4篇
您的检索式：作者名="Yuan Chengwu"
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| 1 | An experimental study exploring the influencing factors for ultrasonic-assisted extraction of flavonoid compounds from leaves of Amorpha fruticosa L.显示文摘In this paper,the ultrasonic-assisted extraction process of flavonoid compounds from leaves of Amorpha fruticosa is optimized.In single factor experiments,solid/liquid ratios,ultrasonic power,ethanol concentrations and extraction cycles were experimental factors.Box–Behnken central composite design and RSM analyzed the effects of the four factors on the yield of total flavonoids.The optimal extraction parameters were solid/liquid ratio 1:50 g/mL,ultrasonic power 316 W,ethanol concentration 50%,4 extraction cycles.In the optimized condition,the estimated value of the regression model was 66.6456 mg/g while the measured value was 66.4329 mg/g. | Jingyao Tian Siddique Muhammad Ai Chen Peng Chen Jinghong Wang Chengwu Yang Hui Yuan Zhensheng Wang | 2019 | Journal of Forestry Research2019，30，5： | 14 |
| 2 | Degradation of organic contaminants through the activation of oxygen using zero valent copper coupled with sodium tripolyphosphate under neutral conditions显示文摘In this study,sodium tripolyphosphate(STPP)was used to promote the removal of organic pollutants in a zero-valent copper(ZVC)/O2 system under neutral conditions for the first time.20 mg/L p-nitrophenol(PNP)can be completely decomposed within 120 min in the ZVC/O2/STPP system.The PNP degradation process followed pseudo-first-order kinetics and the degradation rate of PNP gradually increased upon the decreasing ZVC particle size.The optimal pH of the reaction system was 5.0.Our mechanism investigation showed that Cu+generated by ZVC corrosion was the main reducing agent for the activation of 02 to produce ROS.-OH was identified as the only ROS formed during the degradation of PNP and its production pathway was the double-electron activation of O2(O2→H2 O2→·OH).In this process,STPP did not only promote the release of Cu+through its complexation,but also promoted the production of OH by reducing the redox potential of Cu2+/Cu+.In addition,we could initiate and terminate the reaction by controlling the pH.At pH<8.1,ZVC/02/STPP could continuously degrade organic pollutants;at pH>8.1,the reaction was terminated.STPP was recycled to continuously promote the corrosion of ZVC and O2 activation as long as the pH was<8.1.This study provided a new and efficient way for O2 activation and organic contaminants removal. | Chengwu Zhang Lishuang Xuan Jingyi Zhang Fang Yuan Xianglong Kong Chuanyu Qin | 2020 | Journal of Environmental Sciences2020，32，4： | 2 |
| 3 | Assessment of the re- covery and front contrast of CO2 EOR and sequestration in a new gas condensate reservoir by compositional simulation and seismic modeling显示文摘 | Yuan Chengwu Zhang Zhong Liu Kaijian | 2015 | Fuel2015，142，1： | 1 |
| 4 | Simultaneous Detection of Phenols and Anilines in Oilfield Waste Water显示文摘SimultaneousDetectionofPhenolsandAnilinesinOilfieldWasteWaterYuanCunguangandFengChengwu(ChemicalEngineeringDepartment,Univers... | Yuan Cunguang and Feng Chengwu(Chemical Engineering Department, University of Petroleum, Dongying) | 1996 | China Oil & Gas1996，3，4： | 0 |
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