CHEN Li; PAN Bai-Liang; WANG Ya-Juan; MAO Bang-Ning
A cataphoretic input of calcium vapour into the active volume of pulsed He-Ca+ laser is designed and made. The recombination laser at 373.3nm and the R-M transition laser at 854.6nm are achieved experimentally with modified Blumlein circuit by high-frequency longitudinal pulsed discharge. The dependences of work parameters such as the pulse frequency, the power supply voltage and the helium pressure on laser output characteristics at 373.3 nm line are measured and discussed. The maximum laser output power of 136mW and the specific power of 5.9 m W/cm3 are obtained, respectively.
赵凯利; 王成; 孙振华
The present paper refers about the use of some advanced oxidation processes for the treatment of a particular industrial wastewater polluted by organic acids and solvents. Such waste is generated during the electrodeposition of paint in cathodic technological systems (cataphoresis). The AOPs studied were the following: H2O2-UV, O3 in strongly alkaline media and Fe(met)-H2O2. The latter which represents a derivation of the Fenton process gave the best results in terms of reaction times, costs in management and reduction rate of organic matter. Its efficiency was also confirmed by some laboratory tests made on synthetic samples. The reactors used to perform the experiments with ozone and H2O2-UV were especially created. The degradation of the organic compounds was quantified by monitoring the COD parameter and in some cases by detecting the concentration of each individual pollutant
The present article outlines investigations and experience made by the author in carrying out a variety of studies on isotopes since 1939. First, he was interested in transuranic elements and his studies on artificial radioactive isotopes covered the detection of plutonium at Nagasaki, chemical separation of plutomium from atmosphere at Tokyo, spectral analysis of alpha rays from plutomium, application of 113mIn to emission spectral analysis as a tracer, chemical enrichment of 76As hot atom, and non-destructive analysis of the chemical state of 119Sn produced through EC disintegration in solid material. His studies on natural radioactivity include measurement of the radium content in rock and mineral samples collected in the Korean Peninsula, investigation on the formation process of minerals found around hot springs and determination of the age of rock and mineral samples. He started investigations on isotope enrichment around 1965. Studies in this field cover the application of cataphoretic processes to separation of 23Na and 22Na, enrichment of 7Li and other alkali metals, enrichment of 6Li by isotope exchange, derivation of an empirical equation (Saito-Kanno Equation) for mass effect in couter-current cataphoresis of molten halides, etc. (Nogami, K.)