研究辽河水体中磷元素的迁移转化,营养物质的结构与组成,分析辽河沉积物-水界面磷的类型,影响磷元素含量的因素和产生富营养化的原因,系统概括了磷元素迁移转化的规律。

In order to prove the effect of using ultrasonic – photocatalysis to deal with the chemical pollutants in water,the photocatalysis oxidation method and the ultrasonic oxidation method were used together to deal with phenol.The degradation effects of the three degradation systems were compared and the factors of pH,catalyst and time,which can affect the degradation efficiency of the ultrasonic – photocatalysis method,were analyzed to seek the suitable conditions for degradation of phenol with ultrasound – photocatalysis.The study results indicate that the degradation rate of ultrasonic – photocatalysis is higher than that of a single method,ultrasonic or photocatalysis and when the pH is between 6.0 and 7.0,the dosage of catalyst is 0.4 gram and the time is 2 hours,the degradation effect of phenol is the best.

There are a lot of questions in electromechanical management in both large-scale state-run enterprise and private contracting enterprise of coal mining enterprise of our country at present, the current situation of this text to electromechanical equipment management of coal mining enterprise of our country is analysed , have managed and got some countermeasures including equipment purchase out of to the electromechanical equipment, maintains the installation and equipment to renovate and manage.