The degradation of chlordimeform (CDM) has been investigated by a heterogeneous electro-Fenton process involving magnetite supported chitosan beads (Fe₃O₄-Cs) as catalyst. The catalyst was prepared by dropwise addition of an acidic chitosan-metal salts solution into sodium hydroxide precipitation bath. SEM, XRD and FTIR analysis were used to characterize the catalysts. The effect of experimental parameters, such as the current intensity, the amount of iron on chitosan beads, the concentration of the catalyst and the initial pH on the pollutant removal rate was investigated. The optimal conditions for the degradation of 37.5 mg L⁻¹ initial CDM concentration were achieved at an applied cathodic current of −5 mA, using 0.5 g L⁻¹ of magnetic chitosan beads (with an average iron amount of 0.104 mmol) and at pH = 3. Under these conditions, CDM was effectively removed within 30 min with 80% of NPOC removal after 6 h of treatment. The reaction followed a pseudo-first order kinetic equation. The adsorption test on the chitosan beads (with and without iron) demonstrated that the insecticide removal was solely induced by heterogeneous electro-Fenton treatment with Fe₃O₄-CS beads. In addition, the reusability of this catalyst was effectively demonstrated. Finally, LC–MS analysis allowed the proposal of a plausible degradation route.

通过异质电芬顿法研究了氯肟二甲酸酯（CDM）的降解，该方法包括磁铁矿负载的壳聚糖珠（Fe ₃ O ₄ -Cs）作为催化剂。通过将酸性壳聚糖-金属盐溶液滴加到氢氧化钠沉淀浴中来制备催化剂。SEM，XRD和FTIR分析用于表征催化剂。研究了电流强度，壳聚糖微球上铁的含量，催化剂的浓度和初始pH对污染物去除率等实验参数的影响。使用-5 g L ^-1施加-5 mA的阴极电流，可达到降解37.5 mg L ^-1初始CDM浓度的最佳条件在pH = 3的条件下，制备了磁性壳聚糖小珠（平均铁含量为0.104 mmol）。在这些条件下，处理6小时后，在30分钟内有效去除了CDM，且NPOC去除了80％。该反应遵循拟一级动力学方程。对壳聚糖珠粒（含铁和不含铁）的吸附试验表明，杀虫剂的去除仅通过用Fe ₃ O ₄ -CS珠粒进行异质电芬顿处理来诱导。另外，有效地证明了该催化剂的可重复使用性。最后，LC-MS分析允许提出可行的降解途径。