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| UNH Engineers Seek "Multi-symptom" Remedy for Sediment Pollution more>> |
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| UNH Engineers Seek "Multi-symptom" Remedy for Sediment Pollution more>> |
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| Bradley Crannell sampling NYC's Newtown Creek which separates Queens from Brooklyn. A car crushing facility can be seen in the background. |
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| Phosphate minerals (apatite) mined for agricultural fertilizers can be used as a reactive barrier to sequester heavy metals. At 15 million years old, these teeth are one type of apatite that naturally occurs in the material. |
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| Two 6-inch layers of phosphate sand and clean sand were placed in the Anacostia River by clamshell bucket. |
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| Apatite sand (known as Phosfil) was purchased from PCS Phosphate in Aurora, North Carolina. Here it is being loaded on a barge, readying it for deployment. |
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| An on-going study comparing phosphate-based reactive barriers to several other barrier types is located on the Anacostia River in Washington, DC. |
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| Cores taken during the cap placement confirmed that the system worked well and with minimal mixing. |
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