摘要
探讨了粉煤灰中的Se^(4+)在海水中的溶出现象,找出了几种因素对Se^(4+)从煤灰中溶出浓度的影响规律.结论是如果粉煤灰中硒的溶出率在10%～20%之间,将粉煤灰投入一个封闭海域,只要固液比达到1:1000,海水中的硒含量就可达到2～3μg/L,即远远超过海水中硒含量的本底值0.03μg/L.pH=7时,盐度越高,温度越高越有利于粉煤灰中Se^(4+)的溶出,从而使硒在封闭海域溶出值远高于海水硒含量的本底值.
An experiment was carried out to study the releasing process of Se4+from the fine coal ash dumping at sea in relation with some environmental factors. The results show that the releasing rate of Se4+ is linked to the w : v ratio of fine coal ash to seawater . At pH =7, the higher salinity or temperature is, the faster the releasing of Se4+ from the ash . When the ash dissolving rate is 10%-20% and the w: v ratio is 1 : 1000, the concentration of Se4+ in seawater can reach 2-3μg/L which is far more exceeds the backgruond of Se4+ in seawater (0. 03μg/L).
出处
《海洋通报》
CAS
CSCD
北大核心
1994年第6期48-52,共5页
Marine Science Bulletin
关键词
粉煤灰
海上倾倒
固液比
浸出率
动态平衡
硒
fine coal ash dumping 5 Se4+
releasing
dynamic eqilibrium
environmental factor
