不同水动力下湖泊沉积物重金属释放通量

发布时间：2018-01-13 08:06

本文关键词：不同水动力下湖泊沉积物重金属释放通量　出处：《农业工程学报》2016年S1期 　论文类型：期刊论文

【摘要】：为探讨不同水动力下湖泊沉积物重金属释放通量,该文在室内可循环式水槽试验中模拟了动水条件下沉积物的运动,试验时通过控制闸门开关改变水槽内水体流速,探讨了不同水动力下沉积物的悬浮与释放规律。以鄱阳湖沉积物为水槽试验沉积物,通过分析沉积物中Cu、Zn、Cd、Pb浓度的变化,建立了当沉积物粒径为50~200μm时,沉积物中Cu、Zn、Cd、Pb释放通量与流速的关系式。结果表明:释放通量随水体流速增大呈指数增长,当流速分别为15、35、65 cm/s时,Cu释放通量分别为45.82、65.18、127.16 mg/(m~2·d);Zn为104.35、139.82、220.5 mg/(m~2·d);Cd为0.116、0.163、0.28 mg/(m~2·d);Pb为4.78、6.72、11.57 mg/(m~2·d),鄱阳湖水体重金属浓度计算值与实测值误差在5%~20%范围内。研究结果可为湖泊重金属污染控制及治理提供科学依据。
[Abstract]:To explore the effect of different water power under the lake sediment heavy metal release flux, the circulating flume experiments were simulated in the sediments under the water movement in the indoor test, through a control gate switch to change the velocity of water flow in the flume, discusses the different hydrodynamic suspension sinking sediments and releasing of sediments in Poyang Lake. For the flume experiment through the analysis of sediment, sediment Cu, Zn, Cd, Pb concentration changes, is established when the sediment particle size of 50~200 m, Cu Zn, Cd in the sediments, and relationship between Pb flux and velocity. The results showed that the release flux increases exponentially with the water flow rate increases, when the flow rate respectively. 15,35,65 cm/s, 45.82,65.18127.16 mg/ Cu flux respectively (m~2, d); Zn 104.35139.82220.5 mg/ (m~2 d); Cd 0.116,0.163,0.28 mg/ (m~2 d); Pb 4.78,6.72,11.57 mg/ (m~2 d), Poyang Lake water heavy metals The calculated value and the measured value are within the range of 5%~20%. The results can provide a scientific basis for controlling and controlling the pollution of heavy metals in lakes.

【作者单位】：江西水利职业学院;江西省水利科学研究院;河海大学浅水湖泊综合治理与资源开发教育部重点试验室;
【基金】：国家自然科学基金项目(51309082)
【分类号】：X524
【正文快照】： 3.河海大学浅水湖泊综合治理与资源开发教育部重点试验室,南京210098)陆健刚,钟燮,吴海真,王华.不同水动力下湖泊沉积物重金属释放通量[J].农业工程学报,2016,32(Supp.1):248-253.doi:10.11975/j.issn.1002-6819.2016.z1.034 http://www.tcsae.orgLu Jiangang,Zhong Xie,Wu Ha

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