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| 钾掺杂生物炭催化过硫酸钠降解土壤中酚类污染物：性能与活化机理 |
| Potassium-doped biochar-catalyzed degradation of phenolic pollutants in soil by sodium persulfate: performance and activation mechanism |
| 投稿时间：2024-08-22 |
| DOI：10.13254/j.jare.2024.0655 |
| 中文关键词: 钾掺杂生物炭，过硫酸盐，催化，自由基，有机污染土壤 |
| 英文关键词: potassium-doped biochar, persulfate, catalysis, radical, organic-contaminated soil |
| 基金项目:国家重点研发计划项目（2020YFC1808603）；国家自然科学基金项目（21876042）；河北省重点研发计划项目（22374206D） |
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| 中文摘要: |
| 本研究聚焦过硫酸盐高级氧化技术（PS-AOPs）在酚类有机污染土壤修复中的应用，以K+掺杂的生物炭作为非均相催化剂，活化过硫酸盐（PS）实现对土壤中的酚类有机污染物的降解。结果表明，在K+掺杂量为5%时，苯酚的降解效率可达98.8%，而未掺杂的生物炭活化PS对苯酚的降解率仅为16.6%。掺杂K+的生物炭活化PS也可用于高效降解2，4-二氯酚和双酚A，降解率分别达到92.6%和95.4%。通过自由基淬灭实验和探针分子实验的研究，发现K+的引入显著增强了硫酸根自由基（SO4-·）、羟基自由基（·OH）和单线态氧（1O2）的生成，从而提高了活化PS降解酚类污染物的性能。本研究为采用PS-AOPs修复有机污染土壤提供了新的思路和科学依据。 |
| 英文摘要: |
| This study focused on the application of advanced persulfate oxidation technologies（PS-AOPs）to remediate soil contaminated with phenolic organic compounds. K+- doped biochar was used as a heterogeneous phase catalyst to activate persulfate, facilitating the degradation of phenolic pollutants in soil. Experimental results showed that the degradation efficiency of phenol reached 98.8% at a 5% K+ doping level, while undoped biochar activated persulfate resulted in only a 16.6% degradation rate. Additionally, K+-doped biocharactivated persulfate proved effective in degrading other contaminants such as 2, 4-dichlorophenol and bisphenol A, achieving degradation rates of 92.6% and 95.4%, respectively. Investigations involving free radical quenching experiments and probe molecular studies revealed that the introduction of K+ significantly enhanced the generation of sulfate radicals（SO4-·）, hydroxyl radicals（·OH）, and singlet oxygen （1O2）. This enhancement improved the effectiveness of activated persulfate in degrading phenolic pollutants. This work provides novel insights and scientific foundations for utilizing PS-AOPs in remediation of organically contaminated soils. |
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