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| 运河(杭州段)沉积物耗氧物质释放的模拟实验研究 | |
| 引用本文： | 朱广伟,陈英旭,周根娣,秦伯强. 运河(杭州段)沉积物耗氧物质释放的模拟实验研究[J]. 环境污染与防治, 2002, 24(4): 232-235 |
| 作者姓名： | 朱广伟 陈英旭 周根娣 秦伯强 |
| 作者单位： | 1. 中国科学院南京地理与湖泊研究所,南京,210008;浙江大学环境工程系,杭州,310029 2. 浙江大学环境工程系,杭州,310029 3. 杭州市环境保护科学研究所,杭州,310005 4. 中国科学院南京地理与湖泊研究所,南京,210008 |
| 摘 要： | 通过室内模拟试验研究了运河 (杭州段 )沉积物污染引起的上覆水 CO DCr的变化 ,并研究了连续曝气、换水清洗的方法对其耗氧物质释放的影响。结果发现由于沉积物的释放使得上覆水 CODCr浓度维持在劣四类水以上。连续曝气可以降低水体的恶臭 ,但由于曝气对沉积物的扰动引起沉积物更多地再悬浮 ,上覆水 CODC r也没有明显降低。在不考虑外源影响的情况下 ,换水清洗可以将上覆水 CODCr浓度降到 30 m g· L-1以下。本研究说明运河 (杭州段 )沉积物内源释放对上覆水 CODCr有较大的影响。 |
| 关 键 词： | 杭州段 耗氧物质释放 模拟实验 沉积物 内源释放 有机质 运河 |
Release of oxygen-depletion materials from sediment of the Hangzhou section of the grand canal, China |
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| Zhu Guangwei,et al.. Release of oxygen-depletion materials from sediment of the Hangzhou section of the grand canal, China[J]. Environmental Pollution & Control, 2002, 24(4): 232-235 | |
| Authors: | Zhu Guangwei et al. |
| Affiliation: | Zhu Guangwei,et al.Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008, |
| Abstract: | Release of oxygen|depletion materials (denoted with chemical oxygen demand, COD Cr ) from the sediments of the Hangzhou section of the Grand Canal has been studied. It showed that COD Cr content of overlying water was higher than the limitation value of the Fourth Grade of surface water quality standard. Continuous aeration abated odor of overlying water, but has not significantly decreased COD Cr concentration of it. Overlying water refreshment may decreased COD Cr concentrations lower than 30 mg5L+{-1}, regardless external loading. This study indicated that internal release maybe the major factor affecting water quality of the Hangzhou section of the Grand Canal. |
| Keywords: | Sediment Internal pollution source Organic matter Canal |
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