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

梁高磊; 牟桉永; 任更波; 温娟; 周滨; 焦永杰; 马小东

文章摘要

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

Received:August 22, 2024

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）

Author Name	Affiliation	E-mail
LIANG Gaolei	School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
MU Anyong	Department of Quality, Safety and Environmental Protection, Petro China Dagang Oilfield Co., Tianjin 300280, China
REN Gengbo	School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
WEN Juan	Tianjin Academy of Environmental Sciences, Tianjin 300191, China
ZHOU Bin	Tianjin Academy of Environmental Sciences, Tianjin 300191, China
JIAO Yongjie	Tianjin Academy of Environmental Sciences, Tianjin 300191, China
MA Xiaodong	School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China	maxd@hebut.edu.cn

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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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