The present invention relates to a method of extracting carbon dioxide (CO.sub.2) gas from an aqueous solution comprising dissolved CO.sub.2, the method comprising: (a) contacting the aqueous solution with dissolved CO.sub.2 with an organic phase; (b) heating the aqueous solution and the organic phase to a temperature of at least 50 C., whereby the CO.sub.2 migrates from the aqueous solution to the organic phase; and (c) separating the CO.sub.2 from the organic phase, wherein the aqueous solution comprises at least 50% water by weight at a temperature of 10 C. to and a base; the organic phase has a higher CO.sub.2 solubility relative to water solubility; and the aqueous solution and the organic phase are in direct contact with each other and are maintained as two separate phases.

A system with an analyzer device in fluid communication with a sample of a bodily fluid is configured to chemically or electrochemically convert at least a portion of ammonium (NH.sub.4.sup.+) contained within the bodily fluid into ammonia (NH.sub.3) and dispel the converted ammonia (NH.sub.3) into a gas sensing chamber. An ammonia (NH.sub.3) sensor located within the gas sensing chamber in conjunction with a processor can quantify an amount of ammonia (NH.sub.3) present in the gas sensing chamber in relation to the total ammonia of the bodily fluid.

A system and method of abating air pollution and stimulating crop growth. A reagent is introduced to a crop canopy to neutralize air pollutants within said canopy, wherein the reagent induces an oxidation-reduction chemical reaction with the air pollution present throughout the acreage of crops, and by means of the reaction effectually neutralizes the harmful effects of the air pollutants on the crops. The reagent is diluted using a venturi valve or other means. The flow rate of said reagent is regulated using an electronic control unit, based on data collected from at least one type of sensor in the canopy that is in communication with the control unit.

Disclosed is a novel air purification composition with antiviral and bactericidal functions, the composition at least comprising the following components in percentage by weight: 0.3%-1% of a black poplar essential oil, 0.1%-1% of a tea tree essential oil, 0.1%-0.5% of a Cupressus funebris essential oil, 0.1%-1% of an Artemisia apiacea essential oil, 0.1%-10% of a Sophora flavescens extract, 0.1%-5% of a ginger extract, 5%-30% of a Cupressus funebris hydrolate, 0.5%-1% of a hyperbranched amino polymer, 0.5%-5% of a surfactant, and the balance being water.

Embodiments described herein provide methods of operating a linear contactor for absorbing contaminants from a gas stream. The gas stream flows from a first end to a second end of the linear contactor. Fresh absorbent is provided at the first end of the linear contactor based on the theoretical minimum amount of absorbent needed to remove the contaminants. Absorbent is recycled from the second end to the first end of the linear contactor. Fresh absorbent is provided at the second end based on chemical condition of the recycled absorbent. Apparatus for practicing the method is also described.

Embodiments described herein provide methods of operating a linear contactor for absorbing contaminants from a gas stream. The gas stream flows from a first end to a second end of the linear contactor. Fresh absorbent is provided at the first end of the linear contactor based on the theoretical minimum amount of absorbent needed to remove the contaminants. Absorbent is recycled from the second end to the first end of the linear contactor. Fresh absorbent is provided at the second end based on chemical condition of the recycled absorbent. Apparatus for practicing the method is also described.

A method for removing methane and non-methane volatile organic compound concentrations from a gas stream. The method includes exposing the target gas to a halogen gas and a light from a suitable light source having a wavelength sufficient to activate halogen gas to halogen radicals, wherein the halogen radicals react with the VOC in the target gas to provide the target gas with a removed concentration of VOC as well as a device including a reaction chamber for reacting the halogen radicals with the VOC in the target gas.

A co-current contacting system for removing impurities from a gas stream is described herein. The co-current contacting system includes a co-current contactor configured to co-currently flow a gas stream including impurities and a liquid stream through the co-current contactor. The co-current contactor is also configured to incorporate liquid droplets formed from the liquid stream into the gas stream, such that the impurities from the gas stream are absorbed by the liquid droplets. The co-current contacting system also includes a separator configured to remove the gas stream from the liquid droplets including the impurities, generating a purified gas stream and a rich liquid stream. The co-current contacting system is configured to recycle the rich liquid stream for reuse as a portion of the liquid stream flowing into the co-current contactor.

A system and method of abating air pollution and stimulating crop growth. A reagent is introduced to a crop canopy to neutralize air pollutants within said canopy, wherein the reagent induces an oxidation-reduction chemical reaction with the air pollution present throughout the acreage of crops, and by means of the reaction effectually neutralizes the harmful effects of the air pollutants on the crops. The reagent is diluted using a venturi valve or other means. The flow rate of said reagent is regulated using an electronic control unit, based on data collected from at least one type of sensor in the canopy that is in communication with the control unit.

A method for removing methane and non-methane volatile organic compound concentrations from a gas stream. The method includes exposing the target gas to a halogen gas and a light from a suitable light source having a wavelength sufficient to activate halogen gas to halogen radicals, wherein the halogen radicals react with the VOC in the target gas to provide the target gas with a removed concentration of VOC as well as a device including a reaction chamber for reacting the halogen radicals with the VOC in the target gas.