Microfluidic devices to efficiently remove particulate matter (PM) in air are provided, as are methods of fabricating and using the same. A device can include a channel having a structure configured to generate chaotic advective flow in air within the channel. The channel structure can include a plurality of SHMs disposed within the channel, where each SHM comprises a plurality of grooves each having a width of 200 μm or less and a spacing between each groove of 200 μm or less. The plurality of SHMs can be configured to introduce microvortices in air flow within the channel.

The present invention discloses a dust removal device using expansion pressure. A dust removal device using expansion pressure according to one embodiment may comprise an inlet chamber allowing mixed air including dust to flow inside and including an outlet for discharging the dust downward; a dust collecting chamber disposed at a bottom of the inlet chamber and sealed in a state of communicating with the inlet chamber and the outlet to collect the dust discharged through the outlet; a supplying pipe entering into an inside of the inlet chamber and extending toward the outlet to supply the mixed air into the inlet chamber; a first blower providing a blowing force for sucking in the mixed air and supplying the mixed air through the supplying pipe; an air exhaust duct connected to communicate with the inlet chamber to guide air separated from the dust to be discharged to outside, wherein a communication part of the air exhaust duct, which communicates with the inlet chamber, has a certain size allowing the inlet chamber to generate an expansion pressure inside, and a second blower providing a blowing force to discharge the air inside the inlet chamber to the outside through the air exhaust duct, wherein the supplying pipe and the outlet are spaced apart from each other, and a separation distance between the supplying pipe and the outlet is longer than a range that the mixed air propelled from the supplying pipe can reach to, so that the expansion pressure of the mixed air supplied to the inlet chamber accelerates separation action caused by specific gravity difference between the air and the dust.

The present invention discloses a dust removal device using expansion pressure. A dust removal device using expansion pressure according to one embodiment may comprise an inlet chamber allowing mixed air including dust to flow inside and including an outlet for discharging the dust downward; a dust collecting chamber disposed at a bottom of the inlet chamber and sealed in a state of communicating with the inlet chamber and the outlet to collect the dust discharged through the outlet; a supplying pipe entering into an inside of the inlet chamber and extending toward the outlet to supply the mixed air into the inlet chamber; a first blower providing a blowing force for sucking in the mixed air and supplying the mixed air through the supplying pipe; an air exhaust duct connected to communicate with the inlet chamber to guide air separated from the dust to be discharged to outside, wherein a communication part of the air exhaust duct, which communicates with the inlet chamber, has a certain size allowing the inlet chamber to generate an expansion pressure inside, and a second blower providing a blowing force to discharge the air inside the inlet chamber to the outside through the air exhaust duct, wherein the supplying pipe and the outlet are spaced apart from each other, and a separation distance between the supplying pipe and the outlet is longer than a range that the mixed air propelled from the supplying pipe can reach to, so that the expansion pressure of the mixed air supplied to the inlet chamber accelerates separation action caused by specific gravity difference between the air and the dust.

A waste gas purification system includes a gas container, a driver, a gas input unit, a gas output unit and a contaminant capturing apparatus. The gas input unit is for entrance of waste gas into the gas container, and is to be driven by the driver into movement. The gas output unit is for discharge of the waste gas out of the gas container after the waste gas is purified. The contaminant capturing apparatus is disposed in the gas container, and includes a capture device that purifies the waste gas by using an adhesive to adhere particulate matter in the waste gas.

A waste gas purification system includes a gas container, a driver, a gas input unit, a gas output unit and a contaminant capturing apparatus. The gas input unit is for entrance of waste gas into the gas container, and is to be driven by the driver into movement. The gas output unit is for discharge of the waste gas out of the gas container after the waste gas is purified. The contaminant capturing apparatus is disposed in the gas container, and includes a capture device that purifies the waste gas by using an adhesive to adhere particulate matter in the waste gas.

This disclosure relates to aggregating, neutralizing, and filtering ultra-fine particles in fluids such as air and water. Fluid may be drawn from an ambient environment into a neutralization chamber. Within the neutralization chamber, particles in the fluid may be agglomerated. An acoustic field may be applied to the fluid to agglomerate the particles. The agglomerated particles may be exposed to light. The light may denature or deactivate the agglomerated particles. The agglomerated and inert particles may be passed through a filter. After agglomeration and neutralization, the fluid may be released back into the ambient environment.

Methods of decontaminating bone tissue and an apparatus or system for the same are provided. The methods can be multi-batch processes and include contacting the bone tissue having contaminants with carbon dioxide to decontaminate the bone tissue and to form carbon dioxide having contaminants. The contaminated carbon dioxide is collected and the contaminants are removed to obtain purified carbon dioxide which can be recycled to treat contaminated bone tissue. The contaminated carbon dioxide can be purified by bubbling it through water and/or an organic solvent followed by acid treatment, filtering and liquefying the carbon dioxide. Contaminants that can be removed from contaminated bone tissue, and in turn, from contaminated carbon dioxide include infectious organisms, bacteria, viruses, protozoa, parasites, fungi and mold or a mixture thereof.

Methods and systems directed to the separation of tritium from an aqueous stream are described. The separation method is a multi-stage method that includes a first stage during which tritium of a tritium-contaminated aqueous stream is adsorbed onto a separation phase, a second stage during which the adsorbed tritium is exchanged with hydrogen in a gaseous stream to provide a gaseous stream with a high tritium concentration, and a third stage during which the tritium of the gaseous stream is separated from the gaseous stream as a gaseous tritium product.

A dirt collector that includes a housing and an air-permeable filter media extending from the housing such that the filter media and housing at least partially define a collection volume. The housing has an inlet opening in fluid communication with the volume and at least a portion of the housing is transmissive of infrared radiation

An eductor, a process and apparatus for gas phase polymerization of olefins in a polymerization reactor are disclosed. The process and apparatus employ an eductor which has an inlet which makes a bend of less than about 90° toward the outlet after entering the mixing chamber of the eductor.