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岸坡植物对受污染的城市降雨径流的净化作用

ISSN号：1003-1243
期刊名称：水力发电学报
时间：0
页码：142-147
语言：中文
分类：X522[环境科学与工程—环境工程]
作者机构：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,南京210098, [2]河海大学环境科学与工程学院,南京210098
相关基金：国家自然科学基金重点资助项日（50638020）; 河海大学自然科学基金（工科类）资助项目（2008427511）
相关项目：城市水循环过程中污染物转化规律与安全保障基础研究

关键词：水环境, 水污染防治工程, 净化作用, 正交试验, 岸坡植物, 城市降雨径流, water environment, water pollution prevention engineering, purification function, orthogonal experiment, riverbank plants, urban storm runoff

中文摘要：

根据正交试验的原理设计桶栽试验,研究岸坡植物对受污染的城市降雨径流的净化效率。24个桶栽试验装置分为八组,每组包括一个对照空白样和两个平行样。试验结果说明,有植物的试样去除污染物效果明显好于对比空白样,菖蒲比花叶芦竹具有更强的耐污染能力,花叶芦竹比菖蒲有更强的去除污染物能力。当进水为高浓度时,花叶芦竹和菖蒲对CODCr、TP、TN整体平均去除率分别为95.98%,98.11%,95.66%和96.66%,97.35%,95.72%;当进水为低浓度时,花叶芦竹和菖蒲对CODCr、TP、TN整体平均去除率分别为92.16%,96.21%,92.79%和92.08%,95.62%,92.39%。在一定程度上,去除率与污染物浓度成正相关关系。由极差分析得出：影响污染物降解因素的主次关系依次是污染负荷、水力负荷、地下水位和植物。

英文摘要：

In this work,systematic pot tests were performed to study the purification efficiency to the polluted urban storm runoff.The experiment was designed with the orthogonal method,and 24 plastic pots were divided into eight groups,each including a blank sample and two parallel samples for comparison.Results show that the purification efficiency of the plant pots is obviously better than that of no plant.Acorus calamus Linn bears more pollutants compared with Arundo donax var.versicolor,while the pollutant-removal capacity of latter is greater than the former.Under condition of high pollutant concentration the average removal rates of Arundo donax var.versicolor and Acorus calamus Linn for CODCr,TP,TN are 95.98,98.11,95.66 and 96.66,97.35,95.72 percent,respectively;under low concentration,the rates of Arundo donax var.versicolor and Acorus calamus Linn for CODCr,TP,TN are 92.16,96.21,92.79 and 92.08,95.62,92.39 percent,respectively.To some extent,there exists a positive correlation between the removal rate and pollutant concentration.By an analysis with range method,the order of importance of purification influencing factors is the concentration of pollutants,hydraulic loading,underground water table and riverbank plants.

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