使用底栖和浮游桡足类生物测试评估沉积物修复方案的效果

三丁基锡（TBT）是一种常见于船舶防污涂料中的有机锡化合物。尽管该化学物已于2008年被禁用，但在ports和港口等海上交通区域仍可检出致毒水平（浓度）的TBT。一项补救方案在新西兰的一个港口实施，以将TBT和铜的浓度降低到可接受的（浓度）值。这项研究使用分析化学和桡足类生物测试相结合的方法评估了该方案的有效性。在港口内的三个空间梯度上采集沉积物和水样，并在修复前后测定了有机锡和金属含量。利用底栖和浮游桡足类生物测试估算了沉积物和淘析样品的毒性。虽然底泥样品的急性毒性在修复后减少，但对底栖桡足类的繁殖率仍有影响。本研究所采用的方法有望评估沿海地区修复过程的效果。

Assessing the efficacy of a sediment remediation programme using benthic and pelagic copepod bioassays

Tributyltin (TBT) is an organotin chemical commonly found in ship antifouling paints. Despite being banned in 2008, TBT continues to be found at toxic levels in areas of high maritime traffic such as ports and harbours. A remediation programme was conducted at a New Zealand port to reduce TBT and copper concentrations to acceptable values. This study assessed the efficacy of the programme using a combination of analytical chemistry and copepod bioassays. Sediment and water samples were collected at three locations across a spatial gradient within the port, and organotin and metal levels were measured pre and post remediation. The toxicity of sediment and elutriate samples was estimated by benthic and pelagic copepod bioassays. While acute toxicity in sediment samples was reduced following remediation, reproductive success was still affected for the benthic copepod. The approach used in this study is promising to assess the efficacy of remediation processes at coastal sites.