Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM<sub>10</sub> Over Xi'an, China

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Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM₁₀ Over Xi'an, China

更新时间：2025-07-09

- Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM₁₀ Over Xi'an, China
- Vol. 44, Issue 9, Pages: 128-132(2010)
- 作者机构：
  
  1. 西安交通大学环境科学与工程系,西安,710049
  2. 中国科学院地球环境研究所黄土与第四纪国家重点实验室,西安,710075
- 作者简介：
- 基金信息：
- DOI：
  CLC： X823
- Online First：10 September 2010，
  
  Published：2010
- 稿件说明：
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Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM₁₀ Over Xi'an, China[J]. 2010, 44(9): 128-132.
DOI：

Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM₁₀ Over Xi'an, China[J]. 2010, 44(9): 128-132. DOI：

摘要

为了探讨西安市大气可吸入颗粒物(PM

空气动力学当量直径≤10 μm的悬浮颗粒物)中水溶性有机碳(WSOC)的浓度水平与季节变化

从2006年12月至2007年11月

分季节(每个季节选取1个月)采集了西安市大气PM

样品

并采用燃烧氧化-非分散红外吸收法测定了PM

中的水溶性有机碳

采用热-光碳分析仪测定了样品中的有机碳(OC)和元素碳(EC).结果显示

WSOC在春、夏、秋、冬季节的平均质量浓度分别为17.2、14.9、28.3、32.5 μg/m

具有明显的季节变化特征.WSOC占OC的质量比在夏季最高(83.7%)、冬季最低(53.3%).WSOC与OC和EC的相关性分析结果显示:WSOC与EC的相关性微弱

相关系数为0.22; WSOC与OC 的相关性很强

相关系数高达0.86.进一步分析显示出WSOC与二次有机碳的相关性达到了0.87

表明西安市大气颗粒物中的WSOC主要是在大气中气-固二次转化形成的.

Abstract

samples were collected in four seasons to investigate the seasonal variation of water-soluble organic carbon(WSOC)over Xi'an

China. The total organic carbon analyzer and the thermal optical carbon analyzer were used to detect the concentration of WSOC

organic carbon(OC)

and element carbon(EC)

respectively. The results show that the average concentration of WSOC was 17.2 μg/m

14.9 μg/m

28.3 μg/m

and 32.5 μg/m

from spring to winter. The percentage of WSOC in OC was highest in summer and lowest in winter. WSOC had a good correlation with OC(R=0.86)and had a poor relationship with EC(R=0.22). Moreover

the signi

ficant correlation was observed between WSOC and secondary organic carbon(SOC)(R=0.87)

indicating that the WSOC in PM

might be mainly caused by the photochemical reaction.

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references

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Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM10 Over Xi'an, China

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摘要

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关键词

Keywords

references

Seasonal Variation and Source Identification of Water-Soluble Organic Carbon in PM₁₀ Over Xi'an, China