Disclosed are a repair adjusting system for thermal-assisted in-situ chemical oxidation and an adjusting method. The repair adjusting system for thermal-assisted in-situ chemical oxidation comprises a chemical oxidation adjusting system and a controller, the chemical oxidation adjusting system is provided with a temperature monitor, a magnetic oxidant concentration monitor, a pollutant concentration monitor and a reaction control device, the controller is respectively connected with the temperature monitor, the magnetic oxidant concentration monitor, the pollutant concentration monitor and the reaction control device, and the controller controls an oxidation process of the chemical oxidation adjusting system through the reaction control device according to output data of the temperature monitor, the magnetic oxidant concentration monitor and the pollutant concentration monitor.

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.

The present subject matter illustrates a zero-valent metal suspension in non-aqueous phase. The suspension comprises 41 wt. % of a plurality of zero-valent iron particles; 0.1 wt % of a surfactant; 36 wt. % of an oil; and 23 wt. % of a thickening agent.

Microbial reactors are provided for ammonium oxidation. Briefly, a reactor comprises a medium including an ammonium component and a Feammox bacterium and/or enzyme(s) thereof capable of oxidizing ammonium with electron transfer to an anode in contact with the medium. As described further herein, use of the anode as an electron acceptor can mitigate or overcome the disadvantages associated Fe(III) acceptor. In some embodiments, for example, ammonium oxidation in the reactor can proceed in the absence of Fe(III) and/or other metal compounds operable to function as an electron acceptor in the medium. Moreover, the medium may further comprise one more contaminants in addition to the ammonium component.

The present disclosure relates to a multipurpose casing device (MCD) which controls fluid flow in a filter casing for the primary purpose of directing contaminated fluid (e.g., groundwater) to contact treatment media inside a fluid-treatment cartridge by sealing off an annular space between the filter casing and the cartridge. The MCD assembly also permits hydraulic testing of the integrity of a barrier wall attached to a filter casing by sealing off an inlet or an outlet screen of a filter casing. The MCD assembly allows measurements of physical or chemical properties of a fluid at a specific elevation in a filter casing using hollow core tools connected to an MCD. The MCD can further be used to surge fluids through inlet and/or outlet screens of filter casing that may need to be periodically cleaned.

The present disclosure belongs to the field of environmental protection and relates to a method for remediating groundwater chlorophenols organic contamination. The method includes determining a location of a contamination source; setting up an injection well based on the location of the contamination source; and injecting a remediation reagent into groundwater in a to-be-remediated region through the injection well so as to degrade chlorophenols organic contamination in the groundwater in the to-be-remediated region.

A method and apparatus break down organic materials, typically contaminants, through oxidation. The method for the treatment of a volume of material, provides: a) introducing at least two electrodes into a location, the location containing the volume of material and the volume of material containing one or more species for treatment; b) providing connections between a voltage source and the at least two electrodes; c) applying a voltage of a first polarity to the connections for a first period of time, under the control of a voltage controller; d) applying a voltage of a second, reversed, polarity to the connections for a second period of time, under the control of the voltage controller; e) repeating steps c) and d) a plurality of times; preferably with steps c), d) and e) promoting oxidation of one or more of the one or more species for treatment.

A method for remediation of environments contaminated with halogenated organic compounds, in particular per- and polyfluoroalkyl substances, the method comprising the steps of placing a plurality of electrodes in the contaminated environment, applying an electric direct current between said electrodes, providing at least one electrically conductive reductant for halogenated organic compounds, obtaining information indicative of the electrical resistance between said electrodes, analyzing said information to detect whether at least one of said electrodes introduced a lower electric current into the contaminated environment compared to the remaining ones of said electrodes and bringing said reductant into or in close proximity to the contaminated environment in response to said detection such that the electrical resistance to the contaminated environment of at least one of said electrodes identified to introduce a lower electric current into the contaminated environment is decreased.

A permeable reactive barrier having two or more layers of a geotextile fabric inoculated with a bioremediation microbe is provided. The permeable reactive barrier further includes two or more layers of coarse-grained geological material separating the two or more layers of geotextile fabric such that any pair of adjacent layers of geotextile fabric is separated by a layer of coarse-grained geological material. The permeable reactive barrier includes a perforated metal casing surrounding and containing the layers of coarse-grained geological materials and geotextile fabric.

Technologies are described for a method of making an encapsulated reactant having a desired shape or size. The method comprises providing solid reactant particles and an encapsulating material. The encapsulating material is heated above its solidification temperature to form a molten, semi-solid, or liquid encapsulating material. The solid reactant particles are added to the molten, semi-solid, or liquid encapsulating material and mixed to disperse the solid reactant particles in the encapsulating material and form a mixture. The mixture may be extruded or formed into the desired shape or size of the encapsulated reactant, or the mixture may be solidified and extruded, granulated, shredded, ground, or pressed into the desired shape or size.