在城市环境中的道路灰尘和雨水中表征多环芳
Chen-Hao Shi1, Bei-Bei He1, Jian-Liang Zhao2
1College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China.
Environmental monitoring and assessment
|August 7, 2024
概括
城市道路灰尘和雨水中的多环芳 (PAH) 污染因地点和交通等因素而异. 多氧化主要附着在雨水中的固体颗粒上,影响减缓策略.
科学领域:
- 环境科学 环境科学
- 城市生态城市生态学
- 分析化学 分析化学
背景情况:
- 多环芳 (PAH) 是重要的城市环境污染物.
- 在道路灰尘 (RDS) 和雨水中PAH分布的有限理解妨碍了有效的风险评估和缓解.
研究的目的:
- 在RDS和雨水中研究16种PAH物种的空间变异性.
- 确定影响城市道路表面PAH积累的内在和外在因素.
- 告知PAH污染的雨水减排设计.
主要方法:
- 从中国深的14条城市道路收集了RDS和雨水样本.
- 分析了16种PAH物种的变化.
- 评估影响PAH分布的因素,包括土地使用,车辆体积和尘埃颗粒大小.
主要成果:
- 在RDS和雨水中观察到PAH分布的显著空间差异.
- 土地使用 (工业,商业,港口地区) 和车辆数量与PAH丰度有正相关.
- 尘埃颗粒大小与PAH丰度有负相关性.
- 雨水总溶解固体 (TDS) 中的PAH与降雨持续时间相比,在溶解液相 (DLP) 中的波动更为强烈.
- 在进入雨水时,PAH往往会与固体颗粒保持联系.
结论:
- 城市土地使用和交通显著影响公路环境中的PAH分布.
- 雨水中的PAHs主要是颗粒结合的,这表明固相缓解方法至关重要.
- 调查结果为设计有效策略提供了关键数据,以管理受PAH污染的城市雨水排水.
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