非稳沉采煤沉陷区沉积物-水体界面的氮、磷分布及迁移转化特征  

Distribution and migration characteristics of nitrogen and phosphorus in sediment-water interface from unstable coal mining subsidence area

作　　者：郑刘根[1] 刘响响 程桦[1] 姜春露[1] 陈永春 

机构地区：[1]安徽大学资源与环境工程学院矿山环境修复与湿地生态安全协同创新中心,合肥230601 [2]煤矿生态环境保护国家工程实验室,淮南232001

出　　处：《湖泊科学》2016年第1期86-93,共8页Journal of Lake Sciences

基　　金：国家科技支撑计划项目(2012BAC10B02);国家自然科学基金项目(41373108);煤矿生态环境保护国家工程实验室科技攻关项目(HKKY-JT-JS2012);安徽省自然科学基金项目(1208085ME66);安徽省教育厅重点基金项目(KJ2012A022)联合资助

摘　　要：以淮南后湖非稳沉采煤沉陷区沉积物-水体界面为研究对象,分析该湖未开发区(A区)、水产养殖区(B区)和水生蔬菜种植区(C区)3个功能区上覆水-间隙水-沉积物体系中氮、磷分布及其迁移特征.结果表明,氮、磷在不同水体界面的分布差异较大.其中上覆水中氮、磷浓度表现为A区>B区>C区;间隙水中氮、磷分布差异不显著,然而各功能区间隙水的氮、磷浓度明显高于上覆水,氮、磷主要由间隙水向上覆水中移动;沉积物中氮、磷含量以C区最高.后湖采煤沉陷区水体表现出氮污染、磷限制的现象.Three water bodies of different functionalities,i. e.,undeveloped（ A）,aquaculture（ B）,and aquatic vegetable planting（ C）,in Lake Houhu unstable coal mining subsidence area,were studied to address the distribution and migration of nitrogen and phosphorus in a column system of overlying water column,sediment pore water and sediments. The results showed that the contents of nitrogen and phosphorus were quite different in different sediment-water interface. The concentrations of nitrogen and phosphorus in overlying water column were in the order of A B C. Although no significant difference in concentrations of nitrogen and phosphorus in pore waters of these three water bodies were observed,they were distinctly higher than those in overlying water columns. This suggested an upward migration of nitrogen and phosphorus from pore waters to overlying water columns. The highest concentrations of nitrogen and phosphorus were examined in the sediments of aquatic vegetable planting water body. Overall,the study found that water bodies were polluted by nitrogen but had limited availability of phosphorus.

关 键 词：采煤沉陷水体 上覆水 间隙水 沉积物 氮 磷 后湖 

分 类 号：X524[环境科学与工程—环境工程]