城市水体底泥磷元素释放量化方法研究  

Study on Quantitative Method of Phosphorus Release from Sediment of Urban Water Body

作　　者：田腾飞 黄鹏 刘钰 赵青 张岳 秦松岩[2] 魏德东 TIAN Tengfei;HUANG Peng;LIU Yu;ZHAO Qing;ZHANG Yue;QIN Songyan;WEI Dedong(North China Municipal Engineering Designand Research Institute Co.Ltd.,Tianjin 300074 China;Collegeof Environmental Science and Safety Engineering,Tianjin Universityof Technology,Tianjin 300380,China)

机构地区：[1]中国市政工程华北设计研究总院有限公司,天津300074 [2]天津理工大学环境科学与安全工程学院,天津300380

出　　处：《环境科学与技术》2022年第3期58-63,共6页Environmental Science & Technology

基　　金：水体污染控制与治理科技重大专项:海绵城市建设与黑臭水体治理技术集成与技术支撑平台(2017ZX07403001);住建部研发项目:水生植物水体修复问题甄别与效能提升技术(2020-K0-38)。

摘　　要：中国城市水体磷元素浓度普遍偏高,导致水体富营养化问题频发。底泥蓄存的磷向上覆水释放是水体中磷的重要来源,因此研究底泥磷元素释放规律和量化方法对水体富营养化的预测、预警以及控制措施的选择都有重要意义。采集北方城市某河道黑臭底泥,采用静态模拟实验方法测定底泥中磷的释放量,实验时间延长至1 800 h。结果表明,底泥中磷元素向水体的释放不是一次完成的,而是多次释放和吸附沉积的周期性过程。基于上述发现提出了优化量化方法测定值的建议,优化后的量化精度提高了36.07个百分点。利用ICM infoworks水质模型软件对该河道水质进行模拟,并将优化后数据引入模型,纳什系数得到明显提高,测算结果更接近实测值的平均值,模型模拟结果可信度提高。The concentration of phosphorus in urban water in China is generally high, which leads to frequent eutrophication problems. The release of phosphorus stored in sediment is an important source of phosphorus in water, so it is of great significance to study the release law and quantitative method of phosphorus in sediment to predict, early warning and selection of control measures of eutrophication. A malodorous-black sediment of a river course in northern city was collected, and the phosphorus release in the sediment was measured by static simulation method. The experimental time was extended to 1 800 h. The results show that the release of phosphorus from sediment to water is not completed at one time, but the periodic process of multiple release and adsorption deposition. Based on the above findings, the suggestion of optimal quantization method is put forward, and the optimized quantization accuracy is increased from 1.87% to 37.94%. By using the ICM infoworks to simulate the water quality of the river, and introducing the optimized data into the model, the Nash coefficient is obviously improved, the calculated results are closer to the average value of the measured values, and the reliability of the model simulation results is improved.

关 键 词：城市水体 底泥释放 吸附沉积 磷元素 周期性 水质模型 数值模拟 

分 类 号：X52[环境科学与工程—环境工程]