摘要
利用连续提取法研究了东部平原4个富营养化湖泊沉积物中磷的赋存特征,探讨了Fe、Al对沉积物中磷形态的影响.结果表明,富营养化程度越重的湖泊,其w(TP)(527.35～1 432.80 mg/kg)较高,w(TFe)和w(TAl)(分别为8 496.63～23 071.35和6 219.20～14 164.46 mg/kg)也较高.w(Fe)与w(Al)对各形态磷含量及分布的影响有所不同,其中对w(Fe-P)和w(Al-P)及其分布影响较大.w(Fe-P)、w(Al-P)和w(BD-Fe)之间存在相关关系,这主要与Fe、Al吸附部分沉积物释放的磷有关;w(Fe)与w(Al)对NH4Cl-P的含量及分布影响较小,而对NaOH85-P的含量及分布影响较大,w(NaOH85-P)与w(NaOH85-Fe)和w(NaOH85-Al)显著相关(P<0.01),这可能与NaOH85-P的形成机理有关.沉积物中w(TFe)/w(TP)、w(TAl)/w(TP)、Fe/P和Al/P等比值可能与湖泊富营养化程度有关,比值越小,湖泊富营养化程度越重.
A sequential extraction method was used to investigate the sediment phosphorus characteristics of four eutrophic lakes in China＇s eastern plain region and the effects of iron and aluminum on the phosphorus fractions in the sediments.The results showed that,along with the increase of eutrophic level in the lake sediments,the amounts of TP（527.35-1,432.80 mg/kg）,TFe（8,496.63-23,071.35 mg/kg） and TAl（6,219.20-14,164.46 mg/kg） increased.w（Fe） and w（Al） had different effects on the content and distribution of the different phosphorus fractions in the sediments;their effects on Fe-P and Al-P were greater.The contents of Fe-P,Al-P and BD-Fe were correlated,and were related to the absorption of phosphorus from the sediments by iron and aluminum.w（Fe） and w（Al） had little effects on the content and distribution of NH4Cl-P.However,they greatly influenced the content and distribution of NaOH85-P.Refractory phosphorus had significant correlation with w（NaOH85-Fe） and w（NaOH85-Al）（P0.01）,which may be related to the formation mechanism of w（NaOH85-P）.The ratios of w（TFe） to w（TP）,w（TAl） to w（TP）,Fe to P and Al to P may have some relationship with the eutrophication level of the lakes,with smaller ratios indicating heavier lake eutrophication.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2012年第5期556-562,共7页
Research of Environmental Sciences
基金
国家自然科学基金项目(40873079
40703017)
社会基础性工作项目(2006FY110600)
关键词
FE
AL
磷
湖泊沉积物
iron
aluminum
phosphorus
lake sediment
作者简介
王振华（1986-），女，黑龙江鸡西人，miffyaimaomao@163．com．
责任作者，王圣瑞（1972-），男，内蒙古呼和浩特人，研究员，博士主要从事湖泊富营养化研究，wangsr@crfles．org．cn
