Abstract: An electrochemical dechlorination of water method is provided. Dechlorination of water, containing chlorine or chloramine, is performed in an electrochemical reactor by passing electrons directly from an electrical grid to the chlorine or the chloramine via a cathode, where the dechlorination for the chlorine is defined by HOCl+2e??Cl?+OH31, and wherein the dechlorination for the chloramine is defined by NH2Cl+H++2e??Cl?+NH3. The cathode can be a stainless steel cathode. In one variation, the cathode and the anode are separated by a cation-exchange membrane. By means of this method, wastewater can be dechlorinated using power from the electric grid without the addition of external chemicals, thereby avoiding the cost of the chemicals, their transport, and the presence of their degradation products in the effluent water.

Abstract: Example implementations include a method of degrading a reactant including contacting a nonacidic solution and an anode coupled to a voltage source, contacting an acidic solution including an organic reactant and a cathode coupled to the voltage source, applying a voltage across the cathode and the anode, generating hydroxyl radical in the solution in response to the applying the voltage, and degrading the organic reactant by contact with the hydroxyl radical.

Abstract: Apparatuses for controlling emissions of carbon capture facilities and associated methods are disclosed that generally involve a chamber defining at least one washwater packing. The exemplary apparatuses further include at least one washwater return line, a UV treatment zone and a hydrogen peroxide treatment zone. The UV treatment zone generally receives UV energy sufficient to substantially destroy a first emission compound and the hydrogen peroxide treatment zone generally receives a hydrogen peroxide medium sufficient to substantially oxidize a second emission compound to a less volatile final product. An alternative exemplary apparatus generally involves a UV treatment zone and an ozonation treatment zone, further including a hydrogen peroxide treatment zone applied within the ozonation treatment zone. The exemplary methods generally include applying at least one of a UV treatment, a hydrogen peroxide treatment and an ozonation treatment.

Abstract: Apparatuses for controlling emissions of carbon capture facilities and associated methods are disclosed that generally involve a chamber defining at least one wash-water packing. The exemplary apparatuses further include at least one washwater return line, a UV treatment zone and a hydrogen peroxide treatment zone. The UV treatment zone generally receives UV energy sufficient to substantially destroy a first emission compound and the hydrogen peroxide treatment zone generally receives a hydrogen peroxide medium sufficient to substantially oxidize a second emission compound to a less volatile final product. An alternative exemplary apparatus generally involves a UV treatment zone and an ozonation treatment zone, further including a hydrogen peroxide treatment zone applied within the ozonation treatment zone. The exemplary methods generally include applying at least one of a UV treatment, a hydrogen peroxide treatment and an ozonation treatment.