March 28, 2013
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Soil & Groundwater Newsletter March 28, 2013 |
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| This Week´s Featured News Stories |
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New ASTM Standard for Sediment Retention Fiber Rolls
A proposed new ASTM standard is being developed to measure the basic physical properties of sediment retention fiber rolls, known as SRFRs. SRFRs are used to inhibit the migration of sediment that has been displaced and carried by flowing water. The proposed standard, WK39691, Test Methods for Determining Index Height, Diameter, Length and Mass per Unit Length of a Sediment Retention Fiber Roll (SRFR), is being developed by Subcommittee D18.25 on Erosion and Sediment Control Technology, part of ASTM International Committee D18 on Soil and Rock. According to C. Joel Sprague, senior engineer, ... | ||
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Small boost of electricity aids natural clean-up of PCB contaminants
Applying a low voltage to polluted river sediment can boost microbes’ natural ability to degrade harmful polychlorinated biphenyl (PCB) contaminants, according to a new study. The approach could be a cost-effective, sustainable strategy to bioremediate polluted sites. PCBs are persistent contaminants as they remain for long periods in the environment, particularly in water, soil and sediment. They were manufactured on a wide scale in 1970s-1980s for uses such as cooling and insulating fluids, plasticisers and stabilisers, but they became heavily restricted in many countries in the late ... | ||
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