Risk Assessment of Health Effects Accompanied with Run-off of Pesticides from Agricultural Land and Its Control

点击翻译按钮获取中文摘要

The amount of synthetic chemicals which are used in agriculture have been increased year by year. It has been reported the occurrence of synthetic chemicals, particularly pesticides, in drinking water. However, the information of the behavior of them their degenerates, their biological effects including human health risks are scarce. Therefore it is very difficult to implement health risk assessment and management in ambient water but also drinking water. We conducted the survey on the behaviors of pesticides and their generates in ambient water and drinking water production system in order to assess health risks accompanied with run-off of pesticides from agricultural land and find its control measure.Herbicides and pesticides such s DDVP and diazinon in river water in Kasumigaura Basin were detected as ppb levels in the period of May-June and September-October. 0.29% of total applied CNP and 3% of total applied simetorin were discharged into the public water area from rice fields.The conventional water purification system composed by coagulation, sedimentation, and sand filtration processes could not be expected its potential to remove pesticides in raw water. It was showe that the advanced water purification system composed by the conventional water purification system and ozonation and granular activated carbon filter could remove most of pesticides excluding those have a high solubility such as simazine in raw water.