To address future phosphorus scarcity and organophosphorus pesticides discharge associated environmental problems, a filter-press type electrochemical system was developed for acephate, a typical organophosphorus pesticide, degradation and simultaneous recovery of phosphorus. In this reaction system, boron-doped diamond (BDD) mediated anodic oxidation could transform acephate into ortho-phosphate (o-PO₄) and then o-PO₄ was precipitated with Ca²⁺ at the cathode surface in the form of hydroxyapatite induced by the local basic environment. The phosphorus recovery efficiency raised from 57 % to 92 % within 180 min by elevating current density from 5 to 30 mA/cm², accompanying the enhanced acephate mineralization efficiency from 77% to 97%. These enhancement trends were attributed to the increased yield of BDD(^•OH) and higher local pH near the cathode, respectively, at higher current density applied. Phosphorus recovery efficiency swelled by 15% with solution pH decreasing from 9.0 to 4.0 since anodic oxidation of acephate into o-PO₄ was favorable in the acid solution. Moreover, phosphorus recovery was seriously depressed in the initial reaction stage with the presence of Mg²⁺, whereas bicarbonate posed the negative effect over the whole reaction process. Unexpectedly, the presence of Cl⁻ inhibited the degradation of acephate since highly oxidative ^•OH was consumed by Cl⁻. In general, the electrochemical strategy of “anodic oxidation-cathodic precipitation” has been demonstrated practicable for phosphorus recovery from the organophosphorus wastewater.

为了解决未来磷稀缺和有机磷农药排放相关的环境问题，开发了一种压滤式电化学系统，用于降解和同时回收磷的典型有机磷农药乙酰甲胺磷。在该反应体系中，掺硼金刚石 (BDD) 介导的阳极氧化可将乙酰磷灰石转化为正磷酸盐 (o-PO ₄ )，然后 o-PO ₄与 Ca ²⁺在阴极表面以羟基磷灰石诱导的形式沉淀。由当地的基本环境决定。通过将电流密度从 5 mA/cm ²提高到 30 mA/cm ²，磷回收效率在 180 分钟内从 57 % 提高到 92 %，伴随着乙酰甲胺磷矿化效率从 77% 提高到 97%。这些增强趋势分别归因于在施加更高电流密度时BDD( ^• OH)产量增加和阴极附近更高的局部 pH 值。由于在酸溶液中乙酰甲胺磷阳极氧化为 o-PO ₄是有利的，磷回收效率随着溶液 pH 值从 9.0 降低到 4.0 增加了 15% 。此外，Mg ²⁺的存在在初始反应阶段严重抑制了磷的回收率，而碳酸氢盐对整个反应过程产生了负面影响。出乎意料的是，Cl ^-的存在抑制了乙酰甲胺磷的降解，因为它具有高度氧化性^•OH 被 Cl ^-消耗。总的来说，“阳极氧化-阴极沉淀”的电化学策略已被证明可用于从有机磷废水中回收磷。