微塑料污染特征和生态风险评估在武河流域,中国
Shun Wan1, Guoce Xu1, Ping Xiong2
1State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi' an, 710048, Shaanxi, China.
Environmental pollution (Barking, Essex : 1987)
|May 27, 2024
概括
微塑料污染在中国武河是显著的,在沉积物中发现的度高于地表水. 沉积物特性和其他污染物影响微塑料的分布,这表明河床的生态风险更大.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 河流生态系统 河流生态系统
背景情况:
- 微塑料 (MP) 是新兴的环境污染物,引起全球越来越多的关注.
- 对中国黄河盆地的国会议员的研究是有限的,特别是关于他们的移民模式.
- 黄河的一条支流乌丁河 (Wuding River,简称WDR) 缺乏关于微塑料污染的具体数据.
研究的目的:
- 分析乌丁河地表水和沉积物中的微塑料的数量和特征.
- 调查影响微塑料分布和运输的环境因素.
- 评估在WDR中微塑料污染带来的潜在生态风险.
主要方法:
- 从武河沿线的19个地点收集和分析了地表水和沉积物样本.
- 微塑料丰富性的量化和聚合物类型,大小,形状和密度的表征.
- 统计分析以确定微塑料分布和环境因素 (例如,水质参数,土地使用,沉积物特性) 之间的关系.
主要成果:
- 沉积物中发现的微塑料度明显高 (419.47±75.61物品/公斤),与地表水 (2.98±0.69物品/升) 相比.
- 聚乙烯和聚烯是表面水中占主导地位的聚合物类型,在沉积物中较小的颗粒大小 (<0.1毫米) 和更高密度的碎片更为普遍.
- 沉积物中的微塑料保留与颗粒特征和沉积物大小有关,而地表水度与总和氨相关.
结论:
- 在武河沉积物中,微塑料污染更严重,特别是在中流和下流,造成更高的生态风险.
- 沉积物特性和环境污染物在微塑料的分布和积累中起着至关重要的作用.
- 调查结果提供了对沙河流系统中微塑料运输的重要见解,并有助于识别污染源.
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