生态与农村环境学报 ›› 2016, Vol. 32 ›› Issue (4): 639-644.doi: 10.11934/j.issn.1673-4831.2016.04.019

• 污染控制与修复 • 上一篇    下一篇

生物滞留系统中径流雨水磷的迁移转化规律

冯萃敏1, 蔡志文1, 米楠2, 张雅君1, 钱宏亮3   

  1. 1. 北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室, 北京 100044;
    2. 中国移动通信集团设计院有限公司, 北京 100080;
    3. 北京市市政工程设计研究总院有限公司, 北京 100082
  • 收稿日期:2016-02-25 出版日期:2016-07-25 发布日期:2016-07-26
  • 作者简介:冯萃敏(1968-),女,河北承德人,教授,硕士,从事水资源再利用理论与技术方面的研究。E-mail:feng-cuimin@sohu.com
  • 基金资助:

    国家水体污染控制与治理科技重大专项(2011ZX07301-004)

Translocation and Transformation of Phosphorus in Rainwater Runoff in the Bio-Retention System

FENG Cui-min1, CAI Zhi-wen1, MI Nan2, ZHANG Ya-jun1, QIAN Hong-liang3   

  1. 1. Key Laboratory of Urban Stormwater System & Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
    2. China Mobile Group Design Institute Co. Ltd., Beijing 100080, China;
    3. Beijing General Municipal Engineering Design & Research Institute Co. Ltd., Beijing 100082, China
  • Received:2016-02-25 Online:2016-07-25 Published:2016-07-26

摘要:

基于生物滞留系统对雨水的处理效果,对其进行模拟径流雨水进水试验,通过连续提取法检测生物滞留系统土壤渗滤介质不同深度(0、5、15、35 cm)处交换态无机磷(Ex-P)、铝磷(Al-P)、铁磷(Fe-P)含量,并监测系统出水TP。结果表明,土壤渗滤介质对Ex-P、Al-P、Fe-P的吸附是从上至下逐层进行、逐层减弱的,Ex-P转化为Al-P、Fe-P,同时Al-P转化为Fe-P,因此Ex-P含量逐层减少,而Al-P、Fe-P逐层累积。系统对径流雨水中TP的去除率在90%以上,其中未被植物利用的TP体现为水-土壤-根系-生物系统内磷的动态平衡。

关键词: 生物滞留, 土壤渗滤介质, 径流雨水, 磷, 迁移, 转化

Abstract:

Based on effects of a bio-retention system on rainwater, a simulation test on rainwater runoff was carried out. With the sequential extraction method, contents of exchangeable inorganic phosphorus(Ex-P), aluminum phosphate(Al-P) and iron phosphorus(Fe-P) in the filtration medium or soil of the bioretention system at different depth (0, 5, 15 and 35 cm) were determined and TP in the effluent of bio-retention system was also monitored. Results show that the adsorption of Ex-P, Al-P and Fe-P by the soil medium decreased with the depth, layer by layer from the top to the bottom. During the process of adsorption, Ex-P gradually transformed into Al-P and Fe-P, while, Al-P did into Fe-P. As a result, Ex-P decreased in concentration while Al-P and Fe-P increased with the depth. About 90% of the TP in the runoff rainwater was intercepted and removed by the system. The phosphorus, not absorbed by plants, remained in the system, being a part of the dynamic TP balance of the water-soil-root-biome system.

Key words: bio-retention, soil filtration medium, runoff rainwater, phosphorus, translocation, transformation

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