A low-cost method of removing phosphates from tile drainage water has been developed, and may help protect lakes and streams. Using steel byproducts to trap phosphates in simulated tile drainage water, the researchers envision installing a steel-containing cartridge as an add-on to nitrate-capturing bioreactors.
http://www.sciencedaily.com/releases/2015/09/150923134444.htm
Protecting lakes, streams by removing phosphates as well as nitrates
23 septiembre 2015
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