Idec Corporation

Mitsubishi Chemical Corporation

Hideaki Kobayashi

Masakazu Kashiwa

Yasuyuki Fujii

Yukio Onohara

Tatsuhiko Inagaki

Masahiro Ootsubo

Initial liquid containing fine bubbles is produced by mixing water and air (step S). Fine bubbles have diameters of less than 1 &#x3bc;m. The density of bubbles in the initial liquid is measured (step S), and when the measured density is less than a target density (step S), the initial liquid is heated and reduced in pressure so that the liquid is vaporized (step S). As a volume of the liquid decreases, the density of fine bubbles increases, and high-density fine bubble-containing liquid is easily obtained. Alternatively, by increasing the density of fine bubbles in the initial liquid with using a filter that does not pass all fine bubbles, high-density fine bubble-containing liquid is easily acquired (step S). When the density of bubbles in the initial liquid is greater than the target density, the initial liquid is diluted (step S).

High-density fine bubble-containing liquid producing method and high-density fine bubble-containing liquid producing apparatus

A metal adsorption acrylic fiber wherein the strontium adsorption rate is 85% or more when the strontium adsorption rate is measured using the following measurement method. A strontium adsorption rate measurement method (strontium 0.1 ppm measurement method) involves immersing a metal adsorption acrylic fiber into an immersion fluid, collecting the immersion fluid as a testing solution 24 hours after beginning the immersion, analyzing the quantity of strontium in the testing solution, obtaining the concentration (C) (ppm) of strontium in the testing solution, creating a contrast solution, analyzing the quantity of strontium in the contrast solution as in the case with the testing solution, obtaining the concentration (C) (ppm) of strontium in the contrast solution, and calculating the strontium adsorption rate of the metal adsorption acrylic fiber by using the following equation: strontium adsorption rate (%)={(C&#x2212;C)/C}&#xd7;100.

Metal adsorption acrylic fiber, non-woven fabric, sheet-like product, and uses thereof as metal adsorbent

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Osaka, Japan

Hideaki Kobayashi