摘要
采用钼锑抗分光光度法和连续提取法对包头南海湿地和南海湿地沿黄河边的水体和表层沉积物中总磷(TP)及各形态磷的含量进行测定,以分析其生物可利用性及释放风险,并采用APCS-MLR受体模型结合相关性分析(CA)和主成分分析(PCA)等方法进行污染源的识别并量化.结果表明:(1)研究区水体和表层沉积物中磷都处于不同程度的污染水平,其中南海湿地水体中溶解性无机磷(DIP)对水体总磷(WTP)的贡献最低,表层沉积物中钙结合态磷(HCl^(-)P)对表层沉积物总磷(STP)的贡献最大,南海湖(L区)和湿地植物区(P区)的表层沉积物具有较高的生物可利用性以及向水体释放磷的可能性,更容易发生富营养化,应引起关注.(2)APCS-MLR受体模型表明,研究区水体和表层沉积物中磷的主要污染来源为工业废水及生活污水(29.07%)和农药化肥(29.00%).此外动植物残体的降解(18.49%)也对研究区具有一定贡献.
In this study,total phosphorus( TP) and the phosphorus( P) fractions in the water and surface sediments of the Baotou Nanhai wetland in China were determined using molybdenum blue/ascorbic acid spectrophotometry and continuous extraction methods.An APCS-MLR receptor model was combined with correlation analysis( CA) and principal component analysis( PCA) to identify and quantify the pollution sources. The results showed(1) differences in the pollution level of phosphorus between the surface sediments and water. The contribution of dissolved inorganic phosphorus( DIP) to TP in the water( WTP) was the lowest,while the contribution of calcium-bound phosphorus( HCl^(-)P) to TP in the surface sediments( STP) was the largest in the study area. The surface sediments of the Nanhai Lake( L area) and the wetland plant area( P area) exhibited high bioavailability and the potential for releasing phosphorus into the water,which could result in eutrophication and is therefore of concern.(2) The APCS-MLR receptor model indicated that the main pollution sources of phosphorus were industrial wastewater and domestic sewage( 29. 07%),and pesticides and fertilizers( 29. 00%). In addition,the degradation of animal and plant residues( 18. 49%) also contributed to pollution in the study area.
作者
拜亚红
钱晨歌
袁思静
谢子嫣
来凌子
张敏
刘颖
苗春林
BAI Ya-hong;QIAN Chen-ge;YUAN Si-jing;XIE Zi-yan;LAI Ling-zi;ZHANG Min;LIU Ying;MIAO Chun-lin(College of Life and Environmental Sciences,Minzu University of China,Beijing 100081,China;Beijing Engineering Research Center of Food Environment and Health,Minzu University of China,Beijing 100081,China;Baotou Nanhai Wetland Management Office,Baotou 014040,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2021年第9期4275-4286,共12页
Environmental Science
基金
国家自然科学基金项目(21177163)
中央民族大学校级青年教师科研能力提升计划项目(2021QNPY82)
中央民族大学硕士自主科研项目(2020,硕士,SSZZKY-2020017)
中央民族大学大学生创新训练计划(BEIJ2018110034)
中央民族大学校级交叉学科研究专项(2020MDJC18)。
关键词
磷形态
生物可利用性
释放风险
定量源分析
南海湿地
phosphorus fraction
bioavailability
release risk
quantitative source identification
Nanhai wetland
