【摘要】 本文着重探讨河流沉积物中铬的化学形态与溶出规律。用静态模拟与动态模拟实验研究了武昌巡司河底泥中铬的释放主要影响因素,测得其释放速率为5.44mg/m~2·d,即使污染河段中铬的几何均值高达344.4mg/kg,在正常水体条件下尚未构成二次污染威胁。更多还原

【Abstract】 The chromium species in sediments of urban contaminated river, a case study in the Xunsi river in Wuhan, was investigated. The distribution of chromium in sediments shows suspended matter is the major carrier of chromium in transport process.The effects on chromium releasing behavior from the Xunsi river sediments, such as pH, grain size,salt ion concentration and temperature were also studied by static and dynamic state stimulation.The results showthat,in static state,the ratio of chromium released is about 0.02 percent,while 2 percent in dynamic state with a slow release rate of 5.44 mg/m2·d.更多还原