What is oxidation injection?
From Enviro Wiki. Chemical Oxidation is an in situ remediation technology that can be applied to groundwater or soils and many different contaminants. It is a chemical technology where strong oxidants are injected or mechanically mixed into the treatment zone to promote destructive abiotic degradation reactions.
What is meant by chemical oxidation?
Chemical oxidation is a process involving the transfer of electrons from an oxidizing reagent to the chemical species being oxidized. In water and wastewater engineering, chemical oxidation serves the purpose of converting putrescible pollutant substances to innocuous or stabilized products.
What is ISCO remediation?
In situ chemical oxidation, also referred to as ISCO, is an aggressive remediation technology that has been applied to a wide range of volatile and semivolatile hazardous contaminants, including DNAPL source zones and the dissolved-phase chemicals emanating from the source zones.
Is chemical oxidation expensive?
Although chemical oxidation for complete mineralization of pollutants is usually costly, its combination with biological treatment has been reported to reduce the overall operating costs [2].
What happens during chemical oxidation?
Oxidation is defined as a process in which an electron is removed from a molecule during a chemical reaction. In other words, during oxidation, there is a loss of electrons. There is an opposite process of oxidation known as a reduction in which there is a gain of electrons.
What compounds can be oxidized?
Alcohols may be oxidized to give ketones, aldehydes, and carboxylic acids. These functional groups are useful for further reactions; for example, ketones and aldehydes can be used in subsequent Grignard reactions, and carboxylic acids can be used for esterification. Oxidation of organic compounds generally…
What happens during oxidation?
What causes oxidation?
Oxidation is the reaction caused by contact between substances and oxygen molecules. Such substances may be metals or non-metals, such as living tissues. In short, it can be described as an atom’s enhanced oxidation state via a chemical reaction.
What is in situ injection?
In Situ chemical oxidation (ISCO) involves the injection or direct mixing of reactive chemical oxidants into groundwater and soil for the primary purpose of rapid and complete contaminant destruction.
How long does pump and treat take?
Pump-and-treat systems often take a very long time (e.g., 50 -100 years) to meet cleanup goals, and in many cases they are never expected to ever achieve those goals. Pumping depresses the groundwater level, leaving residuals sorbed to the soil.
What is oxidation in water treatment?
Oxidation is the driving force for many water and wastewater treatment solutions. These radicals are the primary oxidants that carry out this process, breaking down compounds into intermediates and then mineralizing those intermediates into simple compounds like water, carbon dioxide, and salts.
What is the purpose of oxidation?
Oxidation reduces the biochemical oxygen demand (BOD) of wastewater, thus, the toxicity of some impurities. In this treatment, some impurities are converted to carbon dioxide, water, and bio-solids. Chemical oxidation is also frequently used for disinfection.