ECD detection was efficient,which the minimum of detection was 5×10^-10g,the minimum detection concentration was 0.012mg.kg^-1,the recovery rate varied from 85%to 105%,and the variation coefficient ranged from 2.5%to 3.4%, respectively.In addition,GC ECD detector could detect the residual pyrethroid pesticides in the soil and plant,and showed the characteristics of good repeatability,simple operation, and high sensitivity,accuracy and precision which could make the needs of residual pesticides detection.Among the studied 9 kinds of herbages,Hemarthria altissima had higher residual fenpropathrin and cyhalothrin which was 0.46mg.kg^-1 and 0.09mg.kg^-1,respectively. Meanwhile,Canna edulis,Astragalus sinicus and Cyclosrus parasiticus had higher contents of residual cypermethrin,deltamethrin and fenvalerate,which were 0.12mg.kg^-1, 0.38mg.kg^-1,and 0.07mg.kg^-1,respectively.Similarly,among the studied 7 shrubs and trees,Eucalyptus grandis had higher content of residual fenpropathrin which was 0.21mg.kg^-1,Populus adenopoda had higher contents of residual cypermethrin, deltamethrin and fenvalerate which were 0.33mg.kg^-1,0.71mg.kg^-1 and 0.26mg.kg^-1, respectively,while Vernicia fordii had higher content of residual cyhalothrin which was 0.11mg.kg^-1.Among the studied 8 vegetables,Solanum tuberosu had higher contents of residual fenpropathrin,cypermethrin and cyhalothrin and the corresponding values were 0.14mg.kg^-1,0.11mg.kg^-1 and 0.06mg.kg^-1,respectively.Glycine max and Cucurbita moschata had higher contents of residual deltamethrin fenvalerate,and the corresponding values were 0.27mg.kg^-1 and 0.08mg.kg^-1,respectively.The results of the cluster analysis indicated that cyhalothrin and fenvalerate had similar residual mechanisms in plants,while the residual mechanism on fenpropathrin in plants was different from other 4 pyrethroid pesticides.The residual pyrethroid pesticides in soils were strongly influenced by poplar tree which had higher accumulation capacity on the pyrethroid pesticides,while those were weak influenced by maize resulting from smaller accumulation capacity.The degradation rate of pyrethroid pesticides was higher in calcareous purple soil due to the alkaline condition was favorable for the degradation of pyrethroid pesticides in comparison with other soils.The contents of cypermethrin and deltamethrin in soils changed little over 105 days,while the contents of other pyrethroid pesticides in soils increased at first and thereafter decreased,depending on soil-plant systems.Soil types had significantly influenced on the ability of sponge tree to accumulate the pyrethroid pesticide,but not significantly influenced on the capacity of poplar tree.Pyrethroid pesticides had influenced the activities of polyphenol oxidase, dehydrogenase,urease and nitrate reductase in soils at different levels,depending on soil types,soil-plant systems and enzymes.The activity of polyphenol oxidase in soils varied with soil types,the short-term increase of pyrethroid pesticides in soils increased the activity of polyphenol oxidase in soils,while the long-term residual pyrethroid pesticides in soils inhibited the activity of polyphenol oxidase in soils.In short term,pyrethroid pesticides increased the activity of dehydrogenase in soils under the soil-sponge tree systems,but inhibited the activity of dehydrogenase in soils under the soil-poplar and soil-maize systems,while in long term,the effects of promotion or inhibition weakened. Alter 105 days of pyrethroid pesticides supply,the activity of urease in soil increased in different soil-plant systems except for calcareous purple soil-maize system.The pyrethroid content was positively correlated with the activity of nitrate reductase in alluvial soil and acid purple soil,and negatively with that in calcareous purple soil.Alter 105 days of pyrethroid pesticides supply,the activity nitrate reductase in acid purple soil increased.

The technology of high-voltage discharge plasma is a newly developed advanced oxidation technology of removing hazardous organic compounds from waste water. It relates to a wide range of disciplines such as plasma physics, plasma chemistry, hydro-mechanics, thermodynamics, kinetics, high-voltage technology, and environ- mental engineering. The plasma degradation processes the synergistic effects of many water treatment technologies such as high temperature pyrolysis, photochemical oxidation, liquid electric cavitation degradation, superciritical water oxidation, and ozonization. Nonthermal plasma is produced during the discharge processes where a large amount of high energy electrons, active species （such as active radicals and molecules etc） are generated. Those active species directly react with organic molecules dissolved in water and oxidize them or even get them completely mineralized. It does not cause secondary pollution in treatment. It is one of the potentially applicable wastewater treatment technologies for treating refractory organic pollutants wastewaters such as papermaking wastewater, pharmaceutical wastewater and dyeing wastewater, the pollute water resource severely.The experiments of producing of H₂O₂ and O₃ by pulsed high voltage discharge in water were carried out by meants of a lab-made apparatus with two electrodes of needle and pipe shape. The effect of some conditions, such as the distance of electrodes, the voltage, the discharge time, the styles of water treatments and the exposed treatments on the producing of H₂O₂ and O₃ were studied. The results showed out that the distance of electrodes and the discharge time have a marked influence on the H₂O₂ and O₃ concentrations in water, but little effect of the discharge voltage and the discharge time. When the air was blowed into the water in the process of high voltage, the anions , NO₂^- and NO₃^-were produced and the pH valuce of water decreased, while the conductivity increased.Degradation rate of 95.2% for methyl red was obtained after discharge of 120 min at 30 kV of peak voltage, 150 Hz of fiequency and 2 mm of distance in needle-pipe continuous reactor with bubbling gas. Wastewater of methyl red was treated by discharge plasma and the pH valuce of water decreased therewith the conductivity increased. The study is indicative that the aeration, pH and conductivity affect the degradation. Higher aeration, lower original pH valuce and lower conductivity can improve degradation rate. FT-IR and Gas Chromatogram-Mass Spectrum were used to monitor the degradation process and to identify the major oxidation intermediates. The mechanisms of the degradation are proposed on the basis of detected intermediates. The methyl red degradation in the system is due to radical reaction and one of the structure destruction was induced by the break of the azo bond.The discharge degradation of phenol wastewater by was also studied in this article. Degradation rate of 91.2% for paranitrophenol was obtained after 120 min discharge at 30 kV of peak voltage, 150 Hz of fiequency and 2 mm of distance in needle- pipe continuous reactor with bubbling gas. The study shows original concentration, pH value, conductivity affect the degradation. Lower original concentration, original pH value and conductivity can improve degradation rate. FT-IR, High Performance Liquid Chromatography and LC/MS were also used to monitor the degradation process and to identify the major oxidation intermediates. The mechcanism of degradation of them are proposed on the basis of detection of intermediates. The activity of paranitrophenol is attacked and permuted by hydroxyl radical and the quinine was detected then.

The technology of high-voltage discharge plasma is a newly developed advanced oxidation technology of removing hazardous organic compounds from waste water. It relates to a wide range of disciplines such as plasma physics, plasma chemistry, hydro-mechanics, thermodynamics, kinetics, high-voltage technology, and environ- mental engineering. The plasma degradation processes the synergistic effects of many water treatment technologies such as high temperature pyrolysis, photochemical oxidation, liquid electric cavitation degradation, superciritical water oxidation, and ozonization. Nonthermal plasma is produced during the discharge processes where a large amount of high energy electrons, active species （such as active radicals and molecules etc） are generated. Those active species directly react with organic molecules dissolved in water and oxidize them or even get them completely mineralized. It does not cause secondary pollution in treatment. It is one of the potentially applicable wastewater treatment technologies for treating refractory organic pollutants wastewaters such as papermaking wastewater, pharmaceutical wastewater and dyeing wastewater, the pollute water resource severely.The experiments of producing of H₂O₂ and O₃ by pulsed high voltage discharge in water were carried out by meants of a lab-made apparatus with two electrodes of needle and pipe shape. The effect of some conditions, such as the distance of electrodes, the voltage, the discharge time, the styles of water treatments and the exposed treatments on the producing of H₂O₂ and O₃ were studied. The results showed out that the distance of electrodes and the discharge time have a marked influence on the H₂O₂ and O₃ concentrations in water, but little effect of the discharge voltage and the discharge time. When the air was blowed into the water in the process of high voltage, the anions , NO₂^- and NO₃^-were produced and the pH valuce of water decreased, while the conductivity increased.Degradation rate of 95.2% for methyl red was obtained after discharge of 120 min at 30 kV of peak voltage, 150 Hz of fiequency and 2 mm of distance in needle-pipe continuous reactor with bubbling gas. Wastewater of methyl red was treated by discharge plasma and the pH valuce of water decreased therewith the conductivity increased. The study is indicative that the aeration, pH and conductivity affect the degradation. Higher aeration, lower original pH valuce and lower conductivity can improve degradation rate. FT-IR and Gas Chromatogram-Mass Spectrum were used to monitor the degradation process and to identify the major oxidation intermediates. The mechanisms of the degradation are proposed on the basis of detected intermediates. The methyl red degradation in the system is due to radical reaction and one of the structure destruction was induced by the break of the azo bond.The discharge degradation of phenol wastewater by was also studied in this article. Degradation rate of 91.2% for paranitrophenol was obtained after 120 min discharge at 30 kV of peak voltage, 150 Hz of fiequency and 2 mm of distance in needle- pipe continuous reactor with bubbling gas. The study shows original concentration, pH value, conductivity affect the degradation. Lower original concentration, original pH value and conductivity can improve degradation rate. FT-IR, High Performance Liquid Chromatography and LC/MS were also used to monitor the degradation process and to identify the major oxidation intermediates. The mechcanism of degradation of them are proposed on the basis of detection of intermediates. The activity of paranitrophenol is attacked and permuted by hydroxyl radical and the quinine was detected then.