摘要
研究了贵阳市郊的阿哈湖水库中铁、锰的形态分布.结果表明,阿哈湖夏季水体剖面中存在一跃迁层(10m处),在跃迁层附近,Fe2+的含量出现峰值;DO含量大幅减小;活性锰和总锰的含量在跃迁层上方各剖面中相差不大,在跃迁层至剖面底部,它们的含量均增加,但总锰增长的速度更快,各剖面中活性锰的含量是总锰的10%左右.就氧化还原因素在铁、锰相互作用的过程来看,阿哈湖水体剖面可分为3个不同部分,表层到跃迁层处,由于受外界条件的影响,铁、锰相互作用程度很弱;在跃迁层至19m处,Fe2+含量相对跃迁层上方含量大为增加,Fe2+在锰的各形态转化中作用明显,活性锰含量随Fe2+含量快速增加而增加;在19m处到剖面底部25m处,活性锰的含量与19m处相差不大,达到最大值,并保持平衡,Fe2+的还原作用已不是锰的各种形态迁移转化过程中的主控因素.
The form distribution of the iron and manganese in the A-Ha Lake near the Guiyang City were studied. A chemocline（10m） existed in the lake water profile. In the vicinity of the chemocline, the ferrous concentration gave a sudden rise together with the opposite phenomenon happened to the concentration of oxygen. The concentrations of the active and total manganese showed no apparent difference in the upper chemocline. However, they both increased from the chemocline to the lake bottom, the concentration of the active manganese was 10 percent of the total manganese since the active manganese increased more gently. As far as the factors of the redox concerned in the process of the reciprocal reaction between the iron and manganese, the whole profile of the A-Ha Lake might be divided into three departments. From the surface layer to the chemocline, the reciprocal reaction was inert. The concentration of the active manganese rose sharply in the distinct reductive area from the chemocline to profile of 19m with rise of the ferrous concentration. The concentration of the active manganese reached to a plateau from 19m profile to the bottom profile, the reductive function of the ferrous ions might be no longer the main controling factor during the process of transformation of the different form of the manganese.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2006年第B07期83-86,共4页
China Environmental Science
基金
国家杰出青年基金项目(40525011)
国家青年基金项目(40403011)
中国科学院创新团队国际合作伙伴计划项目
关键词
铁
锰
剖面分布
跃迁层
形态分析
阿哈湖
iron
manganese
distribution inprofile
speciationanalysis
chemocline
A-Ha Lake
