论文部分内容阅读
以2013年5月从渤海采集到的表层沉积物及水样为研究对象,对渤海中部海域汞(Hg)的空间分布规律进行分析。结果显示,沉积物中,Hg的含量为(1.058–9.256)×10~(-3)mg/kg,平均值为4.781×10~(-3)mg/kg;水体中,Hg的含量为0.005–0.240μg/L,平均值为0.090μg/L。由于沉积物的粒度组成是影响重金属元素沉积中最显著的影响因素之一,故本研究采用归一化法对Hg的“粒度效应”进行校正,并以水体中的Hg作为参照与校正结果进行对比,来分析沉积物中的Hg对周边环境造成的影响。将校正后沉积物与水体中的Hg进行相关性分析,二者相关性显著(R=0.634,P<0.001,n=29)。推测,水体中的Hg主要来自于沉积物中Hg的释放。由此可见,这种“二次污染”会对周边环境造成长期的危害,在治理的过程中需要引起重视。
Based on the surface sediments and water samples collected from the Bohai Sea in May 2013, the spatial distribution of Hg in the central Bohai Sea was analyzed. The results showed that the content of Hg in the sediment was (1.058-9.256) × 10 -3 mg / kg, the average value was 4.781 × 10 -3 mg / kg. The content of Hg in the water was 0.005 -0.240 μg / L with an average of 0.090 μg / L. Because of the particle size composition of sediment is one of the most significant factors affecting the deposition of heavy metal elements, this study uses the normalization method to correct the “particle size effect” of Hg, with Hg in water as a reference and correction The results were compared to analyze the sediment Hg impact on the surrounding environment. The correlativity between corrected sediments and Hg in water was significant (R = 0.634, P <0.001, n = 29). Presumably, Hg in water mainly comes from the release of Hg in sediments. Thus, this “secondary pollution ” will cause long-term harm to the surrounding environment, in the process of governance needs attention.