微波强化-缓释型过硫酸盐氧化协同修复农药污染场地的机理

本课题团队考察了过硫酸盐浓度、微波温度、土壤含水率等对微波-过硫酸盐体系去除对硫磷的影响；探究了活性氧物质的作用，发现SO4•−，•OH，O2•−和1O2均参与了对硫磷的降解；分析了对硫磷的降解机制。构建了锰氧化物-微波/过硫酸盐联合体系用于芘污染土壤的修复，结果表明，锰氧化物的添加对芘的去除率有显著的促进作用；
MnxOy通过将Mn(IV)转化为Mn(III)、Mn-O-Mn转化为Mn-O-X，提高了活性物质的生成，并将自由基过程转化为非自由基过程，1O2是对芘的降解起主要作用的活性氧物质。研究了纳米Fe3O4催化微波-过硫酸盐对土壤中芘降解的增强作用，证实了Fe3O4在MW/PS体系中具有良好的催化性能；探究了Fe3O4含量、PS浓度、MW温度和土壤含水率等因素对芘降解的影响；鉴定了体系中主要的ROS为SO4•‑、•OH、O2•-和1O2。研究了通过调控有氧和厌氧条件实现土壤中对氯硝基苯的高效降解，揭示了厌氧条件下生成的还原性自由基（S2O8•-）和猝灭实验中产生的醇自由基对对氯硝基苯降解的促进作用；探究了不同氧气条件下复合有机污染土壤（对硫磷、芘、对氯硝基苯）的降解效果。研究了生物炭耦合微波修复对硫磷（PTH）污染土壤，分析了对硫磷的降解规律及机制。

This study team investigated the effects of persulfate concentration, microwave temperature, soil moisture content and other factors on the removal of parathion by the microwave-persulfate system. The roles of reactive oxygen species (ROS) were explored, and it was found that SO4•−, •OH, O2•− and 1O2 all participated in the degradation of parathion; the degradation mechanism of parathion was analyzed. A manganese oxide-microwave/persulfate combined system was constructed for the remediation of pyrene-contaminated soil, and the results showed that the addition of manganese oxide significantly promoted the removal rate of pyrene. MnₓOᵧ enhanced the generation of active substances by converting Mn(IV) to Mn(III) and Mn-O-Mn to Mn-O-X, and transformed the radical process into a non-radical process, with 1O2 being the dominant ROS responsible for pyrene degradation. The enhanced degradation of pyrene in soil by nano-Fe3O4-catalyzed microwave-persulfate system was studied, and the excellent catalytic performance of Fe3O4 in the MW/PS system was confirmed; the effects of factors including Fe3O4 dosage, persulfate concentration, microwave temperature and soil moisture content on pyrene degradation were explored; the main ROS in the system were identified as SO4•−, •OH, O2•− and 1O2. The efficient degradation of p-chloronitrobenzene in soil by regulating aerobic and anaerobic conditions was studied, and the promoting effects of reductive radicals (S2O8•−) generated under anaerobic conditions and alcohol radicals produced in quenching experiments on p-chloronitrobenzene degradation were revealed; the degradation effects of combined organic contaminated soil (parathion, pyrene, p-chloronitrobenzene) under different oxygen conditions were investigated. The remediation of parathion (PTH)-contaminated soil by biochar coupled with microwave was studied, and the degradation rules and mechanism of parathion were analyzed.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于微波强化与缓释型过硫酸盐氧化协同技术，用于修复农药污染场地，主要研究对硫磷、芘等污染物的降解机理。数据集通过实验考察了过硫酸盐浓度、微波温度、土壤含水率等因素对降解效果的影响，并探究了活性氧物质（如SO4•−、•OH、O2•−和1O2）的作用机制，同时涉及锰氧化物和纳米Fe3O4催化体系的构建。数据来自国家重点研发计划项目，旨在支持复合有机污染场地的高效修复技术研究。