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��� RESEARCH �01ES <br /> I <br /> - gas through microbial denitrifieation. I resulting in"dead zones,"where little has achieved a redaction of more than <br /> The Nitrabar system is designed for aquatic life can survive.The Nitrabar 85%in the nitrate that flows through <br /> uses in agricultural locations where I project is an endeavor to stop the flow the barrier,Howard said.Though the <br /> nitrate easily accumulates in ground- of nitrogen at its agricultural source. demonstration ended in September, <br /> water and ends up in nearby rivers. At a demonstration site operat- members of the international research <br /> Excessive amounts of nitrogen in ing since early 2008 in Ballymena in team are taking the acquired knowl- <br /> waterbodies can cause algal blooms, Northern Ireland,the Nitrabar system edge and promoting it in their home- <br /> ] I lands across Europe. <br /> Howard estimated that the cost <br /> of a 100-m Nitrabar trench at$1000 <br /> to$2000,making it a low-cost,clecen- <br /> PUBUC HEALTH <br /> trahzed solution for preventing ni- <br /> trate buildups in local waters.Length <br /> and depth of the trench are variable, <br /> based on location.Howard noted that <br /> i+� ',� t THE <br /> `in many cases,the mulch used may <br /> av F� r be a waste materfal,"furthering the <br /> •�" � 4rtvan �Swh •:.t environmental stewardship of the sys- <br /> tern.For more information,see www. <br /> RI <br /> PPLE <br /> - t t _ ` ._,- nitrabar.eu.x. �M Atom Substitution <br /> Improves Water <br /> Decontamination <br /> i Sandia National Laboratories has <br /> created a new compound that re- <br /> moves bacterial,viral,and other or- <br /> ganic and inorganic contaminants <br /> from water. <br /> ' Scientists substituted an atom in <br /> the water treatment coagulant alumi- <br /> num oxide,commonly used to purify <br /> water,with an atom of gallium to cre- <br /> ate a compound that resists forming <br /> I I larger,less-reactive aggregates before <br /> 4 use.This leads to a longer shelf life <br /> than that of related products,accord- <br /> ing to a Sandia news release. <br /> The gallium atom improves stabil- <br /> ity and effectiveness of the reagent, <br /> according to Sandia principal inves- <br /> tigator May Nyman.The coagulant <br /> attracts and binds contaminants ef- <br /> fectively because it maintains its elec- <br /> trostatic charge more reliably than <br /> conventional coagulants without gal- <br /> . YOUR <br /> OUR <br /> JOBS. <br /> lium,the news release says."We've <br /> done side-by side tests with a variety <br /> of commercially available products," <br /> Nyman said."For almost every case, <br /> ours performs best under a wide <br /> O WE&T WWW.WEF.ORGJMAGAZINE <br />