河道底泥再悬浮状态对磷平衡浓度的影响  

Influence of sediment re-suspension on the equilibrium phosphate concentration (EPC_0) of river course sediments.

作　　者：李大鹏[1] 黄勇[2] 李伟光[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]苏州科技学院环境科学与工程系,江苏苏州215011

出　　处：《中国环境科学》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)

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.

关 键 词：磷平衡浓度 磷形态 吸附 相关分析 底泥再悬浮 

分 类 号：X171.4[环境科学与工程—环境科学]