O'Connor T P
National Oceanic and Atmospheric Administration, NOAA/N/OMA32, Ocean Assessments Division, Rockville, MD 20852.
Environ Health Perspect. 1991 Jan;90:69-73. doi: 10.1289/ehp.90-1519484.
Mean concentrations of PAHs, PCBs, and DDT in mollusks and sediments at sites in the National Status and Trends Program (NST) are distributed in log-normal fashion. The dry weight-based chlorinated organic concentrations in mollusks generally exceed those in nearby sediments by an order of magnitude. PAHs are found at similar concentrations in sediments and mollusks. Highest concentrations of PCBs and DDT in mollusks are in the ranges of 1000 to 4000 ng/g (dry) and 400 to 1000 ng/g (dry), respectively. The highest PAH concentrations in sediments are in the 10,000 to 50,000 ng/g (dry) range. While higher concentrations of contaminants can be found by sampling localized hot spots, the NST data represent the distribution of concentrations over general areas of the coastal United States.
国家现状与趋势项目(NST)各站点的软体动物和沉积物中多环芳烃(PAHs)、多氯联苯(PCBs)和滴滴涕(DDT)的平均浓度呈对数正态分布。软体动物中基于干重的有机氯浓度通常比附近沉积物中的高出一个数量级。沉积物和软体动物中的多环芳烃浓度相似。软体动物中多氯联苯和滴滴涕的最高浓度分别在1000至4000纳克/克(干重)和400至1000纳克/克(干重)范围内。沉积物中多环芳烃的最高浓度在10000至50000纳克/克(干重)范围内。虽然通过对局部热点进行采样可以发现更高的污染物浓度,但NST数据代表了美国沿海一般区域的浓度分布情况。