Tsunemasa Noritaka, Yamazaki Hideo
Environmental Conservation Division of the Environment Bureau, Hiroshima City, 1-6-34 Kokutaiji-Machi, Naka-ku, Hiroshima 730-8586, Japan.
School of Science and Engineering, Department of Life Science, Kinki University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan.
Int J Mol Sci. 2014 Jun 4;15(6):9991-10004. doi: 10.3390/ijms15069991.
Accumulation of Ot alternative antifoulants in sediment is the focus of this research. Much research had been done on surface sediment, but in this report, the accumulation in the sediment core was studied. The Ot alternative antifoulants, Diuron, Sea-Nine211, and Irgarol 1051, and the latter's degradation product, M1, were investigated in five samples from the northern part of Hiroshima Bay. Ot compounds (tributyltin (TBT) and triphenyltin (TPT)) were also investigated for comparison. In addition, metal (Pb, Cu, Zn, Fe and Mn) levels and chronology were measured to better understand what happens after accumulation on the sea floor. It was discovered that Ot alternative antifoulant accumulation characteristics in sediment were like Ot compounds, with the concentration in the sediment core being much higher than surface sediment. The concentration in sediment seems to have been affected by the regulation of Ot compounds in 1990, due to the concentration of Ot alternative antifoulants and Ot compounds at the survey point in front of the dock, showing an increase from almost the same layer after the regulation.
Ot替代防污剂在沉积物中的积累是本研究的重点。此前已经对表层沉积物进行了大量研究，但在本报告中，研究的是沉积物柱状样中的积累情况。在广岛湾北部的五个样本中，对Ot替代防污剂敌草隆、Sea - Nine211和烯草酮1051及其降解产物M1进行了研究。还对Ot化合物（三丁基锡（TBT）和三苯基锡（TPT））进行了研究以作比较。此外，测量了金属（铅、铜、锌、铁和锰）含量及年代顺序，以便更好地了解在海底积累后会发生什么。研究发现，沉积物中Ot替代防污剂的积累特征与Ot化合物相似，沉积物柱状样中的浓度远高于表层沉积物。沉积物中的浓度似乎受到了1990年Ot化合物管制的影响，因为码头前调查点的Ot替代防污剂和Ot化合物浓度在管制后从几乎相同的层位开始呈现上升趋势。
