Mechanism study on the removal of Cd2+ and acetamiprid from wastewater treatment plant effluent by PMS activated by tobacco stem biochar under humic acid induction†

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL Physical Chemistry Chemical Physics Pub Date : 2025-03-11 DOI:10.1039/D5CP00479A

Xiaojuan Su, Pengfei Gao, Yuanchuan Ren, Jieba Li and Nanqi Ren

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Abstract

In this study, tobacco stem based porous biochar was prepared using a direct induced etching process (HA₅@TSB). The microstructure with the target functional group was confirmed through detailed SEM, FTIR, XPS, and EPR analysis. Combined with PMS for Cd(II) adsorption and acetamiprid (Ace) degradation, experiments showed that under optimal conditions, the removal rate of Cd(II) within 30 minutes was 95.48%, and the removal rate of Ace within 10 minutes was 97.21%. Through 6 consecutive removal experiments, the removal rates of Cd(II) and Ace by HA₅@TSB still reached 94.56% and 97.14%, respectively, confirming its stable catalytic activity and promising prospects for effective reuse. Using different free radical scavengers, the roles and contributions of different reactive oxygen species (ROS) were elucidated (SO₄⁻˙ (51.43%) > ˙OH (29.50%) > ˙¹O₂ (7.71%) > ˙O₂⁻ (3.01%)). In addition, degradation intermediates were identified by liquid chromatography/tandem mass spectrometry (LC–MS), and four degradation pathways were proposed. This superior efficiency provides great potential for the development and utilization of advanced oxidation systems for organic matter degradation and simultaneous adsorption of heavy metals using agricultural and forestry waste-based catalysts, providing alternative solutions for environmental pollution and energy crisis issues.

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腐植酸诱导下烟草干炭活化PMS去除废水中Cd2+和啶虫啉的机理研究

在本研究中，采用直接诱导蚀刻工艺制备了烟草茎基多孔生物炭（HA5@TSB）。通过详细的SEM、FTIR、XPS和EPR分析，确定了具有目标官能团的微观结构。并结合PMS对Cd （II）的吸附和对啶虫啉（Ace）的降解，实验表明，在最优条件下，30 min内Cd （II）的去除率为95.48%，10 min内Ace的去除率为97.21%。通过连续6次的去除实验，HA5@TSB对Cd （II）和Ace的去除率仍分别达到94.56%和97.14%，证实了其稳定的催化活性和有效再利用的前景。利用不同的自由基清除剂，阐明了不同活性氧(SO4-·(51.43%)>·OH (29.50%) >o2（7.71%)>·O2-(3.01%)）的作用和贡献。此外，通过液相色谱/串联质谱（LC-MS）鉴定了降解中间体，并提出了4种降解途径。这种优异的效率为利用农林废弃物为基础的催化剂进行有机物降解和同时吸附重金属的高级氧化系统的开发和利用提供了巨大的潜力，为环境污染和能源危机问题提供了替代解决方案。

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.