Department of Chemistry, Umeå University, SE-90187 Umeå, Sweden.
Environ Sci Technol. 2010 Mar 1;44(5):1690-7. doi: 10.1021/es9030084.
Positive Matrix Factorization (PMF) was used to identify and apportion candidate sources of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) in samples of offshore and coastal surface sediments from the Baltic Sea. Atmospheric deposition was the dominant source in offshore and pristine areas, in agreement with previous studies. Earlier chlorophenol use and a source suggested origins from pulp and paper production and related industries were identified as important coastal sources. A previously presumed major source, chlorine bleaching of pulp, was of only minor importance for modern Baltic surface sediments. The coastal source impacts were mostly local or regional, but pattern variations in offshore samples indicate that coastal sources may have some importance for offshore areas. Differences between sub-basins also indicated that local and regional air emissions from incineration or other high-temperature processes are more important in the southern Baltic Sea compared to those in northerly areas. These regional differences demonstrated the importance of including offshore sediments from the Bothnian Bay, Gulf of Finland, and other areas of the Baltic Sea in future studies to better identify the major PCDD/F sources to the Baltic Sea.
正矩阵因子分解（PMF）被用于识别和分配波罗的海近海和沿海表层沉积物中多氯二苯并对二恶英和多氯二苯并呋喃（PCDD/F）的候选源。大气沉降是近海和原始地区的主要来源，这与先前的研究一致。先前确定的氯酚使用和一个源自纸浆和造纸生产及相关行业的来源被认为是重要的沿海来源。以前假定的主要来源，纸浆的氯漂白，对现代波罗的海表层沉积物的重要性较小。沿海来源的影响主要是局部或区域性的，但近海样本中的模式变化表明，沿海来源对近海地区可能具有一定的重要性。分流域之间的差异也表明，与北部地区相比，南部波罗的海地区焚烧或其他高温过程产生的局部和区域空气排放对该地区更为重要。这些区域差异表明，在未来的研究中，包括波的尼亚湾、芬兰湾和波罗的海其他地区的近海沉积物，对于更好地确定波罗的海的主要 PCDD/F 来源非常重要。
