| abstract |
The invention relates to a method for purifying water of pesticides and their decomposition products, and in particular to water intended to be used for human consumption or in food production. The method consists in carrying out the purification with a view to removing pesticides having a Log P value (distribution coefficient in a two-phase system of octanol-water) which is > 1.5, contacting the water with a hydrophobic zeolite which has the composition [(AlO2)x(SiO2)y], wherein x and y are integers and y/x > 15, and which is directly synthesised as a hydrophobic zeolite or obtained by treating the corresponding hydrophilic zeolite in cationic form, in particular alkali metal form, preferably Na form, by means of at least two sequences of ion exchange-calcination for conversion to a hydrophobic zeolite and carrying out the purification until a total concentration of pesticides present in the water of not more than 0.5 νg/l. |