Dredging Case Study Hudson River：哈德逊河疏浚的案例研究.pptVIP

Soil RemediationHS-Chem/SmileCorp Collaboration SmileCorp Smelting Facility located in Smileyville, NY zinc, tin and lead production recycling/recovery of metals large employer in area supply metals to many industries Our Facility In use for 50 years 50 acre site On Smileyville river recreational Near residential areas Near forested areas Smelting Byproducts Blast furnace slag considered harmless used in other products off site disposal Blast furnace stack dust containing lead Stored on site recycling disposal Past Practices Subsurface SmileCorp Options Do nothing Pump and treat Pump and treat with additive (EDTA) Lead - ligand Interaction SmileCorp Objectives Cost effective solution Least chance of fines from government or lawsuits Non-disruptive procedure HS-Chem * * Blast furnace slag may have been dumped in Smileyville river dispersed around site left in piles on site Blast furnace stack dust may not have been captured captured dust may be disposed of on site Ground water Depth to water table = 5 feet Direction of flow Depth of known lead contamination = 4.5 feet Bedrock Depth = 10 feet Ground water H20 + EDTA? H20 + Pb+2 Bedrock EDTA Pb+2 Pb+2 Soil Pb+2 Pb+2 Pb+2 Released into solution In solution “tied up” by ligand (ethylenediaminetetraacetic acid) Analyze data run experiments what will happen to lead on our site if left as is? should we consider pump and treat technology? would adding EDTA to the pump and treat system improve results? what is the best course of action for SmileCorp?