| Abstrakt: |
Glyphosate, a highly toxic pesticide, is potentially harmful to the environment and human health. Applying biochar has proven to effectively reduce the glyphosate content in environment. In this study, biochar was prepared from pig manure and modified with thiourea to study the adsorption behavior of glyphosate from soil. The effects of environmental factors, such as pH and dissolved organic carbon, on the above sorption characteristics also were studied. The results showed that modification of biochar with thiourea can improve the adsorption capacity of biochar to glyphosate from soil. Moreover, the best adsorption performance was obtained for raw biochar under acidic condition, while the best adsorption best adsorption behavior was found for modified biochar under alkaline condition. The equilibrium isotherm data fitted well with the Freundlich and Langmuir models suggesting that the glyphosate adsorption was a complex adsorption process including physical adsorption and chemical adsorption. This study provides an economical and environmentally friendly technical means for the management of organic matter in the environment. [ABSTRACT FROM AUTHOR] |
