中国北部典型季节性河流中的微塑料污染:时间变化和风险评估
Mufan Gan1, Yan Zhang1, Peng Shi2
1Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China. zhangy.11b@igsnrr.ac.cn.
Environmental science. Processes & impacts
|August 15, 2023
概括
河的微塑料污染在干旱季比雨季更高. 这项研究评估了季节性河流中的微塑料 (MP) 污染风险,为管理提供了见解.
科学领域:
- 环境科学 环境科学
- 水质监测 水质监测
- 污染研究 污染研究
背景情况:
- 河流是从陆地环境运输微塑料到海洋生态系统的关键通道.
- 季节性河流的特点是独特的潮湿和干旱时期,在污染物分布和积累方面呈现出独特的动态.
- 了解微塑料污染的时间变化对于有效的环境管理至关重要.
研究的目的:
- 量化微塑料丰富度和微塑料成分在河表面水中的时间变化.
- 评估不同季节与微塑料污染相关的生态风险.
- 为管理季节性河流系统中的微塑料污染提供科学基础.
主要方法:
- 在干旱和潮湿季节从河收集了地表水样.
- 使用光谱技术 (红外光谱仪,拉曼光谱) 分析了微塑料的丰度和特征 (例如,类型,聚合物).
- 污染负载指数 (PLI) 和风险系数 (RQ) 计算以评估污染水平和生态风险.
主要成果:
- 在干旱季节,微塑料的丰富程度明显高于潮湿季节 (p < 0.05).
- 纤维是主要的微塑料类型,聚烯 (PP) 和聚乙烯 (PE) 是主要的聚合物.
- 生态风险评估显示,干旱季污染水平较高 (PLI: 2.10,RQ: 1.19),雨季污染水平显著下降 (PLI: 1.25,RQ: 0.74).
结论:
- 季节性变化显著影响河流系统中的微塑料分布和污染强度.
- 在干旱季节,河经历了更高的微塑料污染负载和风险.
- 这些发现为决策者和河流管理者提供了关键的科学数据,以有效解决季节性河流中的微塑料污染问题.
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