NGHIÊN CỨU SỬ DỤNG CO2 TỪ KHÍ THẢI ĐỐT THAN ĐỂ NUÔI VI TẢO SPIRULINA PLATENSIS

UTILIZATION OF CO2 CAPTURED FROM THE COAL-FIRED FLUE GAS FOR GROWING  SPIRULINA PLATENSIS SP4 The paper presents the results concerning the utilization of CO2 captured from the coal-fired flue gas for growing the  Spirulina platensis SP4 in laboratory condition. Several research results on the conversion of CO32- and HCO3- in algal suspension and CO2 intake efficiency by the alga were presented. The growth and  biomass quality of  Spirulina platensis SP4 using CO2 from fired-coal flue gas were equivalent to that of the alga grown in the pure CO2 experimental lot

KIẾN TẠO HIỆN ĐẠI VÀ CÁC TAI BIẾN ĐỊA CHẤT LIÊN QUAN Ở VÙNG BIỂN VIỆT NAM VÀ LÂN CẬN

SUMMARY Neotectonics and geological hazards in Vietnam Sea and surroundings This paper presents velocities of present-day tectonic movements in Vietnam and surroundings determined from GPS campaigns from 2007 to 2010. Absolute displacements and velocities of GPS stations in the IGS05 frame were determined. The result indicates that Lang station (LANG) moves eastward with slip rate of ~39mm/yr, southward with slip rate of ~11 mm/yr. The rate of Bach Long Vi (BLV1) is ~30mm/yr for the eastern component and ~11mm/yr for southern component. Song Tu Tay (STT1) moves eastwards with the rate of ~24mm/yr and southwards of 8mm/yr. Con Dao (CDA1) moves to the east with the rate of ~22mm/yr and to the south with the rate of ~6mm/yr. Dong Hoi (DOHO) move to the east with the rate of ~27mm/yr and to the south with the rate of ~8mm/yr. Hue (HUES) moves to the east with the rate of ~30 mm/yr and to the south with the rate of ~12mm/yr. HOCM move to the east with the rate of ~22mm/yr and to the south with the rate of ~10mm/yr. Calculate errors for both direction vary in 0.6 - 1mm/y. Based on seismic profiles, focal mechanisms and regional stress field, several fault segments in Pliocene - Quaternary sediments in East Vietnam Sea has been identified in Red River, Cuu Long and Nam Con Son basins with maximum of 15 km in length. Actual stress regimes in Vietnam and south Hainan basins being transitional demonstrate no source of large tsunami closing to Vietnam shelf. The subduction zone located at north Borneo is not active at present. Only Manila subduction zone is the source for large tsunami in East Vietnam Sea. Based on gravimetric field, topography, distribution of focal mechanisms in various depths and the rate of actual tectonic movement, 5 fault zones of the Manila subduction zone have been divided. The fault zones F3 and F4 can produce respectively maximum earthquake of 8.1 and 8.4. Modeling of displacement of fault zone F4 from the depth 15 to 20 km, 2m high of tsunami at Quang Ngai can be occurred. The depth of tsunami flood can be up to 4-5 m at some places in Quang Ngai and Da Nang

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495 tr. ; 21 cm