Preparation and performance of acetaniprid-lignin quaternary ammonium salt-bentonite slow release formulation.

In order to increase the added value of lignin products, bentonites with different loading dosages of lignin quaternary ammonium salt (LQAS) were synthesized with sodium-based bentonite as the raw material and LQAS as the modification agent. The morphological structure of bentonite was modified by FTIR, and the basal spacing of modified bentonite was analyzed with XRD. Acetaniprid was selected as the research object for release, and the modified bentonite as main carrier for the release. Acetaniprid slow-release formulation was prepared by means of leaching and adsorption, and its performance was studied. The results showed that with the increase of LQAS dosage, the adsorption capacity of acetaniprid in modified bentonite first increased and then decreased. The adsorption effect of modified bentonite (L-0.8Bt) was optimum with the maximum adsorption capacity of 315 mg/g when L-0.8Bt prepared with dosage of LQAS was 0.8 times cation exchange capacity (CEC) in bentonite. The optimal preparation conditions for the acetaniprid slow-release formulation were: L-0.8Bt dosage 0.02 g, adsorption time 4 h, mass concentration of acetaniprid 500 mg/L and pH 6. The potion proportion and temperature had certain effect on the slow-release speed of acetaniprid-loaded L-0.8Bt.