Nitrate aerosol and dust pollution evidence from a non-central-heating county in China

IF 3.5 3区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Applied Geochemistry Pub Date : 2026-02-01 Epub Date: 2025-12-31 DOI:10.1016/j.apgeochem.2025.106675

Mingya Wang , Wenju Wang , Mingshi Wang , Xuechun Zhang , Baoxian Jia

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引用次数: 0

Abstract

As urbanization in China has shifted from major cities to surrounding counties, the study of PM_2.5 in these areas has gained significant attention. However, the pollution characteristics and sources of winter PM_2.5 in noncoal-heating counties in China remain unclear. In this study, PM_2.5 samples were collected from both urban and suburban functional areas in Xixian County, China. The mean PM_2.5 concentrations at the Xizhou Hotel (urban) and Primary School (suburban) sites were 81.4 ± 28.2 and 97.1 ± 35.7 μg/m³, respectively, with higher concentrations observed at the suburban site than at the mixed commercial and residential site. Two distinct haze types were identified: the first, dominated by Ca and Al, was primarily caused by windblown dust, including construction dust and soil dust from abandoned farmlands. The second, dominated by NO₃⁻, SO₄²⁻, and NH₄⁺, resulted from the secondary oxidation of primary gaseous precursors. Secondary pollutants (53.0 %) and vehicular traffic (24.9 %) were the major contributors. This study provides valuable data on the chemical characteristics and sources of winter haze in noncoal heating counties, providing a scientific basis for global PM_2.5 control strategies.

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中国一个非集中供暖县的硝酸盐气溶胶和粉尘污染证据

随着中国的城市化从主要城市向周边县转移，对这些地区PM2.5的研究受到了极大的关注。然而，中国非煤供热县冬季PM2.5的污染特征和来源尚不清楚。在本研究中，PM2.5样本分别来自中国西县的城市和郊区功能区。喜洲宾馆（市区）和小学（郊区）的PM2.5平均浓度分别为81.4±28.2和97.1±35.7 μg/m3，郊区站点的PM2.5浓度高于商住混合站点。发现了两种不同的雾霾类型：第一种以Ca和Al为主，主要由风吹粉尘引起，包括建筑粉尘和废弃农田的土壤粉尘。第二种是由原生气体前驱体的二次氧化产生的，以NO3−、SO42−和NH4+为主。二次污染物（53.0%）和机动车污染（24.9%）是主要污染源。本研究为非煤供热县冬季雾霾的化学特征和来源提供了有价值的数据，为全球PM2.5控制策略提供了科学依据。

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

Applied Geochemistry 地学-地球化学与地球物理

CiteScore

6.10

自引率

8.80%

发文量

272

审稿时长

65 days

期刊介绍： Applied Geochemistry is an international journal devoted to publication of original research papers, rapid research communications and selected review papers in geochemistry and urban geochemistry which have some practical application to an aspect of human endeavour, such as the preservation of the environment, health, waste disposal and the search for resources. Papers on applications of inorganic, organic and isotope geochemistry and geochemical processes are therefore welcome provided they meet the main criterion. Spatial and temporal monitoring case studies are only of interest to our international readership if they present new ideas of broad application. Topics covered include: (1) Environmental geochemistry (including natural and anthropogenic aspects, and protection and remediation strategies); (2) Hydrogeochemistry (surface and groundwater); (3) Medical (urban) geochemistry; (4) The search for energy resources (in particular unconventional oil and gas or emerging metal resources); (5) Energy exploitation (in particular geothermal energy and CCS); (6) Upgrading of energy and mineral resources where there is a direct geochemical application; and (7) Waste disposal, including nuclear waste disposal.