Tag: "contaminant" at biology news
Purdue Researchers Prod Plants To Clean Up Pollution
...ebb uses tobacco seedlings to take up strontium, a contaminant
made famous by the Chernobyl accident. Strontium 90 is one of the radioactive wastes that billowed up in the smoke of the Chernobyl fire, then fell and contaminated land around the blown reactor. In humans, radioactive strontium can cause bone tumors...
Virginia Tech Engineers Help Mother Nature Clean Up
...sms for phytoremediationwill vary with the type of contaminant
and the plant species.It is also probable that the dominant mechanisms will vary fromsite to site, depending on site characteristics such as the depthto groundwater, moisture content of the soil, type of soil, organicmatter of the soil, and other loc...
Agriculture and urban activities impact water quality in the South Platte River Basin
...d that nitrate concentrations exceeded the maximum contaminant
level, or MCL, in about 48 percent of agricultural wells sampled. (A maximum contaminant
level [MCL] is a drinking-water regulatory standard that is set by the USEPA. Although the wells sa...
USGS Says Central Columbia Plateau Water Quality Impaired by Agriculture, But Some Good News
...dy. "We found nitrate levels exceeding the maximum contaminant
level in about 20 percent of all wells." (A maximum contaminant
level-or MCL-is a drinking water regulatory standard that is set by the U.S. Environmental Protectio...
Models Assess Remedial Actions On Abandoned Mine Lands In Colorado
...f contamination inthe watershed and the effects of contaminant
sources on stream waterquality as well as evaluating the effects of alternate remedial actions. The poster presentation illustrates two simulation models that may be usedto evaluate remedial actions. The modeling techniques are applied to St.Kevin G...
Can Contaminated Aquifers Restore Themselves?
...ontrol evolution of the ground-waterenvironment as contaminant
levels naturally attenuate? Can we reconcilerates for these processes observed in the laboratory with rates observed inthe field? How do physical and geochemical heterogeneities in the naturalenvironment affect attenuation processes? To what exten...
Penn State Process Removes Rocket Fuel Ingredient From Drinking Water
...chlorate haveshown that it has become a widespread contaminant
of water in the western U.S. The California Department of Health Services found 30 percent of 232 wellssampled were contaminated. The Southern Nevada Water Authority foundperchlorate in its tap water in just under action level. Perchlorate has also...
Pollution, Food Stress Take Toll On Bald Eagles
...uccess wasabout 20 per cent higher." Each contaminant
detected in birds south of the mill was below the levelestimated to cause lower nesting success. But those estimates don't take intoconsideration the effects of multiple contaminants, or food stress, says Gill. "South of the mill, there's a v...
Gritty Research Leads Scientists To Metal-Loving Discovery
...red chemically to selectively bind a wide range of contaminant
types,including radionuclides," said Jun Liu, a staff scientist at Pacific Northwest who directed thefundamental research. "And SAMMS can be used effectively in water, non-aqueous solutions or gasphase waste streams." According to Nick Lombardo, a c...
DDT, PCBs, And Invasive Plants - USGS Scientists Examine The Effects Of Contaminant And Invasive Species On Wildlife
...can serve as anon-fish-eating sentinel species for contaminant
exposure from the aquaticenvironment. ("Biomarker ... The BEST presentation will feature an overview of contaminant
exposure,effects, and trends for land animals that reside in estuarine regions in thenortheastern Un...
Subterranean Mapping Method Will Find Homes For Pollution-Eating Bacteria
... the earth. Harnessing the activity of microbes in contaminant
clean-up is the basis forbioremediation. Bacteria can immobilize or destroy hazardous chemicals inpolluted environments. To use microbes effectively, researchers need a greaterunderstanding of how they interact with their environment. Measuring ava...
Duke Study Finds More Genes May Be Affected By Toxic Cadmium
...ct to the metal cadmium, anindustrial additive and contaminant
that is toxic to humans and animals.Twenty-two are unknown genes with no previous links to cadmium exposure. The findings, by assistant professor Jonathan Freedman and doctoralstudent Vivian Hsiu-Chuan Liao of Duke's Nicholas School of Enviro...
Tracking A Legacy Of Waste In The West Siberian Basin
...oratorywere chosen to lead the U.S. portion of the contaminant
transport modeling project as part of theagreement... States. We have to beable to predict the risk of contaminant
migration in order to properly clean it up." PacificNorthwest and Russian scientists have worked t...
Unknown contaminant found in seabird eggs
...rnal's Jan. 1 print edition. Concentrations of the contaminant
were significantly higher in eggs from thePacific ...depths." This would suggest,he believes, that the contaminant
exists primarily in the surface layer of theocean. Generally, scientific thinking is that "all organ...
Solid Waste Incineration May Exceed Leaded Gasoline As Source Of Lead Air Pollution In Cities
...ork relevant to present day and future atmospheric contaminant
fluxes andrelated human exposures." The burning of municipal solid waste also "dominated the inputs of several otheratmospheric metals, including zinc, tin, cadmium, antimony and possibly silver,"Chillrud adds. The researchers are now investigating t...
New Hampshire Study Shows Well Water Has Higher Arsenic Levels Than Municipal Water
...omecases more than three times the current maximum contaminant
level (MCL) of 50parts per billion (ppb) establish...NAS report, EPA is considering lowering themaximum contaminant
level for arsenic in drinking water from 50 parts perbillion to somewhere between two to 20 ppb, say...
New methodology reduces costs of monitoring contaminated sites
...at the U. of I."Whether the goal is to contain the contaminant
or to remediate it, wells mustbe drilled at the si...ing locations that accurately quantify the mass of contaminant
in thegroundwater while minimizing monitoring costs,"Minsker said. "Reliable estimation of the conta...
UI study suggests genetics and gender affect human response to endotoxin
IOWA CITY, Iowa -- Endotoxin -- a common contaminant
of agricultural dust, airpollution and household d...ar how endotoxin causes breathing problems,but the contaminant
seems to cause inflammation through a "cascade" effect. "The endotoxin causes macrophages, the most ...
Researchers find high levels of mercury in native ore deposits
...gs to the lake. The most significant metal contaminant
found during the Michigan Techstudy is mercury. "Currently suspected sources of mercury include chlor-alkali plants,paper mills, and municipal discharges," said Harting. However, discharges frompast mining activities were distributed around 75...
...es, rather than decreases, the likelihood that the contaminant
will moveto ground water. Dr. Jon Chorover, assistant professor of environmental soil chemistry,says, "The general belief is that, as you increase the organic matter in soil,you increase the retention of contaminants. We found that that is no...
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