土地使用类型对河水中的微塑料的影响:关于中国河主流的案例研究,中国
Le Zhang1,2, Xi Li1,2, Qi Li3,4
1College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China.
Environmental monitoring and assessment
|March 7, 2024
概括
微塑料污染在河中普遍存在,在城市地区发现的度更高. 人类活动和环境因素显著影响微塑料在水和沉积物中的分布.
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:
- 微塑料污染了河流和沉积物,对水生环境构成风险.
- 河是黄河的主要支流,面临生态脆弱性和高沉积物负载.
- 对于影响微塑料分布在河中的因素的了解有限.
研究的目的:
- 为了研究微塑料在河的时空分布.
- 识别微塑料的主要形状,尺寸和颜色.
- 确定微塑料丰富度与人为/环境因素之间的相关性.
主要方法:
- 在河水和沉积物中采样微塑料.
- 分析微塑料的数量,形状,大小和颜色.
- 相关性分析将微塑料含量与人口密度,GDP,距离,水温,NH3-N和ORP联系起来.
主要成果:
- 微塑料的丰富度在水中为1033至8333件/立方米,在沉积物中为120至840件/公斤.
- 纤维和碎片是主要的形状;尺寸<500微米和黑/白/透明颜色是最常见的.
- 与农业和山区相比,在城市地区观察到的微塑料度更高.
结论:
- 微塑料在河的分布受到人类活动和环境条件的重大影响.
- 水温和氨- (NH3-N) 是影响微塑料水平的关键环境因素.
- 这些发现凸显了针对减轻微塑料污染在河生态系统中的目标战略的必要性.
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