Fe(II)-loaded goat manure biochar efficiently activated peroxymonosulfate for tetracycline degradation in groundwater

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Frontiers in Environmental Science Pub Date : 2024-12-20 DOI:10.3389/fenvs.2024.1467797

Lianjie Fan, Qinglin Xie, Yanhong Li, Shengzhang Zou, Haiping Lu, S. Li, Xiaoxiao Li

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引用次数: 1

Abstract

Poultry manure is one of the important sources of antibiotic pollution in agricultural soil and groundwater. Recently, the excessive discharge of goat manure has resulted in groundwater environmental challenges and negative impacts. It is of practical significance that such wastes can be converted into functional materials to promote the resource utilization of waste and reduce the risk of antibiotic contamination. In this study, Fe (Ⅱ)-loaded goat manure biochar (Fe-GMC) was prepared by pyrolyzing goat manure and iron salts and used to activate peroxymonosulfate (PMS) for tetracycline (TC) degradation in groundwater. The as-prepared Fe-GMC exhibited good catalytic performance for PMS activation due to its porous surface and rich oxygen-containing groups. Under the conditions of catalyst dosage of 0.2 g/L, PMS dosage of 1.0 mM, and pH of 3.0, TC was removed 81.3% within 60 min. In addition, the TC degradation efficiency was inhibited to different extents by inorganic anions (HCO 3 − >Cl − >NO 3 − ) in water. Furthermore, the quenching experiments, electron paramagnetic resonance (EPR) experiments, and X-ray photoelectron spectroscopy (XPS) spectra analysis indicated that the generation of hydroxyl radicals ( • OH) was responsible for TC degradation. Particularly, Fe-GMC produces a strong oxidizing agent. This study provides an efficient and environmentally friendly tetracycline degradation catalyst, which offers a new theoretical basis for water environmental remediation.

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负载铁（II）的羊粪生物炭有效激活过氧单硫酸盐对地下水中四环素的降解

家禽粪便是农业土壤和地下水中抗生素污染的重要来源之一。近年来，羊粪的过度排放给地下水环境带来了挑战和负面影响。将此类废弃物转化为功能材料，促进废弃物资源化利用，降低抗生素污染风险，具有现实意义。本研究通过对羊粪和铁盐的热解制备了Fe（Ⅱ）负载的羊粪生物炭（Fe- gmc），并用于激活过氧单硫酸盐（PMS）降解地下水中的四环素（TC）。制备的Fe-GMC由于其多孔表面和丰富的含氧基团，具有良好的PMS活化催化性能。在催化剂用量为0.2 g/L、PMS用量为1.0 mM、pH为3.0的条件下，60 min内TC的去除率为81.3%。此外，水中无机阴离子（hco3−>Cl−> no3−）对TC的降解效率有不同程度的抑制作用。此外，淬火实验、电子顺磁共振（EPR）实验和x射线光电子能谱（XPS）分析表明，羟基自由基（•OH）的生成与TC的降解有关。特别是，Fe-GMC产生一种强氧化剂。本研究提供了一种高效环保的四环素降解催化剂，为水环境修复提供了新的理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Environmental Science Environmental Science-General Environmental Science

CiteScore

4.50

自引率

8.70%

发文量

2276

审稿时长

12 weeks

期刊介绍： Our natural world is experiencing a state of rapid change unprecedented in the presence of humans. The changes affect virtually all physical, chemical and biological systems on Earth. The interaction of these systems leads to tipping points, feedbacks and amplification of effects. In virtually all cases, the causes of environmental change can be traced to human activity through either direct interventions as a consequence of pollution, or through global warming from greenhouse case emissions. Well-formulated and internationally-relevant policies to mitigate the change, or adapt to the consequences, that will ensure our ability to thrive in the coming decades are badly needed. Without proper understanding of the processes involved, and deep understanding of the likely impacts of bad decisions or inaction, the security of food, water and energy is a risk. Left unchecked shortages of these basic commodities will lead to migration, global geopolitical tension and conflict. This represents the major challenge of our time. We are the first generation to appreciate the problem and we will be judged in future by our ability to determine and take the action necessary. Appropriate knowledge of the condition of our natural world, appreciation of the changes occurring, and predictions of how the future will develop are requisite to the definition and implementation of solutions. Frontiers in Environmental Science publishes research at the cutting edge of knowledge of our natural world and its various intersections with society. It bridges between the identification and measurement of change, comprehension of the processes responsible, and the measures needed to reduce their impact. Its aim is to assist the formulation of policies, by offering sound scientific evidence on environmental science, that will lead to a more inhabitable and sustainable world for the generations to come.