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Polluted ground water poured into a model
April 19, 2006Dutch researcher Phil Ham has developed mathematical models to calculate the natural degradation capacity of polluted groundwater. As a result of this, it can now be predicted whether a polluted area will become larger or smaller. In the latter case, expensive remediation methods can be avoided.
Groundwater under contaminated sites, such as waste disposal sites and industrial areas, is often polluted. Such a polluted groundwater plume can grow, shrink or remain stable due to an interplay between physical, chemical and biological processes.
Phil Ham has devised mathematical expressions to determine the size of a plume and to assess the natural degradation capacity of contaminated sites. His analytical models calculate the reactive transport of dissolved matter in water through porous soil and the characteristics of the mixing processes. Such a scientifically-supported method had not previously been available.
Within the world of engineering there is a high demand for mathematical models that allow accurate predictions to be made. If it can be calculated whether a plume will decrease in size or remain stable, invasive and expensive remediation methods can possibly be avoided.
The results of this study enable predictions to be made about the effectiveness of natural degradation as a responsible alternative to aquifer remediation.
Netherlands Organisation for Scientific Research
Within the world of engineering there is a high demand for mathematical models that allow accurate predictions to be made. If it can be calculated whether a plume will decrease in size or remain stable, invasive and expensive remediation methods can possibly be avoided.
The results of this study enable predictions to be made about the effectiveness of natural degradation as a responsible alternative to aquifer remediation.
Netherlands Organisation for Scientific Research
Nanoparticles assemble by millions to encase oil drops
In a development that could lead to new technologies for cleaning up oil spills and polluted groundwater, scientists at Rice University have shown how tiny, stick-shaped particles of metal and carbon can trap oil droplets in water by spontaneously assembling into bag-like sacs.
Beach pollution is worst during new and full moon
A new study of 60 beaches in Southern California suggests that water pollution varies with the lunar cycle, reaching the highest levels when tides are ebbing during the new and full moon.
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Inoculation of a submerged filter for biological denitrification of nitrate polluted groundwater: a comparative study [An article from: Journal of Hazardous Materials] by B. Moreno (Author), M.A. Gomez (Author), J. Gonzalez-Lopez (Author), Hontoria (Author) This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Activated sludge from a wastewater treatment plant and pure culture of Hydrogenophaga pseudoflava were utilized for the development of a denitrifying biofilm in a submerged filter in order to remove nitrate from polluted groundwater. Nitrate removal efficiency, nitrite accumulation, turbidity, COD and faecal indicators persistence in the treated water were determined at different superficial hydraulic loading (10, 20 and 30m^3/m^2d) and superficial nitrate loading rates (1, 2, 3, 6 and 9Kg NO"3^-/m^2d)... |
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Treatment of groundwater polluted by arsenic compounds by zero valent iron [An article from: Journal of Hazardous Materials] by H. Sun (Author), L. Wang (Author), R. Zhang (Author), J. Sui (Author), G. Xu (Author) This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser. Description: Batch experiments were carried out to study the kinetics and efficiency of inorganic arsenic removal by zero valent iron (ZVI) powder, and as well as the effects of pH, anions, and humic material (HM) on this process. Moreover, column experiment was conducted for 31 days to treat arsenate solution of 500@mgAs/L using waste iron chippings as filling. Batch experiments showed that both arsenate and arsenite compounds could be removed efficiently from simulated groundwater by ZVI under aerobic and relative... |
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Polluted groundwater: A review of the significant literature by David Keith Todd (Author) | |
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