制定和应用微塑料样本的标准分析方法:城市污水和污水污泥作为环境中微塑料的来源
Keqing Li1, Yidi Gao1, Ying Zhang1
1Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun, 130117, China.
Environmental research
|February 28, 2025
概括
一种新的标准化方法准确量化了废水中的微塑料 (MP). 这项研究为分析废水处理厂中的MP建立了"黄金标准",这对于了解环境污染至关重要.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 水处理 处理水的方法
背景情况:
- 微塑料 (MP) 是普遍存在的环境污染物,对生态系统和健康构成风险.
- 废水处理厂 (WWTP) 是MP污染的重要来源,原因是废水处理不完整.
- 不一致的分析方法阻碍了准确的MP量化和比较研究.
研究的目的:
- 开发和验证一种标准化,高效和准确的废水和污泥中微塑料分析方法.
- 为了建立一个
- 黄金标准就是黄金标准.
- 在各种WWTP中量化微塑料的方法.
- 评估从WWTP中去除微塑料的清除效率和环境排放.
主要方法:
- 开发了一种使用金属过器和超声波辅助转移进行改进脱吸的标准化方法.
- 采用NaI漂浮技术,几乎完全回收微塑料.
- 使用两步消化 (芬顿试剂和细胞质) 进行高效的有机物质去除,同时保存微塑料.
- 调整了该方法,以考虑WWTP特定的变量,如处理过程和水量.
主要成果:
- 标准化方法实现了100%的微塑料回收和有效的有机物质去除 (54.21%的体重减轻).
- 污水流入量为253018,240 MP/L,排水量为6501700 MP/L,每日排放量估计为1.42 × 10 8 MP/d.
- 微塑料主要分成污泥 (38.6104.5 MP/g干量),初级沉积物去除了57.07%的MP.
- 聚氨 (PU),聚乙烯二甲 (PET) 和聚四乙烯 (PTFE) 在流入水中最为丰富;聚胺 (PA),PU和PET在废水中最为丰富.
- 微塑料<0.5毫米构成了98%的颗粒,其规则形状在废水中增加.
结论:
- 开发的方法可以作为一个
- 黄金标准就是黄金标准.
- 用于废水处理厂中的微塑料分析.
- 污水处理厂是微塑料污染的重要贡献者,每天大量排放到环境中.
- 了解WWTP中的微塑料分离和去除对于减轻环境污染至关重要.
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