摘要
对天津,河北和辽宁地区沿渤海海岸沉积物进行了粒度,重金属、As、P和N的分析表明,在表层沉积物(<62.5μm粒级)中重金属和As的含量变化很大。在天津地区Hg、Cd、Cu、Ni、Pb、Zn、Cr、Mn和As的平均含量(μg/g)分别为0.15、0.19、31.6、46.5、29、112、82、1008和16.2,辽宁地区它们分别为0.08、0.44、24.2、34.1、29、96、64.4、976和13.1,在河北地区它们分别为0.03、0.13、20.3、28.7、22.7、58、63、888和8.5。天津地区Hg、Cr和As的高值(μg/g)为0.26～0.35,83.4～94.9和23.3。河北省个别地区Hg、Cd和Zn含量(μg/g)高达3.12,2.01和602。上述结果反映渤海沿岸沉积物遭受了不同程度的重金属和As的污染。天津环渤海地区表层沉积物中总氮(TN)和总磷(TP)的含量(mg/g)分别为0.7～1.5和0.7～1.0,它们在辽宁地区分别为0.5～1.0和0.5～0.7,在河北地区一般为0.6～1.2和0.5～0.8。但是,在河北个别明显遭受Hg、Cd和Zn污染地区的沉积物中TN和TP含量(mg/g)分别高达6.6和1.5,需要研究它对底栖生物的危害。
The grain size and contents of heavy metals, As, P and N of sediments have been analyzed for the environmental and sedimentological survey along the coast of Bohai Gulf. The contents of heavy metals and As in the surficial sediments less than 〈62.5μm are varied greatly. Average value of Hg,Cd,Cu,Ni,Pb,Zn,Cr,Mn and As （μg/g） along the coast of Tianjin is 0.15 ,0.19,31. 6 ,46. 5 ,29 ,112 ,82,1008 and 16.2, respectively. They are 0.08,0.44, 24.2,34. 1,29,96,64. 4 ,976 and 13.1 along the coast of Liaoning Province, and 0. 03 ,0.13 ,20. 3 ,28. 7,22. 7,58, 63,888 and 8.5 along the coast of Hebei Province. The high values of Hg,Cr and As （μg/g） along the coast of Tianjin are 0.26 -0.35,83. g 4-94.9 and 23.3. It is found that the contents of Hg, Cd and Zn in the sediment of a local site of Hebei Province are high up to 3.12, 2.01 and 602 （ μg/g）, respectively. The results described above reflect that the sediments along the coast of Bohai Gulf have been contaminated by heavy metals and As in a different degree. Contents of TN and TP （mg/g） in the sediment of the Hg, Cd,Zn-heavy contaminated site of Hebei Province are high up to 6.6 and 1.5, so that it is need further to study the toxic effect on benthic organisms.
出处
《沉积学报》
CAS
CSCD
北大核心
2008年第1期128-138,共11页
Acta Sedimentologica Sinica
基金
国家自然科学基金项目(批准号:49872044)
关键词
渤海
沉积物质量
重金属
AS
P
N
Bohai Gulf, sediment quality, heavy metals, As, P, N
