Dept. of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan, ROC.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2011;46(5):480-9. doi: 10.1080/10934529.2011.551727.
Polychlorinated biphenyls (PCBs) were measured in the sediments of the Donggang River Watershed, one of the most polluted bodies of water in southern Taiwan. Field data showed that detectable concentrations of 121 PCB congeners were found and total PCBs were measured in 32 out of 33 samples, and 98 congeners were detected. The total concentrations of PCBs in the sediment ranged from 25.5-63.5 ngg(-1) dw with a geometric mean ± standard deviation of 4.00 ± 1.73 ngg(-1) dw, with one sample below the detection limit. The highest concentration (20.79 ngg(-1) dw) was found at the most downstream sampling site near the head of the estuary, while average levels were highest at the tributary sampling site, ranging from 8.81-019.4 ngg(-1) dw. In general, the average concentrations in the tributary sampling sites were higher than those in the main stem sampling sites, which were 24.02 ± 10.15 and 19.97 ± 8.9 ngg(-1) dw, respectively. Among the 121 congeners, congener 1, 3, 22, 25, 33, 21, 53, 47, 41, 64, 71, 107, 136, 146, 158, 157, 200, 172, 189, 207, 205, 206, and 209 were all below the detection limit and were not found in any samples. Congeners 191, 85, and 26 were the most commonly detected, however, PCB 26, 12+13, and 52 were the most abundant congeners and contributed 11.5, 8.4, and 6.96% to the total PCBs, respectively. The results indicated that trace PCBs were still detectable in the sediment of the Donggang River and its tributaries. However, the concentrations were considerably lower than those found in other studies of nearby areas in Taiwan and around the world.
多氯联苯（PCBs）在台湾南部污染最严重的东港河流域的沉积物中进行了测量。现场数据显示，在 33 个样本中有 32 个样本中检测到了 121 种 PCBs 同系物，共检测到 98 种同系物。沉积物中 PCB 的总浓度范围为 25.5-63.5ng/g dw，几何平均值±标准偏差为 4.00±1.73ng/g dw，一个样本低于检测限。最高浓度（20.79ng/g dw）出现在河口最下游的采样点，而在支流采样点的平均水平最高，范围为 8.81-019.4ng/g dw。总体而言，支流采样点的平均浓度高于干流采样点，分别为 24.02±10.15 和 19.97±8.9ng/g dw。在所研究的 121 种同系物中，同系物 1、3、22、25、33、21、53、47、41、64、71、107、136、146、158、157、200、172、189、207、205、206 和 209 均低于检测限，未在任何样本中检出。同系物 191、85 和 26 是最常见的检出物，然而，PCB 26、12+13 和 52 是最丰富的同系物，分别占总 PCB 的 11.5%、8.4%和 6.96%。结果表明，在东港河及其支流的沉积物中仍可检测到痕量 PCBs。然而，与台湾附近地区和世界各地的其他研究相比，这些浓度要低得多。
