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首页> 外文期刊>Estuarine Coastal and Shelf Science >Bioaccessibility and mobilisation of copper and zinc in estuarine sediment contaminated by antifouling paint particles
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Bioaccessibility and mobilisation of copper and zinc in estuarine sediment contaminated by antifouling paint particles

机译：防污涂料颗粒污染的河口沉积物中铜和锌的生物可及性和迁移

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Clean estuarine sediment amended with antifouling paint particles has been digested in biologically relevant reagents in order to evaluate the bioaccessibilities of Cu and Zn to deposit feeders in coastal environments where boat maintenance is important. Concentrations of Cu and Zn in the estuarine sediment of about 20 and 70 μg g~(-1), respectively, increased to about 930 and 330 μg g~(-1), respectively, on addition of 1.3% of a composite of fractionated paint particles collected from a boat repair facility. Seawater containing the vertebrate bile salt, sodium taurocholate, representative of surfactants in the digestive environment of deposit feeders, mobilised significantly greater quantities of metal (up to about 2 μg g~(-1) of both Cu and Zn) than seawater alone, presumably through complexation and exchange reactions. Seawater solutions of the protein, bovine serum albumin (BSA), a surrogate for proteinaceous material and amino acids encountered in the digestive tract, mobilised even greater quantities of metal (up to about 80 and 40 μg g~(-1) of Cu and Zn, respectively) via strong complexation, although addition of taurocholate reduced this capacity through interactions between the two reagents. Overall, and through feeding, burrowing and bioirrigation, infaunal invertebrates are predicted to greatly accelerate the rate of mobilisation and local dispersal of metals in sediment contaminated by antifouling paint particles.
机译：在生物相关的试剂中已经消解了用防污涂料颗粒改良的河口沉积物，以评估铜和锌在重要船舶维护的沿海环境中沉积给料机的生物可及性。添加1.3％的分馏复合物后，河口沉积物中Cu和Zn的浓度分别约为20和70μgg〜（-1），分别增加至约930和330μgg〜（-1）。从船舶修理厂收集的油漆颗粒。含有脊椎动物胆汁盐牛磺胆酸钠（代表沉积物进食器消化环境中的表面活性剂）的海水，其动员的金属量（单独的铜和锌含量高达约2μgg〜（-1））明显大于单独的海水。通过络合和交换反应。蛋白质，牛血清白蛋白（BSA）的海水溶液，消化道中遇到的蛋白质物质和氨基酸的替代物动员了更多量的金属（高达约80和40μgg〜（-1）的Cu和锌）分别通过强络合，尽管牛磺胆酸盐的添加通过两种试剂之间的相互作用降低了这种能力。总体而言，通过进食，挖穴和生物灌溉，预计无脊椎动物无脊椎动物将极大地加快金属的动员速度和金属在防污涂料颗粒污染的沉积物中的局部扩散。

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