在灌水中去除微塑料的可持续沙子过策略
Ziliang Zhou1, Kai Zhang1, Yanan Ren2
1College of Water Resources and Civil Engineering, China Agricultural University, Beijing, 100083, China; State Key Laboratory of Efficient Utilization of Agricultural Water Resources, Beijing, 100083, China.
Environmental research
|December 27, 2025
概括
较小的沙过介质 (0.5-1.0毫米) 和更高的反冲流量 (0.017米/秒) 显著改善了从灌水中去除微塑料的情况. 通过3分钟的反冲洗,可以实现最佳的清洁,减少农业微塑料污染.
科学领域:
- 环境科学 环境科学
- 农业工程 农业工程
- 水处理技术 水处理技术
背景情况:
- 农业灌水中的微塑料污染是一个重大的环境问题.
- 砂过器在灌中很常见,但它们的微塑料清除效率需要进一步研究.
研究的目的:
- 根据介质大小,微塑料特性和反冲参数来评估沙子过器去除微塑料的性能.
- 确定沙过器的最佳操作设置,以减轻灌系统中的微塑料污染.
主要方法:
- 经过测试的沙过器,介质尺寸为0.5-1.0毫米,1.0-1.5毫米和1.5-2.0毫米.
- 评估了各种微塑料形态型和尺寸 (100-5000微米) 的去除.
- 使用流速 (0.007-0.017 m/s) 和持续时间 (1-10 分钟) 评估反冲效率.
主要成果:
- 较小的介质 (0.5-1.0毫米) 与较大的介质 (55.6%为1.5-2.0毫米) 相比,获得更高的去除率 (89.9%).
- 过对于较大的微塑料 (81%) 和纤维 (~85%) 比较小的颗粒 (17.3%对于100-200μm) 更有效.
- 最佳反冲洗发生在0.017 m/s的3分钟,平衡效率与资源使用.
结论:
- 带有0.5-1.0毫米介质和优化的反冲洗 (0.017米/秒,3分钟) 的沙过器对于微塑料的去除是有效的.
- 对于较小的微塑料和颗粒微塑料,建议进行二次过.
- 通过改善水质管理,研究结果支持可持续的农业实践.
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