作者：李新琪^1,2, 徐涛², 谷超², 赵雪艳¹, 王静¹, 白雯宇¹, 杨文¹

作者单位：1. 中国环境科学研究院，北京 100012;
2. 新疆维吾尔自治区生态环境监测总站，新疆 乌鲁木齐 830011

关键词：水溶性离子;潜在源区;春季;大气颗粒物;硫氧化率;伊犁河谷

摘要：

为研究伊犁河谷核心区春季环境空气颗粒物中水溶性无机离子的组分特征和潜在源区，于2021年4月20-29日在伊犁州5个采样点位采集环境空气PM_2.5和PM₁₀样品并分析获取8种水溶性离子的浓度，并利用特征比值法、相关性分析和CWT分析法对水溶性无机离子的来源、形成机制进行了探讨。分析可得，在研究区域内：春季细颗粒物浓度主要是受人为源的影响，且固定源排放占据主导地位，而粗颗粒物浓度则受自然源的影响更大；细颗粒物中离子主要存在形式为(NH₄)₂SO₄、NH₄NO₃、NH₄Cl和KCl，粗颗粒物中离子主要存在形式为CaCl₂、MgCl₂、KCl、K₂SO₄、KNO₃、CaSO₄、MgSO₄、Ca(NO₃)₂和Mg(NO₃)₂；春季硫酸盐二次转化程度较高，SO₂的光化学氧化反应是本地SO₄^2–的重要来源之一；SO₄^2–、NO₃^–、NH₄⁺和Ca²⁺的潜在污染源区均主要集中在本地。

Pollution characteristics of the water-soluble inorganic ions in particulate matter during spring of Ili River Valley
LI Xinqi^1,2, XU Tao², GU Chao², ZHAO Xueyan¹, WANG Jing¹, BAI Wenyu¹, YANG Wen¹
1. Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. Ecological Environment Monitoring Centre of Xinjiang Uygur Autonomous Region, Urumqi 830011, China
Abstract: In order to study the characteristics and potential source areas of the water-soluble inorganic ions (WSIIs) in ambient PM during spring of Ili River Valley Core Area, PM_2.5 and PM₁₀ samples were collected in April 2021, and then 8 water-soluble inorganic ions were investigated. Based on the data, we discussed about the source and forming mechanism of WSIIs using eigenratio, Person correlation, and CWT analysis. The results showed that for Ili River Valley Core Area: Fine PM were mainly influenced by anthropogenic sources with a high contribution of stationary sources while coarse PM were mainly influenced by natural sources. WSIIs in PM_2.5 were mainly existed in the form of (NH₄)₂SO₄, NH₄NO₃, NH₄Cl and KCl, while existed in the form of CaCl₂、MgCl₂、KCl、K₂SO₄、KNO₃、CaSO₄、MgSO₄、Ca(NO₃)₂ and Mg(NO₃)₂ in PM_2.5-10. Photochemistry process was an important source of secondary SO₄^2–. The main potential source areas of SO₄^2–, NO₃^–, NH₄⁺ and Ca²⁺ in Ili River Valley Core Area were distributed in local areas.
Keywords: water-soluble inorganic ions;potential source area;spring;ambient particulate matter;sulfur oxidation rate;Ili River Valley
2022, 48(10):135-144  收稿日期: 2022-06-30;收到修改稿日期: 2022-09-27
基金项目: 伊犁河谷核心区城市大气污染深度源解析及污染防治对策研究项目（2021-地方科研-0595）；北京市科委“首都蓝天行动培育”项目（Z191100009119011）
作者简介: 李新琪（1974-），男，新疆乌鲁木齐市人，正高级工程师，博士，主要从事生态环境监测及管理研究
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