动态膜压法在长江口水域环境监测中的应用与前景探讨

Application and prospect of dynamic membrane pressure method in environmental monitoring in Changjiang Estuary

根据近海海洋环境污染的特点和污染物的种类,对水体总有机污染物的监测与评价常采用CODCr、CODMn、BOD5等方法进行监测和评价,但这些监测方法本身易造成二次污染。本文根据有机物易趋向水体表面的特性,介绍一种无二次污染的动态膜压法监测技术用于长江口水域微表层的环境监测,该方法动态表面张力的滞回环面积与COD有较好的相关性。

EODcr, CODMn, and BOD5 are three important indexes for the environmental monitoring, but they could cause the seeondary pollution. The organic substances are easily enriched on the gas-water interface and will change the surface membrane pressure. In this paper , a new green method of dynamic membrane pressure is introduced to monitor the water surface microlayer in Changjiang river estuary. The result shows that there is good linear relation between area of hysteretic loop and CODCr value.