Use of Landfarming to Remediate Soil Contaminated by Pesticide Waste

摘要

This project tested the effectiveness and environmental safety of landfarming by using 30 m2 plots outfitted for collection of runoff and leachate. Degradation and phytotoxicity of herbicides following landfarming of waste-contaminated soil (=landfarmed plots) was compared to degradation and phytotoxicity of the same compounds following spraying (=sprayed plots). The landfarmed soil and contained alachlor, trifluralin, atrazine, and metolachlor. Three rates of application, were made based on a nominal 1X, 5X, and 10X rate of alachlor application, which was the most prevalent herbicide contaminant. Herbicide residues in landfarmed plots degraded at a similar rate to residues in sprayed plots within the first 100 days after application, but degradation slowed appreciably thereafter.