Source profiles of PM2.5 and their oxidative potential from six typical industrial zones in the Guanzhong Plain

LIU Li-yan; YANG Meng-yun; XU Hong-mei; ZHANG Ning-ning; WANG Qi-yuan; SHEN Zhen-xing

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China Environmental Science ›› 2026, Vol. 46 ›› Issue (3) : 1247-1255.

Air Pollution Control

Source profiles of PM_2.5 and their oxidative potential from six typical industrial zones in the Guanzhong Plain

LIU Li-yan¹, YANG Meng-yun¹, XU Hong-mei¹, ZHANG Ning-ning², WANG Qi-yuan², SHEN Zhen-xing¹

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Abstract

PM_2.5 samples were collected from six types of industrial parks in the Guanzhong region of Shaanxi Province, including cement/concrete, brick/construction materials, forging/metallurgy, thermal power, chemical production, and glass/ceramics. The carbon fractions, water-soluble ions, elements, as well as oxidative potential (OP) of PM_2.5samples were analyzed to investigate the emission characteristics of different industrial sources and the relationships between PM_2.5 chemical components and OP. The results showed significant differences in PM_2.5 concentrations among the industrial parks, with brick/construction materials presenting the highest level (95.2μg/m³). The OC/EC (organic carbon/elemental carbon) ratio in brick/construction materials (5.5) was higher than those in other industries. Cement and concrete industry exhibited the highest Ca²⁺ concentrations. Elemental analysis showed elevated proportions of V in metal forging. Correlation analysis demonstrated significant positive relationships between OP and inorganic ions (SO₄^2-、NO₃^-、NH₄⁺) as well as metallic elements (Ca, Al, Cd, Cu). This study provides a scientific basis for identifying the source markers across common industries and for assessing their impacts on atmospheric oxidation capacity and human health.

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fine particulate matter (PM_2.5) / industrial zones / source profile / oxidative potential

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LIU Li-yan, YANG Meng-yun, XU Hong-mei, ZHANG Ning-ning, WANG Qi-yuan, SHEN Zhen-xing. Source profiles of PM_2.5 and their oxidative potential from six typical industrial zones in the Guanzhong Plain[J]. China Environmental Science. 2026, 46(3): 1247-1255

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