摘要
以松花江哈尔滨段底泥沉积物为实验对象,研究松花江底泥沉积物中重金属的释放规律,使用循环槽(circulating flume)模拟松花江水力学条件,考察了重金属在上覆水和底泥中的沉积和释放。结果表明:松花江哈尔滨段底泥沉积物中重金属只有镉(Cd)超标,其它检测出重金属没有超标;随着温度升高,沉积物重金属溶出释放量也随之增加;重金属在酸性条件下的释放量明显高于碱性条件下的释放量;水体盐度升高,沉积物重金属的溶出释放也随之升高;水体扰动达到160 r/min时,重金属的释放达到最高值。
In this paper, sediment of Harbin section of Songhua River was collected as the target to study the release rule of heavy metals in the sediment. Circulating flume was used to simulate the hydraulic conditions of Songhua River and investigate the sedimentation and release of heavy metals in the supernatant and sediment of Harbin section of Songhua River. The results showed that only Cd exceeded the standard limit and other heavy metals were within the limit range. The release quantity of heavy metals increased with the raise of temperature or salinity. It also increased at acid condition rather than at alkaline condition. Moreover, heavy metals was released maximally under the water turbulent condition of 160 r/min
出处
《环境保护科学》
CAS
2016年第2期85-89,102,共6页
Environmental Protection Science
基金
国家水体污染控制与治理科技重大专项(2013ZX07000000-005-003)
城市水资源与水环境国家重点实验室自主课题(2013DX06)基金资助
关键词
松花江底泥
重金属
重金属释放
Sediment of Songhua River
Heavy Metal
Heavy Metal Release
