Water sample is passed through a column containing macro reticular resin, which absorbs only non ionic organic compounds. These compounds are selectively separated using aqueous eluents of varying pH, or completely exuded with small amount of an organic eluent. Ground water contains organic contamination purifier by EPA research project using GROB Closed Loop Stripping Method which identifies nearly 225 organic compounds. Various treatment options are available for removing organic contaminants from drinking water. Three of the treatment options are: granular activated carbon, air stripping, and reverse osmosis. The interim report presents general information on the use of aeration to remove volatile organic compounds from drinking water for public health reasons. Volatile organic compounds (VOCs) and petroleum products are ubiquitous groundwater contaminants. These are purified by using tray-type (ShallowTray{sup TM}) air-stripping technology which removes trichloroethylene (TCE), perchloroethylene (PCE), and total petroleum hydrocarbon (TPH). The effects of dissolved organic matter (DOM) on the transport of hydrophobic organic compounds in soil columns were investigated. three compounds (naphthalene, phenathrene, and DDT) that spanned three orders of magnitude in water solubility were used.
A process for removing organic compounds from water is disclosed. The process involves gas stripping followed by membrane separation treatment of the stripping gas. The stripping step can be carried out using one or multiple gas strippers and using air or any other gas as stripping gas. The membrane separation step can be carried out using a single-stage membrane unit or a multistage unit. Apparatus for carrying out the process is also disclosed. The process is particularly suited for treatment of contaminated groundwater or industrial wastewater.
volatile organic compounds (VOCs) can be removed used in conjunction with chemical analysis by a conventional laboratory, field-portable equipment, or a mobile laboratory. The type of mean concentration desired depends on the objectives of monitoring. For example, flow-weighted mean VOC concentrations can be used to estimate mass loadings in wastewater and urban storm water, and spatially integrated mean VOC concentrations can be used to assess sources of drinking water (e.g., reservoirs and rivers).
The ground water in this area is also known to contain hexavalent chromium that is probably naturally occurring. Therefore, LLNL has proposed ``pump-and-treat`` technology above grade in a completely closed loop system. The facility will be designed to remove the VOCs and hexavalent chromium, if any, from the ground water, and the treated ground water containing tritium will be re injected where it will decay naturally in the subsurface. Ground water containing tritium will be re injected into areas with equal or higher tritium concentrations to comply with California regulations.
A portable gas chromatograph was used to screen 32 ground water samples for volatile organic compounds. Seven screened samples were positive; four of the seven samples had volatile organic substances identified by second-column confirmation. Four of the seven positive, screened samples also tested positive in laboratory analyses of duplicate samples. No volatile organic compounds were detected in laboratory analyses of samples that headspace screening indicated to be negative. Samples that contained volatile organic compounds, as identified by laboratory analysis, and that contained a volatile organic compound present in a standard of selected compounds were correctly identified by using the portable gas chromatography. Comparisons of screened-sample data with laboratory data indicate the ability to detect selected volatile organic compounds at concentrations of about 1 microgram per litter in the headspace of water samples by use of a portable gas chromatography.
A groundwater sample from an aquifer that feeds the Colorado river was analyzed using conventional methods....