在中国哈尔的雪罩中,颗粒元素和无机离子的化学特征,分布模式和来源分配
Zihan Song1, Leiming Zhang2, Chongguo Tian3
1International Joint Research Center for Persistent Toxic Substances (IJRC-PTS), School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China; Research Center for Eco-Environment Protection of Songhua River Basin, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China.
Chemosphere
|December 8, 2023
概括
中国哈尔的雪地揭示了来自工业和交通来源的大量重金属污染. 地元素占主导地位,但重金属偶尔会超过水质标准,表明环境风险.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 地质化学 地质化学
背景情况:
- 雪地充当了大气中污染物沉积的重要档案.
- 评估雪地组成,可以了解地表环境和生态系统的污染物输入.
- 了解污染源对于城市和区域环境管理至关重要.
研究的目的:
- 分析了中国哈尔雪地中的元素和水溶性无机离子组成.
- 确定城市,郊区和农村地区污染物的来源和沉积模式.
- 评估与积雪中的重金属度相关的潜在环境风险.
主要方法:
- 从20个工业,文化,娱乐和农业地区的20个地点收集了29个积雪样本.
- 使用先进的分析技术分析了31种元素和6种主要水溶性无机离子 (WSIIs).
- 区分雪层 (雪层,颗粒层) 以了解沉积过程.
主要成果:
- 地元素占总元素质量的大部分 (95.8%-99.2%).
- 重金属,虽然很小 (0.77%-4.07%),偶尔达到或超过了地表水质量标准.
- 硫酸盐 (SO42-) 和 (Ca2+) 分别是主要的离子和离子.
- 湿沉积在石化厂附近占主导地位,而干沉积在水泥厂附近占主导地位.
- 煤炭燃烧,工业排放和交通被确定为城市地区重金属丰富的主要来源;煤炭燃烧和农村地区生物质燃烧.
结论:
- 哈尔的雪地反映了大气污染的严重程度,重金属对环境构成潜在的关注.
- 污染源因地区而异,工业和交通活动影响城市雪,煤炭/生物质燃烧影响农村雪.
- 哈尔以西,西北部,北部和东北部的地区是这些大气污染物的潜在来源.
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