Adsorption Behavior and Residue Degradation of Triazine Herbicides in Soil Amended with Rice Straw Biochar

The removal of or decrease in pesticide residues soil has attracted considerable attention, due to the serious pollution pesticides soil. purpose study was explore adsorption behavior biochar on and impact degradation soil, providing a basis for remediation by biochar. Biochars were prepared via pyrolysis rice straw at high temperature (300 °C, 400 500 600 °C). individual competitive three triazine herbicides, prometryn, atrazine, simazine, investigated, herbicide biochar-added determined. selected herbicides presented similar characteristics biochar, amount adsorbed increased with higher preparation studied simultaneously, decreased as follows: simazine > atrazine prometryn. competition lower affinity than that when they are individually. isotherm best fitted Freundlich model. half-lives 9.8~12.6 d, 5.2~8.1 3.7~5.6 respectively. Biochar addition evaluated could be potential sorbents can implemented pesticides.