摘要
2 0 0 2年 1月在长兴岛沿岸采集了灰白冰Ⅰ号和灰白冰Ⅱ号 ,平均盐度分别为 1 94‰和 4 2 8‰ ,用灰白冰Ⅰ号做为浸泡液 ,灰白冰Ⅱ号经过破碎过 0 6cm网筛。将筛下冰块放入浸泡液中淡化 ,由于海冰破碎时盐泡也随之被击碎 ,高浓度盐水迅速向低盐度浸泡液中扩散 ,最终达到平衡。实验结果表明 ,在冰温为 -3℃左右、浸泡液用水量是淡化冰量的 2倍～ 3倍、浸泡液水温 1 0℃～ 1 4℃、浸泡时间 2min,灰白冰Ⅱ号经浸泡淡化后盐度从 4 2 8‰最低可降到 1 3 3‰。浸泡法淡化海冰能将盐分脱掉 60 %～ 70 %。影响脱盐效果的主要因素是浸泡液用量、浸泡时间、浸泡液盐度。实验结果是浸泡液与海冰的重量比 4∶1达到平衡 ,浸泡时间 2min达到平衡。浸泡液盐度达到 9 9‰时 ,高于海冰盐度平均值 2 3倍仍然有脱盐效果。海冰经浸泡后重量增加 ,平均增加 2 3 %。这个方法对固态海冰的脱盐有明显效果。如果能结合其他方法 。
Gray ice Ⅰand gray ice Ⅱ were collected from Changxing island for the experiment of desalting seaice. Average salinity of gray ice Ⅰ was 1.94‰ and that of gray ice Ⅱ was 4.28‰. By using gray ice Ⅰas the steeper, gray ice Ⅱ was soaked in the steeper after felling into pieces. Result of the experiment stated that the average salinity of gray ice Ⅱ can be reduced from 4.28‰ to 1.33‰. The method of soaking can remove the salt from the sea ice about 60%～70%. Main factors that influence the effect of desalting are the doss of steeper, the soaking time and the salinity of steeper. It will be equilibrium when the ratio of the steeper and the weight of sea ice is 4:1 and the soaking time is for 2 minutes. When the salinity of steeper reaches 9.9‰, which is 2.3 times higher than the average salinity of sea ice, the salt still can be removed from the sea ice. After soaking, the weight of sea ice will increase by 23% in average. Since this method has obvious effect on the desalting of solid sea ice, it can be applied by associating with other methods. Therefore, the technology of desalting can be approved and can reach the applied level.
出处
《资源科学》
CSSCI
CSCD
北大核心
2003年第3期33-36,共4页
Resources Science
基金
科技部"渤海海冰作为淡冰资源的可行性研究"项目
教育部科研重点项目 (编号 :0 2 0 10 )
