融冰过程中铁离子和锰离子的迁移规律  

Migration of iron and manganese ions during ice melting

作　　者：张岩[1] 任方云 唐元庆 赵万里 赵同国 刘同帅 刘玉灿 SHEN Hung Tao ZHANG Yan;REN Fang-yun;TANG Yuan-qing;ZHAO Wan-li;ZHAO Tong-guo;LIU Tong-shuai;LIU Yu-can;SHEN Hung-tao(School of Civil Engineering,Yantai University,Yantai 264005,China;Department of Civil and Environmental Engineering,Clarkson University,Potsdam New York 13699-5710,USA)

机构地区：[1]烟台大学土木工程学院,山东烟台264005 [2]克拉克森大学土木与环境工程系,美国波茨坦13699-5710

出　　处：《中国环境科学》2021年第5期2391-2398,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(51609207);山东省重点研发计划(2019GHY112033);山东省优秀中青年科学家科研奖励基金资助项目(BS2014HZ021,ZR2017BEE016)。

摘　　要：为探究融冰过程中重金属离子的迁移规律,选择铁离子和锰离子为研究对象,开展了室内模拟融冰实验,探讨其在融冰过程中的迁移规律,并分析初始浓度和冷冻温度对其迁移过程的影响.结果表明:在不同的初始浓度和冷冻温度条件下,铁离子和锰离子在冰中各层的浓度分布关系皆为:中层<上层<下层;融冰过程中,51.17%~71.67%的铁离子和锰离子均在冰体融化前期(0~25%)集中释放,中后期相对平稳均匀释放,此外初始浓度对冰融化时铁离子和锰离子的迁移规律影响不大,而冷冻温度较低时,融1中铁离子和锰离子的浓度基本在增加;融冰过程中,随着累积融水体积的增加,融水中铁离子和锰离子的浓度与冰体初始浓度之比逐渐降低,它们之间呈指数函数衰减模式.In order to explore the migration law of heavy metal ions in the process of ice melting,indoor simulated ice melting experiments were carried out to study the migration law with iron and manganese ions as example metal ions,and the effects of initial concentration and freezing temperature on the migration process were also analyzed.The results showed that under different initial concentrations and freezing temperatures,the concentration distribution of iron and manganese ions in ice was as follows:middle layer<upper layer<lower layer;In the process of ice melting,51.17%~71.67%of iron and manganese ions were released in the early stage of ice melting(0~25%),and in the middle and late stages,iron and manganese ions were released stably and evenly.In addition,the initial concentration had little effect on the migration of iron and manganese ions during ice melting.When the freezing temperature was low,the concentration of iron and manganese ions increased basically in melt 1.In the process of ice melting,with the increase of accumulated melt water volume,the ratio of the concentration of iron ion and manganese ion in melt water to initial concentration of ice body gradually decreased,and showed an exponential function attenuation mode.

关 键 词：融冰 铁离子 锰离子 迁移规律 

分 类 号：X524[环境科学与工程—环境工程]