废水在植被生物过系统中的微量有机化学品的命运
Kefeng Zhang1, Lihao Yuan1, Ana Deletic2
1Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales (UNSW), High St, Kensington, NSW, 2052, Australia.
Water research
|December 17, 2024
概括
植被生物过系统 (VBS) 有效地去除常见的废水污染物,如咖啡因和布洛芬. 工厂的选择和操作调整显著改善了特定微量有机化学品 (TrOCs) 的去除,如硫甲和DEET.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 绿色基础设施绿色基础设施
背景情况:
- 植被生物过系统 (VBS) 已被公认为用于处理城市雨水和灰色水.
- 优化用于废水处理的VBS,特别是关于微量有机化学品 (TrOCs),仍然是一个挑战.
- 在TROC负载下植物物种对VBS性能的影响尚不清楚.
研究的目的:
- 评估VBS在去除六种常见废水TROC中的一年有效性:咖啡因 (CAF), (PCM),硫 (SMX),N,N-二甲基甲胺 (DEET),双A (BPA) 和布洛芬 (IBU).
- 调查植物物种,土壤介质深度,土壤特征和操作条件对TROC清除效率的影响.
- 确定最佳的VBS设计和操作策略,以提高TROC去除的效果.
主要方法:
- 一个长达一年的实验室专研究涉及11个VBS配置.
- 测试了具有不同特征的七种不同的植物物种.
- 应用了不同的土壤介质深度和特性,以及不同的剂量和剂量.
主要成果:
- VBS显示了CAF,BPA和IBU的高去除率 (>95%);PCM (>79%) 和SMX的中等去除率 (50% - 80%);DEET的低去除率 (<12%).
- 植物物种显著影响了SMX和DEET去除 (p<0.05),其中*C. indica*表现最好.
- 降低液压负载率和降低剂量量/频率对PCM,SMX和DEET的去除产生了积极的影响. 在过介质中观察到SMX,DEET和BPA的积累,植物根中的CAF和DEET度更高.
结论:
- 植物选择是优化VBS性能,以消除SMX和DEET等特定TROC的关键因素.
- 调整操作参数,如液压加载率和剂量策略,可以提高某些TROC的去除.
- VBS显示了TROC去除的潜力,但其在过介质和植物组织中的积累需要进一步研究,以获得可持续的应用.
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