Oxygen releasing compounds in groundwater remediation

Oxygen releasing compounds in groundwater remediation

Introduction

Chemical oxidation is considered as a remediation method that allows the breaking of main organic contaminations by oxidation which is done by chemicals which are not harmful to the environment. This defines the implementation of in site chemical oxidation technologies in the case of a hydrocarbon contamination in a petrol station where the setting of bulky remediation would not be considered feasible. The insertion of oxidant compound in the soil has lessened the contamination in the matrix of the soil as well as the transfer of the reaction by the product to the ground water which assists in the method of treatment.

Discussion

The technology of remediation that is known as chemical oxidation is based over the insertion of an oxidizing agent in the environment matrix as well as through the reaction in the oxidant and organic pollutant that allows the diversion into water and carbon dioxide.

The chemical oxidation procedures are used widely for the treatment of waste water ex site initially before applying it over the site. Based over the proved efficiency over a wide range of compounds, the chemical oxidation has been considered to be successful with the insertion technique for the in site remediation of groundwater and soil (Steven, Brian, 2009).

The oxygen content of the surface water or groundwater is also dependent on the biochemical conversion processes: while in groundwater often as a result of chemical and physical processes is absorption of the oxygen, resulting in surface waters above the microbiological degradation of registered substances in water to oxygen depletion. For heavy contamination in the (ground) water is commonly observed oxygen depletion or oxygen freedom. For example, is formed under the landfill contaminated groundwater as a result of degradation processes of organic matter often an oxygen-free zone (reduction zone). Only at some distance from the stove contamination oxygen levels again reach the levels of the "normal" ground water (oxidation zone).

The oxygen saturation of the water is physically dependent on the water temperature: Cold water may (in an exponential function) take in more oxygen than warm water. In practice, therefore, the critical oxygen saturation (% in water temp.): You should be in surface water high (> 70%), with fast flowing rivers and streams due to air entry can often be observed oxygen super saturation. In contrast, groundwater from deep aquifers often occur at low oxygen levels (<50%), which occur here often iron levels above 0.1 mg / L, indicating reducing environment. Higher oxygen saturation in groundwater have an influx of little surface water filtered out; low oxygen saturation of the water often indicates the O 2-consuming mining operations down in polluted waters (Regenesis, 2013).

Advantages

ORC peroxide reacts with water and slowly release oxygen, thus promoting aerobic biodegradation of organic contaminants in groundwater. ORC groundwater biological repair main two ways: water mixed into slurry and injected into the soil saturated by the high-pressure pump, diffusion and convection dispersed into the aquifer; put into the form of a filter bag oxygen source ...