Cationic polyelectrolytes, synthetic (PCA) and dextran derivatives (D40-EtX) have been evaluated, for the first time, as flocculants for the separation of the commercial pesticides Novadim Progress -organophosphoric type (active ingredient Dimethoate), Decis and Karate Zeon - pyrethroid type (active ingredients Deltamethrin and lambda- Cyhalothrin, respectively) from synthetic wastewater. The investigated ionic polymer samples contain different amount of quaternary ammonium salts groups in the chain. The effects of settling time, polymer dose, ionic groups content, pesticides concentration on the separation efficacy have been investigated. The UV–Vis spectroscopy data indicate that the highest removal efficiency of pesticides (between 90 and 94% for Novadim Progress and between 86 and 94% for the pyrethroids insecticides) has been achieved by the polyelectrolytes with the highest charged groups content (higher than 90%). The charge neutralization mechanism had a noteworthy contribution to the pesticide removal as indicated by the zeta potential and particle size measurements. Slightly lower optimum polycation doses were found for lower pesticides concentrations.

首次评估了阳离子聚电解质、合成 (PCA) 和葡聚糖衍生物 (D40-EtX) 作为絮凝剂，用于分离商业农药 Novadim Progress -有机磷型（活性成分乐果）、Decis 和 Karate Zeon - 拟除虫菊酯类型（活性成分分别为溴氰菊酯和 λ-三氯氟氰菊酯）来自合成废水。所研究的离子聚合物样品在链中含有不同量的季铵盐基团。研究了沉降时间、聚合物用量、离子基团含量、农药浓度对分离效果的影响。UV-Vis 光谱数据表明，具有最高带电基团含量（高于 90）的聚电解质实现了农药的最高去除效率（Novadim Progress 为 90 至 94%，拟除虫菊酯杀虫剂为 86 至 94%）。 %）。zeta 电位和粒径测量表明，电荷中和机制对农药去除有显着贡献。对于较低的农药浓度，发现最佳聚阳离子剂量略低。