胶州湾河口沉积物中耗氧有机物的释放研究

以COD为耗氧有机物指标,通过对胶州湾海泊河河口沉积物引起的上覆海水COD变化的模拟实验,估算了耗氧有机物的释放量和释放速率,并对河口沉积物中耗氧有机物释放的影响因素和释放规律进行了研究。结果表明,胶州湾海泊河河口沉积物中耗氧有机物的释放对上覆水污染较重,泥水比、温度和溶解氧都对上覆水COD有明显影响,pH值的影响仅表现在前2 d。从总体变化趋势来看,静态海水中耗氧有机物的长期释放规律与悬浮态下的短期释放规律一致,而风干沉积物中耗氧有机物的短期释放规律用零级动力学方程拟合较好。

Organic pollutant released from estuarine sediment in Jiaozhou Bay

In this study,the release behaviors of oxygen-depletion materials,including of amount and rate,and influence conditions of organic pollutants in Haipo River estuarine sediments,which acted as the index of organic pollutants,were investigated.The results showed that the pollution of overlying water from Haipo River estuarine sediments is serious.The ratio of soils and water,temperature and dissolved oxygen have evidently influenced on COD of overlying water.However,pH value just influenced on COD within the first two days.The results also showed that the long-term release mode of oxygen-depletion materials from the estuarine sediments in static seawater was in accordance with that of short-term release mode in the suspended conditions,but the short-term release mode of air-dry sediments the zero-order kinetic model in the suspended conditions.