高度草甘在生物保留细胞中的去除特性
Yanwei Xu1,2, Jiajia Zhou1,2, Lipeng Liang1,2
1Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, People's Republic of China.
Environmental technology
|January 31, 2024
概括
生物保留细胞有效地从雨水排水中去除常见的杀虫剂草甘. 化物修改的填料表现出比煤灰修改的更高的去除效率,降解主要发生在上层填料层中.
科学领域:
- 环境科学 环境科学
- 水质管理水质管理
- 农药补救措施 农药补救措施
背景情况:
- 草甘是一种广泛使用的除草剂,在农业和城市雨水排水中被检测到.
- 含有草甘的排水对水生生态系统和潜在的饮用水源构成风险.
- 生物保留电池是设计用于管理雨水流水质量的工程系统.
研究的目的:
- 评估使用不同填充材料的生物保留细胞在从流水中去除草甘的有效性.
- 调查草甘及其降解产品在生物保留细胞填充剂中的转化途径和空间分布.
- 了解填充剂类型和降雨事件对生物保留系统中草甘命运的影响.
主要方法:
- 使用两种不同的填充剂类型建造和运行生物保留电池:煤改性 (CLB) 和化物改性 (ZLB).
- 监测进水和废水中的草甘酸度,以及填充材料的不同深度.
- 在模拟降雨事件下分析草甘降解产品及其分布模式.
主要成果:
- 无论是CLB和ZLB的生物保留细胞都显示出显著的草甘去除效率,从CLB的33.13%到99.7%,从ZLB的55.04%到99.7%.
- 草甘的转化主要发生在填充材料的上层.
- 与最终废水相比,草甘降解产品的度在中间出口处要高得多,这表明细胞内的转化.
- 降雨事件影响了草甘及其代谢物的迁移和分布,对CLB (5和35厘米) 和ZLB (15和25厘米) 观察到不同的空间模式.
结论:
- 生物防护细胞,特别是那些使用化物修饰的生物防护细胞,可以有效地从受污染的下水中去除草甘.
- 填充材料显著影响草甘吸附,降解和生物保留系统内的空间分布.
- 了解转化和迁移动态对于优化生物保留细胞设计和农药管理中的性能至关重要.
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