Treatment of UDMH Waste Water by Microwave Catalytic Oxidation Process

2013 ◽  
Vol 295-298 ◽  
pp. 1486-1489 ◽  
Author(s):  
Xiao Li Gou ◽  
Xiao Meng Lv ◽  
Hu Cui ◽  
Xia Li
Keyword(s):  
Waste Water ◽  
Activated Carbon ◽  
Catalytic Oxidation ◽  
Microwave Power ◽  
Degradation Rate ◽  
Oxidation Process ◽  
Irradiation Time

The paper give the method of microwave catalytic oxidation process to treat UDMH waste water. The effects of microwave power, irradiation time, H2O2 dosage and activated carbon dosage on the degradation rate of UDMH were examined. Under the conditions of microwave power 490W, irradiation time 9min, H2O2 dosage 1mL and activated carbon dosage 1g per 100ml UDMH sewage, the degradation rate of UDMH is over 97%. The method is effective by experiments, which will be the new way to treat the UDMH waste water.

Internal Electrolysis Intensified by Microwave for the Treatment of Nitrobenzene – Containing Wastewater

2013 ◽  
Vol 641-642 ◽  
pp. 178-182
Author(s):  
Zheng Yang An ◽  
Yuan Yuan Wang ◽  
Xiao Jun Xu
Keyword(s):  
Activated Carbon ◽  
Microwave Power ◽  
Irradiation Time ◽  
Degradation Mechanism ◽  
Experimental Results ◽  
Molar Ratio ◽  
Removal Rates ◽  
Internal Electrolysis

Treatment of nitrobenzene-containing wastewater was carried out by iron-carbon internal electrolysis and microwave and its degradation mechanism was investigated. The parameters is found in the process of treating nitrobenzene-containing wastewater. The experimental results showed that the microwave intensified the internal electrolysis effect of iron-carbon and the existence of iron was beneficial to the regeneration of activated carbon. Under the optimized electrolysis conditions as follows: iron dosage was 175g, molar ratio of Fe to C was 3, pH was 3, microwave power was 640W, irradiation time was 4 min and aeration amount was 2.5L/min, the removal rates of CODcr, chroma and turbidity were 94.7 %, 95.6 % and 90.3 %, respectively.

Research on the Regeneration of Modified Activated Carbon Containing 2,4,6-TCP by Microwave Irradiation

2014 ◽  
Vol 1033-1034 ◽  
pp. 1358-1361
Author(s):  
Min Wang ◽  
Xiang Lian Wang ◽  
Gui Qing Gao
Keyword(s):  
Activated Carbon ◽  
Microwave Irradiation ◽  
Microwave Power ◽  
Irradiation Time ◽  
Adsorption Volume ◽  
Modified Activated Carbon ◽  
Microwave Regeneration ◽  
Loading Amount ◽  
Power Microwave

Microwave regeneration research has been conducted for the modified activated carbon (MAC) which has adsorbed 2,4,6-TCP. The effects of microwave power, microwave irradiation time and MAC loading amount for regeneration are studied.The results show that, at the beginning, the adsorption volume increases with the increase of the microwave power. However, when the power is over 450w, the adsorption volume begins to fall. The adsorption volume increases with the irradiation time,rises to its peak when irradiated for 6 minutes.The adsorption volume increases with the loading amount and rises to its peak when the amount is 5g.

Study on Microwave Combined with Granular Active Carbon for Treatment of P-Nitrophenol Wastewater

2012 ◽  
Vol 602-604 ◽  
pp. 2287-2290
Author(s):  
Dong Yuan ◽  
Da You Fu ◽  
Zhi Wen Luo
Keyword(s):  
Active Carbon ◽  
Microwave Power ◽  
Degradation Rate ◽  
Irradiation Time ◽  
Initial Concentration ◽  
Effective Factors ◽  
Microwave Technique ◽  
Removal Ratio ◽  
Granular Active Carbon ◽  
Organic Wastewater

A microwave technique assisted with granular active carbon(GAC) was used for the degradation of p-nitrophenol(PNP) wastewater. The effective factors such as the initial concentration of PNPl, active carbon dosage, microwave power and irradiation time on the degradation rate were studied. When the concentration of PNP was 200 mg/L, active carbon dosage was 6 g/L, microwave power was 500 W, and irradiation time was 8 min, the removal ratio of PNP reached 99. 03%. The concentration o f PNP could be decreased to be low 2 mg /L, which satisfied with the national first degree let out level. The results show that the technology can be a practical and effective method for treating PNP organic wastewater.

Treatment of Imidacloprid Pesticide Wastewater by Microwave-Assisted Catalytic Oxidation

2012 ◽  
Vol 610-613 ◽  
pp. 2023-2027 ◽  
Author(s):  
Xiao Yi Bi ◽  
Hai Yan Yang ◽  
Pei Shi Sun ◽  
Xiao Yi Xu
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Catalytic Oxidation ◽  
Working Conditions ◽  
Ph Value ◽  
Irradiation Time ◽  
Removal Rate ◽  
Microwave Assisted ◽  
Cod Removal Rate ◽  
Carbon Catalysts

In this study, modified activated carbon used as catalysts treat imidacloprid pesticide wastewater with microwave-assisted catalytic oxidation. The effect of working conditions such as hydrogen peroxide concentration, homogeneous catalysts concentration of Fe2+, amount of activated carbon catalysts, microwave power, irradiation time, wastewater temperature, and pH value on the treatment of imidacloprid pesticide wastewater in the process was investigated. The results show that COD removal rate , can reach 89.25%, with the following working conditions : imidacloprid pesticide wastewater with initial concentration of 268mg/ L , 100 mL ; hydrogen peroxide solution added at a concentration of 26.52g/L , Fe2+ concentration ,109.81mg/L; amount of activated carbon catalysts, 5g;power of microwave , 119 W; irradiation time , 4min ; pH value , 6.

Treatment Investigation on Retting Hemp Waste Water with the Synergy of Activated Carbon and Microwave

2013 ◽  
Vol 634-638 ◽  
pp. 321-325
Author(s):  
Rong Yang ◽  
Quan Li Feng ◽  
Yu Jia ◽  
Chun Mei Shi
Keyword(s):  
Waste Water ◽  
Experimental Investigation ◽  
Activated Carbon ◽  
Microwave Radiation ◽  
Ph Value ◽  
Irradiation Time ◽  
Radiation Power ◽  
Experimental Results ◽  
Water Volume ◽  
Initial Ph

Treatment of retting hemp waste water was made by the synergy of activated carbon and microwave in this experimental investigation, and the four factors that influenced the experimental results were considered in which there were respectively the material ratio of activated carbon dosage and retting hemp waste water volume, microwave radiation power, microwave radiation time and the initial pH value of retting hemp waste water. The experimental results showed that, while the material ratio was 7:50 (i.e., the quality of activated carbon was 7g as the volume of retting hemp waste water was 50mL), the microwave radiation power and the microwave irradiation time were respectively 320W and 13min, and the initial pH value of retting hemp waste water was just 2, the treatment effect of retting hemp waste water was best in this experimental investigation.

scholarly journals Effects of microwave irradiation on the moisture content of various wood chip fractions obtained from different tree species

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Monika Aniszewska ◽  
Krzysztof Słowiński ◽  
Ewa Tulska ◽  
Witold Zychowicz
Keyword(s):  
Moisture Content ◽  
Microwave Irradiation ◽  
Microwave Power ◽  
Irradiation Time ◽  
Initial Moisture Content ◽  
Radiant Energy ◽  
Wood Chip ◽  
Wood Chips ◽  
Chip Size ◽  
Drying Rates

AbstractThe paper proposes the use of microwave irradiation to lower the initial moisture content of wood chips. The study involved willow and fir chips fractionated by means of a sieve separator and unfractionated ash chips. The wood chips were exposed to a constant microwave power of 800 W for 30 s, 60 s, 120 s and 180 s. The chips were weighed before and after irradiation to measure loss of moisture. It was found that the decline in moisture content increased with wood chip size for a given irradiation time and microwave power. The initial moisture content of wood chips was not found to significantly affect loss of moisture as the drying rates of wood chips with higher and lower moisture content exposed to microwaves were not statistically different. The results showed that irradiation intensity increased with the time of exposure to microwaves and unit radiant energy per unit of evaporated moisture decreased with increasing wood chip size in the 3.15–31.50 mm range.

Phenolic Wastewater Treatment by Microwave-Induced H2O2-Fe (III)-Cu (II)/γ-Al2O3 Catalytic Oxidation Process

2013 ◽  
Vol 777 ◽  
pp. 101-105
Author(s):  
Jie Zhang ◽  
Wei Qian Pan ◽  
Tong Zheng ◽  
Peng Wang
Keyword(s):  
Catalytic Oxidation ◽  
Oxidation Process ◽  
Synthetic Wastewater ◽  
Reaction Rate Constants ◽  
Toc Removal ◽  
First Order Kinetics ◽  
Phenolic Pollutants ◽  
Phenolic Wastewater ◽  
Ph Range ◽  
Induction Stage

To achieve efficient removal of phenolic pollutants in water, the catalyst of Fe (III)-Cu (II)/γ-Al2O3 was prepared. In the presence of Fe (III)-Cu (II)/γ-Al2O3, microwave-induced hydrogen peroxide (H2O2) catalytic oxidation process was conducted for the treatment of synthetic wastewater containing PNP, a representative of phenolic pollutants. Effectiveness of the process and factors influencing PNP removal were investigated and results showed microwave-induced H2O2-Fe (III)-Cu (II)/γ-Al2O3 process could achieve 99.41% PNP removal percentage, corresponding to 77.9% TOC removal in a given condition. The process remained effective in the 2-8 pH range with high reusability of Fe (III)-Cu (II)/γ-Al2O3 catalyst. The kinetics study showed microwave-induced H2O2-Fe (III)-Cu (II)/γ-Al2O3 process could be divided into microwave induction stage and catalytic oxidation stage, both of which fitted first-order kinetics, with reaction rate constants of 0.0453 min-1 and 4.7552 min-1 respectively.

scholarly journals Catalytic Oxidation of 4-Hydroxybenzoic Acid on Activated Carbon in Batch Autoclave and Fixed-Bed Reactors

2007 ◽  
Vol 46 (25) ◽  
pp. 8388-8396 ◽  
Author(s):  
Carmen Creanga Manole ◽  
Carine Julcour-Lebigue ◽  
Anne-Marie Wilhelm ◽  
Henri Delmas
Keyword(s):  
Activated Carbon ◽  
Catalytic Oxidation ◽  
Fixed Bed ◽  
Hydroxybenzoic Acid ◽  
Fixed Bed Reactors
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