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Volume 33 (1979 - 198･･･
- Issue 6 Pages 303-
- Issue 5 Pages 251-
- Issue 4 Pages 201-
- Issue 3 Pages 143-
- Issue 2 Pages 84-
- Issue 1 Pages 3-
Volume 33, Issue 2
Displaying 1-8 of 8 articles from this issue
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[in Japanese], [in Japanese]1979 Volume 33 Issue 2 Pages 84-92
Published: 1979
Released on J-STAGE: February 19, 2013
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[in Japanese]1979 Volume 33 Issue 2 Pages 93-101
Published: 1979
Released on J-STAGE: February 19, 2013
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Studies on the Extraction of Uranium from Sea Water by the Composite Adsorbent (Part 11)Yoshitaka MIYAI, Takao KITAMURA, Shunsaku KATOH, Hidetoshi MIYAZAKI1979 Volume 33 Issue 2 Pages 102-108
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSThe powdery titanium-activated carbon composite adsorbent was granulated, and the strengthand uranium adsorptivity of the granulated adsorbent were studied in relation to its granulatingcondition. By use of polyvinylalcohol (PVA) with degree of polymerization above 2,000 as binder, the granular adsorbent with as much the same strength as commercial granular activated carbonwas obtained. Addition of PVA did not affect the amount of adsorbed uranium in equilibrium, but decreased the adsorption rate. Effect of granule size between 2-5 mm on the uranium adsorptionrate was that the uranium adsorption rate changed proportionally to surface area of assumed sphere. As a test for practical use, 5 times repetitions of adsorption and desorption were carried out onthe same granular adsorbent. During this repetition the adsorbent containing formalized PVA revealed smaller weight loss than non-treated adsorbent. The amount of adsorbed uranium deecreased with increasing repetition times, and reason of this was discussed.View full abstractDownload PDF (4806K) -
Masahito SATO, Shigeki TOYAMA1979 Volume 33 Issue 2 Pages 109-115
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSIn partial load operations of a multi-stage flash evaporator (MSF) to desalt sea water, it hasbeen reported by the authors that ineffective stages appeared in the lower temperature section of theheat recovery, so that gained output ratios might be very lower than the theoretical values calculatedby the equation that could express well the full load operation.
In order to decrease number of these ineffective stages and to restrain appearance of such stages, the MSF with the reflux flow line is proposed and is simulated to obtain the informations of theeffectiveness of the reflux.
Consequently, the following characteristics of the MSF with the reflux flow line are obtained inpartial load operations. The ineffective stages decrease gradually and disappear finally when thereflux was introduced in the heat recovery section. Then, the gained output ratio recovers nearlyto the value calculated by the theoretical equation. Also, the brine levels that rise higher in partialload operations of a common MSF, drop down step by step and are kept nearly in the level designedwhen the maximum brine temperature or the recycle brine flow rate is varied slightly. Therefore, the MSF with the reflux line has better operating characteristics than the MSF without the reflux.View full abstractDownload PDF (5115K) -
Studies on the Automatic Analysis of Salt Manufacturing Samples (Part 2)Takahiro KANOU, Shizuo SUGITA1979 Volume 33 Issue 2 Pages 116-119
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSIn order to determine automatically potassium ion and sodium ion of samples such as sea water, brine, mother liquid, bittern and common grade salt by using Technicon's Auto-Analyzer, a flowdiagram of flame photometer was prepared and examined.
The results were as follows: The sample solution was mixed with LiNO3 solution as rithiuminternal standard substance. And then, it was mixed into the flame photometer and the potassiumion and sodium ion were measured.
In this method the calibration curve was linear to the concentration of potassium ion and sodiumion up to 100mg/liter respectively. The accuracy of this method was comparable to the ordinarymethod with the coefficient of variation under 0.6%. The speed of analysis was continuously 40-70 samples per hour excluding preparation and dilution of sample.View full abstractDownload PDF (2294K) -
Yoshifumi AKAMA, Toshio NAKAI, Fumikazu KAWAMURA1979 Volume 33 Issue 2 Pages 120-122
Published: 1979
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSA method is described for the determination of copper in sea water by solvent extraction of itscomplex with 4-benzoy1-3-methyl-1-phenyl-5-pyrazolone (BMPP) into MIBK and subsequent analysisby atomic absorption spectrophotometry. To find the optimum conditions on the extraction of copperby BMPP-MIBK system, we examined the effects of pH, amount of BMPP and shaking time, respectively. The effects of coexisting diverse ions were also examined.
The recommended experimental procedure is as follows: 200ml aliquot of sea water containing 2 ml of concentrated hydrochloric acid, is boiled and then filtered using 1.0 micron membranefilter. The resulted solution is placed in a separatory funnel and 10 ml of diammonium hydrogencitrate (10 w/v%) is added. After adjusting to pH 7 with ammonia, the extraction is carriedout with 10 ml of 0.2 w/v% solution of BMPP in MIBK for 5 minutes. In order to avoid theinterference of the diverse ions in sea water, standard addition method is preferred in atomicabsorption spectrophotometry.
This method has been succeessfully applied to the determination of trace copper in sea water.View full abstractDownload PDF (212K) -
Masami KAHO, Takahiro KANOU1979 Volume 33 Issue 2 Pages 123-128
Published: 1979
Released on J-STAGE: February 19, 2013
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Noboru OGATA1979 Volume 33 Issue 2 Pages 129-132
Published: 1979
Released on J-STAGE: February 19, 2013
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