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The in situ in ISCR is just Latin for "in place", signifying that ISCR is a chemical reduction reaction that occurs at the site of the contamination. Like ISCO, it is able to decontaminate many compounds, and, in theory, ISCR could be more effective in ground water remediation than ISCO.
The in situ in ISCO is just Latin for "in place", signifying that ISCO is a chemical oxidation reaction that occurs at the site of the contamination. The remediation of certain organic substances such as chlorinated solvents ( trichloroethene and tetrachloroethene ), and gasoline-related compounds ( benzene , toluene , ethylbenzene , MTBE , and ...
The term hot zone was likely coined during the Cold War where it described locations rendered hazardous due to nuclear contamination. The term was later extended to areas or locations considered to be hazardous such as Level-4 biosafety labs, places in which there is active conflict, and so forth.
Soil vapor extraction (SVE) is a physical treatment process for in situ remediation of volatile contaminants in vadose zone (unsaturated) soils (EPA, 2012). SVE (also referred to as in situ soil venting or vacuum extraction) is based on mass transfer of contaminant from the solid (sorbed) and liquid (aqueous or non-aqueous) phases into the gas phase, with subsequent collection of the gas phase ...
Sulfate, on the other hand, is relatively high in abundance in comparison, so sulfate reduction is the main form of respiration after oxygen is consumed. Methanogenesis is the next form of metabolism after sulfate reduction, but was thought to begin only when all the sulfate in the sediments was reduced. [3]
Contaminants in the newly exposed zone can be removed by vapor extraction. Once above ground, the extracted vapors and liquid-phase organics and groundwater are separated and treated. Use of dual-phase vacuum extraction with these technologies can shorten the cleanup time at a site, because the capillary fringe is often the most contaminated ...
A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...
Contamination of the unsaturated zone is dangerous because of both the potential to seep into the saturated zone, where aquifers are contained, and the potential to harm ecological life. [3] Whether or not the NAPL reaches the saturated zone is determined by a parameter called residual saturation.