Millions of cubic meter of sediments are dredged annually to open channels for navigation of ships in ports and harbors. Beneficial reuse of these dredgings is typically possible upon their stabilization with calcium-rich amendments. A series of long-term laboratory column leaching tests and contaminant transport models were employed to study metal leaching behavior of bottom-sea dredged material (DM) and their blends with quarry by-products in the natural environment. Column leach tests yielded generally low or non-detectable metal concentrations. The results of the transport modeling indicated that the analyzed metals leached from the DM and the blends were below the national water quality limits at the point of entry to surface water or upon reaching groundwater. Model results showed a significant reduction in leached porewater concentrations due to adsorption and natural attenuation onto a simulated natural formation located between the DM or treated DM and the body of surface water. The overall findings showed that dredged sediments can be considered for reuse following amendment with quarry by-products.

每年疏数百万立方米的沉积物，以打开港口和港口船舶航行的通道。这些疏s物通过富含钙的改良剂稳定后，通常可以实现有益的再利用。一系列长期的实验室柱浸出测试和污染物迁移模型被用于研究自然环境中底海疏dr物料（DM）及其与采石场副产品的金属浸出行为。色谱柱浸出测试产生的金属浓度通常较低或不可检测。运移模型的结果表明，在进入地表水或到达地下水时，从DM和混合物中浸出的分析金属低于国家水质标准。模型结果显示，由于在DM或处理的DM与地表水之间的模拟自然地层上的吸附和自然衰减，浸出的孔隙水浓度显着降低。总体研究结果表明，挖出的沉积物可以在采石场副产品修正后考虑再利用。