海河干流表层沉积物中磷形态的空间分布特征及其对水相磷的影响  

Spatial Distribution of Phosphorus Fractions in Surface Sediments and Its Impact on Soluble Phosphorus in Mainstream of Haihe River

作　　者：赵林[1] 方东明[1] 宋伟男[1] 姜建梅[1] 马凯[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《吉林大学学报（地球科学版）》2014年第2期603-609,共7页Journal of Jilin University：Earth Science Edition

基　　金："十一.五"国家科技支撑计划项目(2010BAC68B04)

摘　　要：为了控制水体富营养化,对沉积物中磷的分布特征进行了研究。在海河干流采集13个表层沉积物和表层水样,采用逐级提取法获得可交换态磷（NH4Cl-P）、可还原态磷（BD-P）、铁铝结合磷（NaOHP）、钙磷（HCl-P）和残渣态磷（Res-P）,分析各形态磷空间分布及其对水相（间隙水、表层水）磷的影响。结果表明：海河干流表层沉积物中总磷质量分数较高,为808.5-1 698.7mg·kg^-1,上游和下游的采样点含磷量较低,中游采样点含磷量较高;不同形态磷的质量分数差异较大,NH4Cl-P、BD-P、NaOH-P、HCl-P和Res-P的质量分数变化范围分别为8.1-31.1、41.9-84.9、151.6-348.2、312.2-819.9、226.8-1 003.0mg·kg^-1,分别占总磷（TP）的0.65%-1.85%、3.19%-6.57%、10.8%-24.34%、20.26%-52.18%、24.41%-58.33%;间隙水中总溶解性磷与沉积物中NH4Cl-P、BD-P、NaOH-P的质量分数相关性较高,相关系数分别达到0.892、0.848、0.749。研究结果表明海河内源磷释放的主要控制方向为NH4Cl-P、BDP、NaOH-P。The authors analyzed the spatial distribution of phosphorus in sediments to control the the eutrophication.Thirteen samples in surface sediment and surface water were collected,sequential extraction methods was used to acquire NH4Cl-P,BD-P,NaOH-P,HCl-P,and Res-P,and the spatial distribution characteristics of these different forms of phosphorus and their impact on soluble phosphate were analyzed.The results indicated that the contents of different P fractions in the sediments varied greatly.The total P（TP）contents ranged from 808.5to 1 698.7mg·kg^-1.Phosphorus contents in NH4Cl-P,BD-P,NaOH-P,HCl-P and Res-P ranged from 8.1to 31.1,41.9to 84.9,151.6to 348.2,312.2to 819.9and 226.8to 1 003.0mg·kg^-1,which represented 0.65%-1.85%,3.19%-6.57%,10. 8%-24.34%,20.26%-52.18%and 24.41%-58.33% of the total P,respectively.The total dissolved P of pore water has high correlation with the NH4Cl-P,BD-P,NaOH-P in sediments,with 0.892,0.848, 0.749correlation coefficient.The results showed NH4Cl-P,BD-P,NaOH-P as the main source of P release control.

关 键 词：海河 沉积物 磷 赋存形态 释放 间隙水 

分 类 号：X524[环境科学与工程—环境工程]