Research Of The Natural Nanomaterials Control Pesticide Molecular Loss Function

Dispersion of nanomaterials could influence their functions and suspending capacity in aqueous solution,which could further affect their applications.Therefore improving the dispersion of nanomaterials was rather significant.The dispersion of attapulgite(ATP)as ananorod-like single crystals is crucial to fully develop its functionality of one-dimensional nanometer as adsorbent.But,the instrinsic existence form of attapulgite as aggregates or bundles effaces its nanometer characteristic.Herein,to enhance the dispersion of attapulgite,a kind of naturally aggregated nanoclay,straw ash-based biochar and biosilica(BCS)with micro/nano porous structure was added to ATP suspension under ultrasonic processing to form ATP-BCS nanocomposites.This approach could effectively decrease the particle size of originally aggregated ATP through steric hindrance effect of BCS and cavitation effect of ultrasound,resulting in a significant improvement of the dispersion and suspension capacity of ATP.Canning electron microscopy(SEM),fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),dynamic light scattering(DLS),Zeta potential and energy dispersive X-ray spectroscopy(EDX)techniques were applied to characterize the modified ATP and the prepared composites.According to DLS and Zeta potential,the BCS could disperse ATP into smaller bunches or single rods through stereo-hindrance effect under ultrasonic treated.XRD,SEM and FTIR indicating that ATP was successfully combined with BCS by hydrogen bonds or physical interaction.The risk of surface and ground water contamination resulting from rapid leaching and runoff of highly mobile pesticides.Therefore,how to enhance the efficacy of pesticides and minimize their pollution is always an important issue in both agricultural and environmental.For this purpose,the ATP-BCS and BCS were added into pesticide to act as matrix or carriers for control loss of pesticides named loss-control chlorpyrifos(LCC).The results suggest ATP-BCS and BCS could effectively improve the adhesion of pesticide,so that the loss of pesticide could be reduced and the pollution risk of pesticide could be lowered.