This paper introduces the preparation, properties and its application in the treatment of drinking water of potassium ferrate.

This paper is concerned with the category of the batteries, the harm of used batteries to the environment, the trend of the development of battery industry, and the regeneration and utilization of used batteries at home and abroad. Some advices to the recovery of used batteries were given.

As a new edulcorant,xylitol has been widely used. The physical and chemical properties,medical value and the process of production of xylitol are given in this paper.

At present, more than 200 kinds of pesticides are produced in China and their annual output reaches 300,000 tons, of which the organophosphorus pesticide covers 80%.This paper introduces the structure, hazard and hazard-mechanism of the organophosphorus pesticides, and explains their degradation and transformation in the environment.

This paper reviews the progress in the studies on aromaticity, involving the concept of aromaticity as well as the criterion of aromaticity. With the rapid developments of quantum theory and synthesis of new aromatic compounds, the meaning of aromaticity is deepening and developing, and the field of application of aromatic compounds is also expanding.

At present, chemical experiment research in middle schools can be assorted into three types referring to three core journals on chemical education in middle school, such as theory research, summary of experience or application of theory，and design and improvement of experiment. It indicates that experiment design for new course is not enough, and methodological level is low though experiment design is allaround. Approach that resolves these problems is to strengthen the theoretical research of experiment design, to update the education ideas of teachers on front line and to upgrade the level of experiment design of teachers in middle schools.