在自行设计的微波激发无极紫外灯光氧化反应器和内电解反应器联用体系中,以次氯酸钠为氧化剂,对质量浓度为0.4g/L的C.I.Reactive Blue 194(活性深兰M-2GE)染料废水进行处理。结果表明,氧化剂的投加量为4.6 g/L、微波紫外光反应器中反应...在自行设计的微波激发无极紫外灯光氧化反应器和内电解反应器联用体系中,以次氯酸钠为氧化剂,对质量浓度为0.4g/L的C.I.Reactive Blue 194(活性深兰M-2GE)染料废水进行处理。结果表明,氧化剂的投加量为4.6 g/L、微波紫外光反应器中反应时间30min、铁炭床微电解反应总时间50min时,脱色率、CODCr去除率可分别达到98%、75%的处理效果。展开更多
Unlike the pier scour in bridge waterways,the local scour at offshore monopile foundations should take into account the effect of wave-current combination.Under the condition of wave-current coexistence,the water-soil...Unlike the pier scour in bridge waterways,the local scour at offshore monopile foundations should take into account the effect of wave-current combination.Under the condition of wave-current coexistence,the water-soil interfacial scouring is usually coupled with the pore-pressure dynamics inside of the seabed.The aforementioned wave/current-pile-soil coupling process was physically modeled with a specially designed flow-structure-soil interaction flume.Experimental results indicate that superimposing a current onto the waves obviously changes the pore-pressure and the flow velocity at the bed around the pile.The concomitance of horseshoe vortex and local scour hole around a monopile proves that the horseshoe vortex is one of the main controlling mechanisms for scouring development under the combined waves and current.Based on similarity analyses,an average-velocity based Froude number(Fra)is proposed to correlate with the equilibrium scour depth(S/D)at offshore monopile foundation in the combined waves and current.An empirical expression for the correlation between S/D and Fra is given for predicting equilibrium scour depth,which may provide a guide for offshore engineering practice.展开更多
文摘在自行设计的微波激发无极紫外灯光氧化反应器和内电解反应器联用体系中,以次氯酸钠为氧化剂,对质量浓度为0.4g/L的C.I.Reactive Blue 194(活性深兰M-2GE)染料废水进行处理。结果表明,氧化剂的投加量为4.6 g/L、微波紫外光反应器中反应时间30min、铁炭床微电解反应总时间50min时,脱色率、CODCr去除率可分别达到98%、75%的处理效果。
基金supported by the National Natural Science Foundation of China(Grant Nos.1123201210872198)the National Basic Research Program of China("973"Project)(Grant No.2014CB046204)
文摘Unlike the pier scour in bridge waterways,the local scour at offshore monopile foundations should take into account the effect of wave-current combination.Under the condition of wave-current coexistence,the water-soil interfacial scouring is usually coupled with the pore-pressure dynamics inside of the seabed.The aforementioned wave/current-pile-soil coupling process was physically modeled with a specially designed flow-structure-soil interaction flume.Experimental results indicate that superimposing a current onto the waves obviously changes the pore-pressure and the flow velocity at the bed around the pile.The concomitance of horseshoe vortex and local scour hole around a monopile proves that the horseshoe vortex is one of the main controlling mechanisms for scouring development under the combined waves and current.Based on similarity analyses,an average-velocity based Froude number(Fra)is proposed to correlate with the equilibrium scour depth(S/D)at offshore monopile foundation in the combined waves and current.An empirical expression for the correlation between S/D and Fra is given for predicting equilibrium scour depth,which may provide a guide for offshore engineering practice.
