冰封期湿地沉积物碳、氮、磷分布及污染评价  

Distribution and pollution evaluation of carbon,nitrogen and phosphorus in sediments of lake Nanhai in Baotou City

作　　者：杨文焕[1] 崔亚楠 李卫平[1] 于玲红[1] 苗春林 樊爱萍 

机构地区：[1]内蒙古科技大学能源与环境学院,包头014010 [2]包头市生态湿地保护管理中心,包头014010 [3]包头南海子湿地保护区管理处,包头014040

出　　处：《环境化学》2018年第2期287-295,共9页Environmental Chemistry

基　　金：国家自然科学基金(41263010);内蒙古包头黄河湿地生态系统国家定位观测研究站项目(2017-LYPT-DW-007)资助~~

摘　　要：为研究冰封期湿地沉积物污染的变化规律和主要来源,采集了包头南海湿地南海湖中20个点位的沉积物,研究分析总有机碳(TOC)、总氮(TN)和总磷(TP)的空间分布特征,并对其污染进行评价.结果表明,随着采样深度的增加,沉积物污染物的含量均在逐渐降低,且在表层中累积明显;水平分布主要受进出水口、人类活动、水体流动、外源输入、沉积物-水界面物质交换等影响,呈现一定规律.沉积物中C/N均值为10.44,说明南海湖有机物主要以外源有机质为主.此外,由相关性分析得出,沉积物中TOC、TN、TP含量两两具有极显著正相关关系(P<0.01,n=20),由此说明C、N、P具有同源性.由评价结果可知,高寒旱区湖泊与其他平原浅水湖泊的碳、氮、磷沉积特征存在明显差异.In order to study the relationship and source of sediments pollution in icebound,sediment samples were collected at 20 sites in Nanhai Lake of Baotou City wetland. Spatial distribution characteristics of total organic carbon（ TOC）,total nitrogen（ TN） and total phosphorus（ TP） were analysed in order to evaluate the pollution status. The results showed that,with the increase of sediment depth the contents of pollutants decreased and accumulated in the surface layer of the sediment. Horizontal distribution was affected by inlet and outlet,human activities,water flow,exogenous input,sediment-water interface material exchange,and showed certain regularity. The C/N ratio was 10.44,which indicated that organic matter in the Nanhai Lake was mainly dominated by exogenous organic matter. Moreover,the correlation analysis showed that there were significant positive correlations between TOC,TN and TP in sediments（ P 〈 0. 01,n = 20）. Suggesting homology among carbon,nitrogen and phosphorus. Based on the pollution evaluation,there were significant differences in carbon,nitrogen and phosphorus deposition characteristics between alpineand arid hills and other plain shallow lakes.

关 键 词：湿地 沉积物 冰封期 营养盐 污染评价 包头 

分 类 号：X52[环境科学与工程—环境工程] X824