Univ. Reims Champagne-Ardenne, Lab. Eco-Toxicologie, BP 1039, F-51687 Reims Cedex 2, France.
Environ Pollut. 2010 Feb;158(2):476-82. doi: 10.1016/j.envpol.2009.08.034. Epub 2009 Sep 17.
Copper, a priority substance on the EU-Water Framework Directive list, is widely used to protect grapevines against fungus diseases. Many vineyards being located on steep slopes, large amounts of Cu could be discharged in downstream systems by runoff water. The efficiency of stormwater detention basins to retain copper in a vineyard catchment was estimated. Suspended solids, dissolved (Cu(diss)) and total Cu (Cu(tot)) concentrations were monitored in runoff water, upstream, into and downstream from a detention pond. Mean Cu(tot) concentrations in entering water was 53.6 microg/L whereas it never exceeded 2.4 microg/L in seepage. Cu(tot) concentrations in basin water (>100 microg/L in 24% of the samples) exceeded LC(50) values for several aquatic animals. Copper was principally sequestered by reduced compounds in the basin sediments (2/3 of Cu(tot)). Metal sequestration was reversible since sediment resuspension resulted in Cu remobilization. Wind velocity controlled resuspension, explained 70% of Cu(diss) variability and could help predicting Cu mobilization.
铜是欧盟水框架指令清单上的优先物质，被广泛用于保护葡萄藤免受真菌病的侵害。由于许多葡萄园位于陡坡上，大量的铜可能会随径流水排放到下游系统中。本研究评估了暴雨滞留盆地对葡萄园集水区中铜的截留效率。在一个滞留池的上游、进入和下游位置，监测了径流水中的悬浮固体、溶解态铜（Cu(diss)）和总铜（Cu(tot)）浓度。进入水中的 Cu(tot)浓度平均值为 53.6 微克/升，而渗漏水中的浓度从未超过 2.4 微克/升。盆地水中的 Cu(tot)浓度（24%的样本中超过 100 微克/升）超过了几种水生动物的 LC(50)值。铜主要被盆地沉积物中的还原化合物固定（占 Cu(tot)的 2/3）。由于沉积物再悬浮导致铜的重新释放，金属固定是可逆的。风速控制着再悬浮，解释了 Cu(diss)变异性的 70%，并可帮助预测铜的释放。
