摘要
选取东北地区典型湖泊五大连池为研究对象,采用连续提取方法测定了磷酸二钙（Ca2-P）、磷酸八钙（Ca8-P）、磷灰石（Ca10-P）、铝磷（Al-P）、铁磷（Fe-P）和闭蓄态磷（O-P）,研究了表层沉积物中不同形态磷的含量及各形态磷之间的相关性。结果表明,沉积物中总磷含量在519 mg/kg～1 338.03 mg/kg之间,其中铁磷（Fe-P）是沉积物总磷中含量最高的组分,约占总磷的34.73%-56.57%,其它各形态磷组分的含量大小依次为Org-P〉Ca10-P〉O-P〉Ca2-P〉Al-P〉Ca8-P。磷素活化系数（PAC）表明,各池沉积物总磷均易转化为有效磷,说明具有较高的生物可利用磷的潜能。各磷素组分相关性分析表明,沉积物TP与有效磷显著正相关,Fe/Al-P对沉积物TP的影响较大,而活性较高的Ca2-P与Fe-P、Al-P和沉积物TP显著正相关。
Wudalianchi,the group of freshwater lakes in Northeast China were surveyed regarding phosphorus fractions in the surface sediments.A sequential extraction procedure was adopted to investigate Ca2-P,Ca8-P,Ca10-P,Al-P,Fe-P and O-P;amount of different P species and correlation among the P species were studied.Results showed the range of TP concentrations in the surface sediments and revealed that content of Fe-P was the highest,accounting for 34.73%～56.57%;the order of magnitude in terms of contents of different P species was identified.As to phosphorus activation coefficient（PCA）,it was showed in all the sediment samples that TP was easily transformed into Olsen-P,which implied the great potential for bio-available phosphorus.It was also found that Fe-P and Al-P had much more influence on TP amount in sediments and Ca2-P that was more active than other species was positively correlated with Fe-P,Al-P and TP.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第9期95-99,140,共6页
Environmental Science & Technology
基金
水体污染控制与治理科技重大专项课题(2009ZX07106-001)
国家科技支撑计划课题(2007BAD87B03)
关键词
五大连池
沉积物
磷
形态
Wudalianchi
sediment
phosphorus
speciation
