Influence of Pyrolysis Parameters Using Microwave toward Structural Properties of ZnO/CNS Intermediate and Application of ZnCr2O4/CNS Final Product for Dark Degradation of Pesticide in Wet Paddy Soil

Pesticide is a pollution problem in agriculture. The usage of ZnCr2O4/CNS and H2O2 as additive liquid fertilizer has potency for catalytic pesticide degradation. Colloid condition needed easy spraying. Rice husk sawdust were used carbon precursor ZnCl2 activator. biomass–ZnCl2 mixtures pyrolyzed using microwave (400–800 W, 50 min). products dispersed water by blending then evaporated to obtain ZnO/CNS. composites reacted with KOH, CrCl3·6H2O, more ZnCl2, little (600 5 degradation buthylphenylmethyl carbamate (BPMC) wet deactivated paddy soil. TOC was measured meter. FTIR spectra the ZnO/CNS indicated completed carbonization except at 800 W without ZnCl2. X-ray diffractograms confirmed structure. SEM images showed irregular particle shapes both biomass. structure XRD final product crystallite size 74.99 nm. produced stable colloids CNS composite than rice husk. pyrolysis formed colloid from gave better dark BPMC husk, i.e., 2.5 1.6 times larger 400 pyrolysis, respectively.