Navigation Links
Pesticides persist in ground water
Date:7/1/2008

Numerous studies over the past four decades have established that pesticides, which are typically applied at the land surface, can move downward through the unsaturated zone to reach the water table at detectable concentrations. The downward movement of pesticide degradation products, formed in situ, can also contribute to the contamination of ground water. Once in ground water, pesticides and their degradation products can persist for years, depending upon the chemical structure of the compounds and the environmental conditions.

Scientists at the U.S. Geological Survey (USGS) investigated the occurrence of selected pesticides and their degradation products in ground water during a study funded by the USGS National Water-Quality Assessment (NAWQA) Program. Specifically, the authors examined several of the factors that can influence the likelihood with which pesticides and their degradation products are detected in shallow ground waterincluding oxidation-reduction (redox) conditions and ground-water residence timesat four study sites across the United States. Results from the study were published in the May-June 2008 issue of the Journal of Environmental Quality.

The study revealed that the pesticides and degradation products detected most frequently in shallow ground-water samples from all four areas were predominantly from two classes of herbicidestriazines and chloroacetanilides. None of the insecticides or fungicides examined were detected in ground-water samples. In most samples, the concentrations of the pesticide degradation products greatly exceeded those of their parent compounds. Pesticides or their degradation products were detected most commonly in ground water that recharged between 1949 and 2004, and in monitoring wells spanning the full depth range (about 2 to 52 m) examinedfrom the shallowest to the deepest wellsin all four study areas. Comparisons of pesticide concentrations with a variety of environmental variables ind
'/>"/>

Contact: Sara Uttech
suttech@agronomy.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Page: 1 2

Related biology news :

1. Satellites help ensure efficient use of pesticides
2. Alternative methods proposed to detect pesticides and antibiotics in water and natural food
3. Persistent man-made chemical pollutants found in deep-sea octopods and squids
4. Using ground-penetrating radar to observe hidden underground water processes
5. Stakeholders use science to find common ground on wood supply from forests
6. Western Groundfish Conference to be held in Santa Cruz on Feb. 4-8
7. BGSU undergraduates to pilot groundbreaking genome project
8. Smart flower bulbs pull themselves to deeper ground
9. Local sources major cause of US near-ground aerosol pollution
10. Scientists from the UGR prove that rivers do not act as barriers for groundwater flow
11. Opium and marijuana research go underground
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... April 17 In the most densely forested and ... reflect two centuries of human needs, values and practices. ... clearing forests for agriculture and development, have set the ... U.S. Forest Service study reports. , The report ... and management needs in the Northern United States ...
(Date:4/17/2014)... peppers. Information about archaeological remains of ancient chili peppers ... of words for chili peppers in ancient dialects helped ... the value of multi-proxy data analysis. Their results are ... presented in a special feature issue of the ... plant and animal domestication edited by Dolores Piperno, staff ...
(Date:4/17/2014)... new modeling study suggests that fish consumption advisories ... exposure to long-lived contaminants like persistent organic pollutants ... team of researchers including University of Toronto Scarborough ... looks at how different levels of environmental contamination, ... of chemicals in the body influenced exposure in ...
Breaking Biology News(10 mins):Five anthropogenic factors that will radically alter northern forests in 50 years 2Five anthropogenic factors that will radically alter northern forests in 50 years 3Chickens to chili peppers 2Chickens to chili peppers 3Fish consumption advisories fail to cover all types of contaminants 2
... is not a word typically associated with trees; they can take ... week of Feb. 1 in the Proceedings of the National ... Eastern United States are growing faster than they have in the ... an ecosystem is responding to ,climate change. For more than ...
... Calif. Biologists have known for long that ecology, ... significant role in forming new species and in modifying ... shapes evolution. The environment defines a template and the ... fit that template. Some specialized theory, ...
... Feb. 1, 2010) -- Mapping DNase I hypersensitive ... genetic regulatory elements such as promoters, enhancers, silencers, insulators, ... to provide access for transcription factors, are selectively digested ... blots to then identify these hypersensitive sites. In ...
Cached Biology News:Ecologists discover forests are growing faster 2Ecologists discover forests are growing faster 3Evolution impacts environment, challenging traditionally held view, UC Riverside study finds 2Evolution impacts environment, challenging traditionally held view, UC Riverside study finds 3High-throughput analysis of gene regulation, DNA synthesis in Cold Spring Harbor Protocols 2
(Date:1/15/2014)... This webinar will focus on EMA and ... in biosimilars. , Regulatory frameworks are evolving many countries ... the complex nature of biopharmaceuticals makes the demonstration of ... challenging. Based on the specific aspects of biosimilar drug ...
(Date:1/15/2014)... 15, 2014 The Microcompetition with Foreign DNA ... One of these latent viruses is the Epstein Barr Virus ... Rheumatoid arthritis (RA) is a chronic inflammatory disease that destroys ... found that RA patients have high concentrations of EBV DNA ...
(Date:1/15/2014)... AudioNotch is the internet's leading provider of Notched ... tinnitus. Patients listen to sound therapy that is tailor-made ... weeks to months, their tinnitus volume decreases. , AudioNotch has ... and Notched White Noise. Now, AudioNotch is pleased to announce ...
(Date:1/14/2014)... Histogen, Inc., a regenerative medicine company developing ... simulated embryonic conditions, today announced that they have entered ... for physician-dispensed aesthetic products containing Histogen’s proprietary multipotent cell ... an amendment to the existing license between Histogen and ...
Breaking Biology Technology:Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3
... team of physicists at UC Santa Barbara has seen the ... high- and low-frequency laser beams at a semiconductor, the researchers ... then smashed back into the cores they left behind. This ... in the current issue of the science journal Nature ...
... March 30, 2012  Human Pheromone Sciences, Inc. (EROX) ("HPS" or ... Company filed a Form 15 with the SEC in order ... under the Securities Exchange Act of 1934.  Upon this voluntary ... and current reports with the SEC, including Forms 10-K, 10-Q ...
... 28, 2012   Luminex Corporation  (NASDAQ: ... vice president of Biodefense will present at ... taking place March 27-29, 2012 in Denver, Colorado. The meeting ... Joint Program Executive Office for Chemical and ...
Cached Biology Technology:UCSB Physicists mix 2 lasers to create light at many frequencies 2UCSB Physicists mix 2 lasers to create light at many frequencies 3Human Pheromone Sciences Voluntarily Files With SEC for Termination of Registration 2Human Pheromone Sciences Voluntarily Files With SEC for Termination of Registration 3Human Pheromone Sciences Voluntarily Files With SEC for Termination of Registration 4Human Pheromone Sciences Voluntarily Files With SEC for Termination of Registration 5Luminex Corporation to Speak at Joint Department of Defense and Environmental Protection Agency 5th National Bio-Threat Conference 2Luminex Corporation to Speak at Joint Department of Defense and Environmental Protection Agency 5th National Bio-Threat Conference 3Luminex Corporation to Speak at Joint Department of Defense and Environmental Protection Agency 5th National Bio-Threat Conference 4
Automated -80° C sample library for microplates and cryotube racks in SBS format; for integration into automated processes....
... PROTECT FROM MOISTURE. AVOID FREEZE/THAW CYCLES. This ... in vitro by DNA affinity-mediated ... anti-histone-facilitated detection. In this assay, mono- and ... proteins. Anti-Histone 3 (H3) biotin-labeled antibody then ...
OptiBuffer is a fully optimised medium, designed for,the electroporation of eukaryotic cells. OptiBuffer,improves both transfection efficiencies and survival,rates over PBS or other standard culture...
OmniSlide Heated Wash Module. 2 independent chambers with precise temperature control from ambient of 5C to 70C. Each chamber holds 1 slide rack (20 slides). Includes 2 x Wash Sleeves, 1 x Slide R...
Biology Products: