Group items tagged

The contamination and potential ecological risk posed by heavy metals from thirteen (13) sediment samples from different sampling sites along the lower portion of Agusan River were analyzed and assessed using different pollution indices. The results obtained shows that the total digest concentrations of different heavy metals under investigation have the following order: Cd < Pb < Zn < Mn, for both first sampling periods. The speciation and distribution pattern have shown that significant amounts of all metals are present in the residual fraction. Similarly, oxide-bound and organic-bound fractions were found to be highly important for Zn and Mn while Cd and Pb were significantly associated in the residual and exchangeable fractions. The results of different pollution indices moreover, showed that among all the heavy metals being studied, Cd posed the highest environmental risk across all sampling stations in both sampling periods and Mn metal was highly enriched and abundant in all of the sampling stations. Importantly, PCA results suggest that Zn, Mn and Pb may have the same origin while Cd might be coming from different sources, and this is corroborated well with the cluster analysis results. The results obtained from this work provide baseline data on the assessment of heavy metal pollution in the lower portion of Agusan River. Importantly, the acquired environmental indices will certainly help safety managers in assessing and interpreting the potential risk of the sediment associated chemical status that might adversely affect aquatic organisms in the selected sampling sites.

"It is rivers, roots, branches, leaves, mycelium, arteries, veins, lungs, neurons and lightning. It is in the temporal evolution of life and technology. It is both spatial and temporal, both biological and non-biological. We call this self-organizing energy-dissipating fractal 'Knowm', and it is everywhere."

The sight of butterflies flocking onto the heads of yellow-spotted river turtles in the western Amazon rain forest is not uncommon, at least if one is able to sneak up on the skittish reptiles. But the reason why butterflies congregate onto the turtles may be stranger than you think: to drink their tears. The butterflies are likely attracted to the turtles' tears because the liquid drops contain salt, specifically sodium, an important mineral that is scant in the western Amazon, said Phil Torres, a scientist who does much of his research at the Tambopata Research Center in Peru and is associated with Rice University.

ScienceDaily (Aug. 19, 2011) - A vast network of previously unmapped glaciers on the move from thousands of miles inland to the Antarctic coast has been charted for the first time by UC Irvine scientists. The findings will be critical to tracking future sea rise from climate change.

Coastline Sediment Control offers sediment control products online in NSW. They are used along with erosion control applications and help in keeping away the eroded soil on a construction site from causing water pollution in the nearby lake or river.

Roll over headlines to view top news summaries: Making Skinny Worms Fat and Fat Worms Skinny 'Exploratory' Butterflies Genetically Different Spiders Target Insects' Mate-Luring Signals Huge Natural Arch Found In Afghanistan Warm Water For Cold Winters in Northeast Ocean and River Water for Electricity Blood-Testing Device Can Spot Cancer, HIV Continuing Winter Ice Loss in Arctic Sea Plants Optimize Before Spinning Off New Species Hidden Code Reveals Brain Activity