Abstract: The present embodiment relates to a method for recovering a boron adsorbent, including: preparing water having an electric resistivity of 0.01 M?·cm or more and kept at a temperature within a temperature range; and contacting the water with the boron adsorbent to release boron adsorbed at the boron adsorbent.

Abstract: A carbon dioxide absorbent includes lithium silicate containing lithium orthosilicate and lithium metasilicate, the lithium metasilicate being contained in an amount of 5% by weight or more to 40% by weight or less with respect to the total amount of lithium orthosilicate and lithium metasilicate, where the lithium metasilicate produced by reaction of the lithium orthosilicate and carbon dioxide is excluded.

Abstract: A carbon dioxide gas absorbent includes a porous body containing a lithium complex oxide. The porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 ?m and second pores with a diameter larger than 100 ?m and 500 ?m or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 ?m occupy 0 to 10% and fourth pores with a diameter larger than 500 ?m occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%.

Abstract: A carbon dioxide absorbent includes lithium silicate containing lithium orthosilicate and lithium metasilicate, the lithium metasilicate being contained in an amount of 5% by weight or more to 40% by weight or less with respect to the total amount of lithium orthosilicate and lithium metasilicate, where the lithium metasilicate produced by reaction of the lithium orthosilicate and carbon dioxide is excluded.

Abstract: The carbon dioxide absorbent contains a lithium-containing oxide, an alkali halide, has a high carbon dioxide absorption capability, and sufficiently maintains the carbon dioxide absorption capability even in repeated used for absorption and desorption of carbon dioxide.

Abstract: A detecting device for a hydrogen halide gas, includes an insulating support, a detecting member supported on the insulating support and containing an absorbent which reacts with the hydrogen halide gas to produce water, and a pair of electrodes attached respectively to both ends of the detecting member and configured to measure a change in an electric resistance value or an electrostatic capacitance of the detecting member, caused by the production of water due to a reaction between the hydrogen halide gas and the absorbent in the detecting member.

Abstract: A carbon dioxide absorbent of the invention comprises (a) a lithium silicate and (b) an absorption promoter containing potassium carbonate and sodium carbonate at a mole ratio of (sodium carbonate)/(potassium carbonate) in a range from 0.125 to 0.4, and the absorption promoter (b) is contained in an amount from 0.5 to 4.9% by mole based on the total amount of the lithium silicate (a) and the absorption promoter (b).

Abstract: A carbon dioxide absorbent includes a porous body containing a large number of lithium composite oxide particles having an average particle diameter of 2 to 7 ?m, the porous body having a porosity of 30 to 80% and also having pores with a diameter of 10 to 25 ?m occupying at least 15% by volume of the entire pores.

Abstract: A carbon dioxide gas absorbent includes a porous body containing a lithium complex oxide. The porous body includes pores having a pore diameter distribution such that main pores which consist of first pores with a diameter of 10 to 100 ?m and second pores with a diameter larger than 100 ?m and 500 ?m or smaller occupy 80 to 100%, third pores with a diameter smaller than 10 ?m occupy 0 to 10% and fourth pores with a diameter larger than 500 ?m occupy 0 to 10%, the main pores have a pore diameter distribution such that the first pores occupy 15 to 85% and second pores occupy 15 to 85%.

Abstract: A catalyst-containing reaction accelerator used in a steam reforming reaction of hydrocarbon comprises a solid catalyst to accelerate the steam reforming reaction, and a composite absorbent which is mixed with the solid catalyst. The composite absorbent has a main absorbent which contains a lithium-containing oxide for absorbing and desorbing carbon dioxide by-produced by the steam reforming reaction, and a molten carbonate holding material which does not react with the main absorbent at a temperature at which the main absorbent absorbs and desorbs carbon dioxide.

Abstract: The present invention provides a method of proliferating a microorganism capable of degrading a hard-to-degrade organic compound, comprising proliferating at least one microorganism capable of degrading a hard-to-degrade organic compound selected from the group consisting of Janibacter genus, Pseudomonas genus, Rhodococcus genus, Desulfomonile genus, Alcaligenes genus, Bacillus genus, Streptococcus genus, Acinetobacter genus, Achromobacter genus, Paracoccus genus, Rhodobacter genus, Rhodobacterium genus, Methylosinus genus, Mycobacterium genus, Nitrosomonas genus, Corynebacterium genus, and Methanotrophs, in a culture medium containing both a substance capable of inducing the degradation capability of the microorganism and Fe ions, under inorganic conditions.