Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO.sub.2 with a second stream comprising (ClO.sub.2).sup.0 to provide a third stream comprising NO and NO.sub.2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO.sub.2 to MNO.sub.2.

Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO.sub.2 with a second stream comprising (ClO.sub.2).sup.0 to provide a third stream comprising NO and NO.sub.2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO.sub.2 to MNO.sub.2.

The disclosure provides seven integrated methods for the chemical sequestration of carbon dioxide (CO.sub.2), nitric oxide (NO), nitrogen dioxide (NO.sub.2) (collectively NO.sub.x, where x=1, 2) and sulfur dioxide (SO.sub.2) using closed loop technology. The methods recycle process reagents and mass balance consumable reagents that can be made using electrochemical separation of sodium chloride (NaCl) or potassium chloride (KCl). The technology applies to marine and terrestrial exhaust gas sources for CO.sub.2, NOx and SO.sub.2. The integrated technology combines compatible and green processes that capture and/or convert CO.sub.2, NOx and SO.sub.2 into compounds that enhance the environment, many with commercial value.

The disclosure provides seven integrated methods for the chemical sequestration of carbon dioxide (CO.sub.2), nitric oxide (NO), nitrogen dioxide (NO.sub.2) (collectively NO.sub.x, where x=1, 2) and sulfur dioxide (SO.sub.2) using closed loop technology. The methods recycle process reagents and mass balance consumable reagents that can be made using electrochemical separation of sodium chloride (NaCl) or potassium chloride (KCl). The technology applies to marine and terrestrial exhaust gas sources for CO.sub.2, NOx and SO.sub.2. The integrated technology combines compatible and green processes that capture and/or convert CO.sub.2, NOx and SO.sub.2 into compounds that enhance the environment, many with commercial value.

An ozonation-based method for producing a cementitious material comprises the steps of: (1) mixing a flue gas with an ozone-containing gas to form a mixed flue gas; and introducing the mixed flue gas into an absorption tower, where the mixed flue gas undergoes dry desulfurization and denitrification by reacting with a powdered desulfurizing and denitrificating agent and becomes a treated flue gas; (2) subjecting the treated flue gas to dust removal to generate by-products; and (3) uniformly mixing raw materials that comprise the first by-product, magnesium oxide, fly ash and an additive to give a cementitious material, wherein on the basis of 100 parts by weight of the cementitious material, the first by-product is 20-60 parts by weight, magnesium oxide is 16-33 parts by weight, the fly ash is 15-35 parts by weight, and the additive is 1-15 parts by weight.

The present disclosure provides a cementitious material and production method thereof. The method comprises steps of: (1) dry desulfurization and denitrification of a flue gas with a flue gas absorbent to give a by-product, wherein the flue gas absorbent comprises 10-23 parts by weight of a nano-sized metal oxide, 10-23 parts by weight of a micro-sized metal oxide, and 40-60 parts by weight of magnesium oxide, the nano-sized metal oxide being selected from one or more of the group consisting of SiO2, CaO, Fe2O3, Al2O3, CuO, V2O5 and MnO2, and the micro-sized metal oxide being selected from one or more of the group consisting of SiO2, CaO, Fe2O3, Al2O3, CuO, V2O5 and MnO2; and (2) uniformly mixing the by-product with magnesium oxide, an industrial solid waste and an additive to give the cementitious material.

The present disclosure provides a cementitious material and production method thereof. The method comprises steps of: (1) dry desulfurization and denitrification of a flue gas with a flue gas absorbent to give a by-product, wherein the flue gas absorbent comprises 10-23 parts by weight of a nano-sized metal oxide, 10-23 parts by weight of a micro-sized metal oxide, and 40-60 parts by weight of magnesium oxide, the nano-sized metal oxide being selected from one or more of the group consisting of SiO2, CaO, Fe2O3, Al2O3, CuO, V2O5 and MnO2, and the micro-sized metal oxide being selected from one or more of the group consisting of SiO2, CaO, Fe2O3, Al2O3, CuO, V2O5 and MnO2; and (2) uniformly mixing the by-product with magnesium oxide, an industrial solid waste and an additive to give the cementitious material.

Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO.sub.2 with a second stream comprising (ClO.sub.2).sup.0 to provide a third stream comprising NO and NO.sub.2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO.sub.2 to MNO.sub.2.

Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO.sub.2 with a second stream comprising (ClO.sub.2).sup.0 to provide a third stream comprising NO and NO.sub.2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO.sub.2 to MNO.sub.2.

A device for recovering polluted air is disclosed. The device includes air collecting part, a main control part, a discharging part, and an air sending pipe. The air collecting part includes a cover body, a lower side of which is opened, and a filter member attached to an inside of the cover body. The main control part includes a pump capable of sucking and delivering gas. The discharging part including an air storage container to be installed in the sea. The air sending pipe couples between the air collecting part and the main control part and between the main control part and the discharging part to permit movement of the gas between the parts. The gas that is polluted air is sucked from the air collecting part by the pump and is delivered to the discharging part, and the gas is discharged from the air storage container into the sea.