STUDIES ON IMPROVING THE QUALITY OF DRINKING WATER IN AN AGRICULTURAL DISTRICT WITH A SPECIAL REFERENCE TO A METHOD TO REMOVE AGRICULTURAL CHEMICALS

Abstract

Agricultural chemicals will be mixed in underground and surface water by penetration farms sprinkling in the air or on the ground, sewer, waste water and the like. It is said that organic agricultural chemicals will be gradually resolved chemically or biologically in the water, or adhered to suspension, but they surely remain for a comparatively long period. If those organic agricultural chemicals would remain for a long period and would deteriorate the water quality, some special treatment for water quality is inevitably necessary. However, there has been few studies on this matter. The present investigation was undertaken to remove agricultural chemicals. Satisfactory results were realized by use of powder active carbon only between two glass fibre plates in the filter and of MF filter medium. Especially the MF filter medium containing 77.2% aragonite calcium carbonate completely eliminated parathion and PCP under 1.22 ppm concentration.