This invention provides processes for reducing the environmental availability of one or more environmental pollutants in solids, liquids, and combinations of solids and liquids.

This invention provides processes for reducing the environmental availability of one or more environmental pollutants in solids, liquids, and combinations of solids and liquids.

A method of remediation of soil and groundwater containing hydrocarbons and halogenated compounds. The method includes introducing a remediation composition into the soil that includes: (a) a first bioremediation material including a first blend of organisms capable of degrading the hydrocarbons; (b) a second bioremediation material including a second blend of organisms differing from the first blend of organisms that is chosen for degrading the halogenated compounds; (c) an organic compound such as a complex carbohydrate (e.g., food grade starch); and (d) a third blend of organisms degrading the organic compound. The degrading of the organic compound breaks the complex carbohydrate into smaller molecules that are utilized by the microorganisms of at least one of the first and second bioremediation materials during the degrading of the hydrocarbons and the halogenated compounds. The first bioremediation composition typically includes activated carbon capable of adsorbing the hydrocarbons and the halogenated compounds.

Disclosed are methods, apparatuses and systems for the remediation of contaminated soils, groundwater, water, and/or waste using a combination of reagents. The disclosed methods may be used to treat various recalcitrant halogenated substances, such as perfluoroalkyls and polyfluoroalkyls. Particular combinations of reagents that may be used in the disclosed methods include but are not limited to: (1) persulfate, oxygen and ozone; (2) persulfate, salt, oxygen and ozone; (3) persulfate, phosphate, and/or oxygen; (4) persulfate, phosphate, oxygen and ozone; (5) persulfate, phosphate, salt and oxygen (6) persulfate, phosphate, salt, oxygen and ozone; (7) oxygen and salt; and (8) air and salt. The disclosed methods may enhance destruction of organic contaminants in the liquid phase and may also control the rate of aerosol or foam formation relative to the rate of chemical oxidation and/or reduction/transfer.

A method of remediation of polluted soil or water by chemical oxidation of organic pollutants, including adding to the soil or water separate or joined streams of aqueous iron salt solution and an acid, and injecting aqueous hydrogen peroxide solution and oxygen-containing gas to the soil or water, such that said aqueous streams and the oxygen-containing gas mix with one another in the soil or water in an acidic environment.

A high volume organic solvent polymer dispersion that is prepared by dispersing a hydrolysable polymer in a non-volatile water-soluble organic solvent, has a water content of not more than 1 mass %, and has a falling time at 50° C. of not more than 120 seconds which is measured by a Zahn cup with an orifice diameter of not more than 5 mm. Also disclosed is a method of using the high volume organic solvent polymer dispersion, which includes feeding the high volume organic solvent polymer dispersion into the ground.

According to an embodiment, there is provided a method for mitigating seawater intrusion in the ground where an aquifer having a seawater-fresh water interface is formed, the method including: installing an injection well at a point on an inland area, spaced apart from the sea by a predetermined distance, to a predetermined injection depth (d), the injection well having a predetermined screen height; injecting seawater into the aquifer by a predetermined quantity of injection through the injection well; and forming an upper seawater area around the injection well by the injection of the seawater, wherein the upper seawater area is an area that is filled with seawater in an upper portion of the aquifer.

A method of remediation of a water-bearing formation is disclosed. A first solution containing a nitrogen-containing compound and a second solution containing a nitrite-containing compound are introduced into the water-bearing formation. The two solutions intermix within the formation such that a foam is generated within the formation.

There is provided according to the present invention a sustained release reactant blend and methods for making and using the sustained release reactant blends. There is further provided methods for using such blends in the in situ or ex situ remediation of contaminated groundwater and in the treatment of water and wastewater. There is further provided, according to the present invention, methods for controllably coating reactant blends whereby such coated blends exhibit sustained release properties and have an open structure.

The invention regards a composite for environmental remediation, comprising: —one or more green rust compound(s) or green rust precursor(s), and—one or more biochar(s).