By adding such anti-redeposition Agents as CMC,PVP,PVA into two nonphospate powder detergent respectively and determining the spectrum reflecting ratio of soiled cloth and unsoiled cloth before and after washing tests and cycle of washing tests, the anti - redeposition effect of each agent was studied.

The object of the paper is MC-LR, the research was carried out successfully which included analytical method, extraction and purification, identification and the removal experiment with UV、O3 and UV/O3 three techniques.

According to the investigation into the present situation of pollution caused by the middle school chemistry experiment,we put forward the processing methods of each kind of waste liquid which is produced in the experiments and the preventing and controlling measures of the experiment pollution.