摘要
研究了河道底泥再悬浮状态下,底泥磷平衡浓度(EPC0)的变化规律,并分析了底泥中不同形态磷与EPC0的相关性.结果表明,底泥再悬浮可以促进上覆水中溶解性磷酸盐(SRP)向底泥迁移.与原底泥相比,底泥再悬浮预处理后,EPC0明显下降.EPC0在10d左右达到平衡状态(0.032mg/L),显著低于原底泥(0.059mg/L)与对照实验底泥(0.062mg/L).预处理后的EPC0与总磷(TP)、生物有效磷(BAP)、铁结合态磷(BD-P)呈显著负相关.因此推测,与原底泥和对照实验底泥相比,底泥再悬浮状态下形成的形态磷的性质显著改变.
The variations of equilibrium phosphate concentration (EPC0) under sediment re-suspension condition were investigated in laboratory experiments with sediments taken from the campus canal. The correlations between EPCo and the different phosphorus forms in the sediments were analyzed. Sediment re-suspension could promote the migration of soluble reactive phosphorus (SRP) from overlying water to sediments. EPC0 of re-suspended sediments was decreased obviously compared with that of the original sediments. The equilibrium state of EPC0 was reached after about 10 days for the re-suspended sediments (0.032mg/L), evidently lower than the original sediments (0.059mg/L) and the sediments in control experiment (0.062mg/L). Remarkable negative correlations were shown between the EPC0 of re-suspended sediments and its total phosphorus (TP), bioavailable phosphorus (BAP) and iron-bond phosphorus (BD-P). Therefore, it was supposed that the sediment re-suspension may obviously change the properties of sedimentary phosphorus forms.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2008年第5期476-480,共5页
China Environmental Science
基金
国家“863”项目(2003AA601070)
江苏省环境科学与工程重点实验室开放课题(ZD061202)
关键词
磷平衡浓度
磷形态
吸附
相关分析
底泥再悬浮
equilibrium phosphate concentration
phosphorus forms
adsorption
correlation analysis
sediments re-suspension