煤炭及其制备产品中的原生多环芳烃--环境污染的混合来源。

IF 7.6 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Environmental Pollution Pub Date : 2024-11-15 Epub Date: 2024-09-06 DOI:10.1016/j.envpol.2024.124894
Shan Li, Ziqi Xu, Peng Wu, Shuquan Zhu, Handong Liang
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引用次数: 0

摘要

多环芳烃(PAHs)是环境污染物,也是煤和煤矸石的固有成分。这两种来源材料的多环芳烃特性的异同在很大程度上还不为人所知。本研究分析了中国王家岭选煤厂的原煤、精煤、煤泥、中煤和煤矸石,以确定可萃取多环芳烃的浓度和分布。41种PAHs(∑41PAH)、US EPA 16种优先母体PAHs(∑16PAH)及其烷基化衍生物(∑aPAH)的总浓度范围分别为18.3至89.6、8.70至34.5、8.40至48.0 mg/kg,排序为原煤>精煤>煤泥>中煤>煤矸石。原煤及其制备产品的多环芳烃特征一致,以 2-3 环多环芳烃为主,多环芳烃异构体比例分布相似。根据文献整理了不同等级煤炭和不同产地煤矸石的常规多环芳烃异构体比率分布。得出的分布一致,并与比率所定义的岩石源和火成源重叠。因此,煤和煤矸石应被视为一个类别,并归类为混合源(岩石源和热成源的混合物)。为了准确确定环境中多环芳烃的来源,应扩大对环境中多环芳烃以及煤和煤矸石中多环芳烃特性的调查。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Native polycyclic aromatic hydrocarbons (PAHs) in coal and its preparation products-A mixed source of environmental contamination.

Polycyclic aromatic hydrocarbons (PAHs) are environmental pollutants and inherent components of coal and coal gangue. The similarities and differences in PAH characteristics between these two source materials are largely unknown. In this study, raw coal, cleaned coal, slime, middlings, and gangue from the Wangjialing Coal Preparation Plant in China were analyzed to determine the concentration and distribution of extractable PAHs. The total concentrations of 41PAHs (∑41PAH), US EPA 16 priority parent PAHs (∑16PAH), and their alkylated derivatives (∑aPAH) ranged from 18.3 to 89.6, 8.70 to 34.5, and 8.40-48.0 mg/kg, respectively, and were ranked as raw coal > cleaned coal > slime > middlings > gangue. The PAH characteristics of raw coal and its preparation products were consistent, with predominant 2-3-ring PAHs and similar PAH isomer ratio distributions. The distribution of conventional PAH isomer ratios for different ranks of coal and coal gangue from different origins was compiled from the literature. The resulting distribution was consistent and overlapped with both petrogenic and pyrogenic sources defined by the ratios. Therefore, coal and coal gangue should be considered one category and classified as a mixed source (mixture of petrogenic and pyrogenic sources). To accurately identify environmental PAH sources, investigations of aPAHs in the environment and PAH characteristics in coal and coal gangue should be expanded.

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来源期刊
Environmental Pollution
Environmental Pollution 环境科学-环境科学
CiteScore
16.00
自引率
6.70%
发文量
2082
审稿时长
2.9 months
期刊介绍: Environmental Pollution is an international peer-reviewed journal that publishes high-quality research papers and review articles covering all aspects of environmental pollution and its impacts on ecosystems and human health. Subject areas include, but are not limited to: • Sources and occurrences of pollutants that are clearly defined and measured in environmental compartments, food and food-related items, and human bodies; • Interlinks between contaminant exposure and biological, ecological, and human health effects, including those of climate change; • Contaminants of emerging concerns (including but not limited to antibiotic resistant microorganisms or genes, microplastics/nanoplastics, electronic wastes, light, and noise) and/or their biological, ecological, or human health effects; • Laboratory and field studies on the remediation/mitigation of environmental pollution via new techniques and with clear links to biological, ecological, or human health effects; • Modeling of pollution processes, patterns, or trends that is of clear environmental and/or human health interest; • New techniques that measure and examine environmental occurrences, transport, behavior, and effects of pollutants within the environment or the laboratory, provided that they can be clearly used to address problems within regional or global environmental compartments.
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