A method of separation of predetermined gas from the mixture of gases or an atmosphere, wherein said method of separation of predetermined gas from a mixture of gases or an atmosphere comprises passing a mixture of gases or an atmosphere through the reinforced mass selective fluid bandpass filter (8). The reinforced mass selective fluid bandpass filter comprises the mass selective fluid bandpass filter element (9) permanently affixed to the sintered metal load bearing structure (14). The mass selective fluid bandpass filter element consists of quartz glass, of either natural or manmade origin. This method provides removing predetermined gas from the group consisting of: .sup.1H.sub.2, .sup.1H.sup.2H, .sup.2H.sub.2, .sup.1H.sup.3H, .sup.2H.sup.3H, .sup.3H.sub.2, .sup.1H.sub.2O, .sup.1H.sup.2HO, .sup.2H.sub.2O.sub., .sup.1H.sup.3HO, .sup.2H.sup.3HO, .sup.3H.sub.2O, O.sub.2, O.sub.3, .sup.12CO.sub.2, .sup.13CO.sub.2, .sup.14CO.sub.2, .sup.4 CO, N.sub.2, NO, NO.sub.2, NO.sub.x, SiO.sub.2, FeO, Fe.sub.2O.sub.3, SiF.sub.4, HF, NH.sub.3, SO.sub.2, SO.sub.3, H.sub.2SO.sub.4, H.sub.2S, .sup.35Cl.sub.2, .sup.37Cl.sub.2, F.sub.2, Al.sub.2O.sub.3, CaO, MnO, P.sub.2O.sub.5, phenols, volatile organic compounds, and peroxyacyl nitrates.

What is disclosed is a mass selective fluid bandpass filter. This filter provides for selecting gas molecules of a specific mass from a gas sample containing molecules of two or more mass species. This filter provides a means of operation of a selecting a predetermined gas from a group of gases or an atmosphere. The mass selective fluid bandpass filter consists of quartz glass, of either natural or manmade origin. This provides method of removing a predetermined gas from the group consisting of: .sup.1H.sub.2, .sup.1H.sup.2H, .sup.2H.sub.2, .sup.1H.sup.3H, .sup.2H.sup.3H, .sup.3H.sub.2, .sup.1H.sub.2O, .sup.1H.sup.2HO, .sup.2H.sub.2O, .sup.1H.sup.3HO, .sup.2H.sup.3HO, .sup.3H.sub.2O, .sup.3He, .sup.4He, O.sub.2, O.sub.3, .sup.12CO.sub.2, .sup.13CO.sub.2, .sup.14CO.sub.2, CO, N.sub.2, NO, NO.sub.2, NO.sub.x, SiO.sub.2, FeO, Fe.sub.2O.sub.3, SiF.sub.4, HF, NH.sub.3, SO.sub.2, SO.sub.3, H.sub.2SO.sub.4, H.sub.2S, .sup.35Cl.sub.2, .sup.37Cl.sub.2, F.sub.2, Al.sub.2O.sub.3, CaO, MnO, P.sub.2O.sub.5, phenols, volatile organic compounds, and peroxyacyl nitrates.

A mobile mining platform for operation on a lunar surface can excavate and deposit regolith into a mill. The mill can agitate at least a portion of the excavated regolith to release volatile gases from the portion of the excavated regolith, without heat being applied to the portion of the excavated regolith. A refinery can perform molecular separation of the released volatile gases. In some embodiments, pressure in the mill can be increased through introduction of a diluent gas into the mill, to improve the efficiency of pumping the released volatile gases from the mill to the refinery. In some embodiments, volatile liquids stored on the platform and/or generated by the refinery can be used to cool the released volatile gases prior to molecular separation of the released volatile gases. In some embodiments, the mill can separate and collect regolith material of different sizes for different uses.

An object of the present invention is to provide an oxygen isotope concentration method and an oxygen isotope concentration apparatus that can safely and stably supply ozone without increasing the size of the device. The present invention provides an oxygen concentration method including: a photoreaction step of irradiating a first mixed fluid (F1) in which oxygen and a diluent substance (DS) are mixed with a laser, selectively decomposing ozone containing an oxygen isotope, and generating oxygen containing an oxygen isotope, and obtaining a second mixed fluid (F2) in which the oxygen, the ozone, and the diluent substance (DS) are mixed; a liquid storage section introduction step of introducing the second mixed fluid (F2) into a liquid storage section (10) and liquefying it; and a separation step of introducing the second mixed fluid (F2) with hydraulic head obtained by liquefying the second mixed fluid (F2) and storing it in the liquid storage section (10), into a separation column (21), distilling the second mixed fluid (F2) which has liquefied, and separating into a third mixed fluid (F3) in which ozone and the diluent substance (DS) are mixed, and product oxygen (PO) in which oxygen isotope heavy components are concentrated; wherein the liquid storage section (10) can store the liquefied second mixed fluid (F2) without being affected by heat input.