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R.I. nitrogen cycle differs in bay and sound

By Guest PostJune 4, 2014Environmentaaron nech, atmosphere, brown university, caroline champougny, denitrification, facial recognition algorithms, jodie calussi, kelly misses vlog, megaface challenge, n techlab, n2, neurolinguist, new microchip, nitrogen cycle, piton, policy making, rhode island, wwf kampagne

A new study reports that anammox, a key process in the nitrogen cycle, is barely present in Narragansett Bay even though it’s a major factor just a little farther out into Rhode Island Sound. Scientists traced that to differences between bay and sound sediments, but that raises new questions about what’s going on in the Bay to account for those.

PROVIDENCE, R.I. [Brown University] — Rhode Island’s geography is famously small, but new measurements of the nitrogen cycle in its waterways suggest that even over a small distance, differences can be huge. Scientists report that the nitrogen-converting process anammox is almost completely absent in Narragansett Bay, even though it is going strong in Rhode Island Sound only 15 miles off the coast. (more…)

New Research Shows Elevated Mercury from in-Ground Wastewater Disposal

By Guest PostMarch 15, 2014Environmentanoxic, biogeochemist, carl lamborg, chemical changes, denitrification, doug kent, east falmouth, elevated mercury, green pond, hg, human health, local groundwater, massachusetts military reservation, mercury, mmhg, monomethylmercury, organic matter, plume, toxic levels, toxic trace metal, waste eating microbes, wastewater disposal, whoi

As towns across Cape Cod struggle with problems stemming from septic systems, a recent study by a Woods Hole Oceanographic Institution (WHOI) scientist focuses on one specific toxic by-product: mercury. In a study of local groundwater, biogeochemist Carl Lamborg found microbial action on wastewater transforms it into more mobile, more toxic forms of the element.

His findings were published in Environmental Science and Technology in November 2013. (more…)

Global Rivers Emit Three Times IPCC Estimates of Greenhouse Gas Nitrous Oxide

By Guest PostDecember 21, 20103 commentsEnvironmentagriculture, atmosphere, atmospheric ozone layer, chelsea crenshaw, denitrification, dinitrogen, global, greenhouse gas, henry gholz, human activities, inert gas, ipcc, jake beaulieu, microbes, microbial process, nitrogen, nitrous oxide, oxide emissions, ozone, river networks, stratospheric, waterways

*Waterways receiving nitrogen from human activities are significant source*

What goes in must come out, a truism that now may be applied to global river networks.

Human-caused nitrogen loading to river networks is a potentially important source of nitrous oxide emission to the atmosphere. Nitrous oxide is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. (more…)

UM Advanced Bio-Filtration System Promises Less Chesapeake Pollution

By Guest PostAugust 9, 2010Environmentallen p davis, anacostia watershed, bio-filtration system, bioretention, bioretention projects, chesapeake bay, comcast center, denitrification, nitrogen, nitrogen removal, office of sustainability, phosphorous, rain gardens, runoff, scott lupin, stormwater, university of maryland, urban pollutants, urban runoff pollution

COLLEGE PARK – Technological advances developed by University of Maryland researchers promise significant reductions in urban runoff polluting the Anacostia watershed and the Chesapeake Bay. The researchers say their work represents the next generation of “low impact development” technologies.

(more…)

Tag Archives: denitrification

R.I. nitrogen cycle differs in bay and sound

New Research Shows Elevated Mercury from in-Ground Wastewater Disposal

Global Rivers Emit Three Times IPCC Estimates of Greenhouse Gas Nitrous Oxide

UM Advanced Bio-Filtration System Promises Less Chesapeake Pollution