Key Laboratory of Nuclear Techniques in Geosciences

Chengdu, China

Key Laboratory of Nuclear Techniques in Geosciences

Chengdu, China
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Wu Y.-S.,Chengdu University of Technology | Shi Z.-M.,Chengdu University of Technology | Shi Z.-M.,Key Laboratory of Nuclear Techniques in Geosciences | Xu J.-Y.,Chengdu University of Technology | Xu J.-Y.,Key Laboratory of Nuclear Techniques in Geosciences
Wutan Huatan Jisuan Jishu | Year: 2012

EDS was used for spot measurement of natural radionuclide in Rangtang of Aba. The authors calculate internal / external exposure index, y-ray exposure rate and γ-ray external exposure, and appraise the natural radioactive environment of the region. The results showed that γ-ray exposure rate was higher than the average of the country (100.07Gy/h)and the world (80Gy/h) in the region. But internal / external exposure index, γ-ray exposure rate and γ-ray external exposure were in the range of the country control limits. Enrichment of surface water and transport of radioactive elements in the role of the soil pool area have an impact on the level of radioactivity. And the fault zone near the relatively high level of radioactivity. Rangtang natural radioactivity level of the region is still in a safe range, suitable for human living and life.


Wang X.Y.,Chengdu University of Technology | Wang X.Y.,Key laboratory of Nuclear Techniques in Geosciences | Ni S.J.,Chengdu University of Technology | Ni S.J.,Key laboratory of Nuclear Techniques in Geosciences | And 2 more authors.
Advanced Materials Research | Year: 2013

To explore the effect of logfO2(g), pH, uranium concentration, phosphate concentration and NaCl concentration on the predominance diagrams of dissolved uranium species and formation of solid phases containing uranium in the U-PO4 3--NaCl-H2O system at 25°C and PCO2 =10-3.5 MPa, the thermodynamic model of this system was constructed. Based on the results of calculation, the logfO2(g)-pH diagrams were drawn. It can be found that: 1) the formation of uraninite needed enough reductive condition (about logfO2(g) < -50), while the formation of Na-Autunite needed the strict pH range(5


Peng X.,Chengdu University of Technology | Peng X.,Key Laboratory of Nuclear Techniques in Geosciences | Qing C.,Chengdu University of Technology | Xu B.,Chengdu University of Technology | And 9 more authors.
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2010

The heavy metal pollution made by industrial coal in city is receiving more and more attentions, but the time effect researches on fire coal capacity and heavy metal pollution after enterprise' relocation out of urban area are comparatively less. This paper studied the east Industrial zone, doing quantitative analysis on 5 types of heavy metal elements of coal samples, cinder, coal ash, topsoil, deep soil by x fluorescence analysis in 2004, 2006, 2009, discussing the time effect of urban air dust and soil heavy metal pollution during the process of reduced fire coal. The results show that: (1) urban industrial fire coal had spatial effect to heavy metal pollution, with a usual order such as floating dust > top soil> deep soil. (2) The reduction of fire coal would decline the contents of heavy metal in floating dust soon, but the soil especially the deep soil was still polluted by fire coal during a lasting time. (3) The shutting down of thermal power plant would make a positive effect on the recovery of air quality, however demolishing would cause more serious pollution without a series of environmental protection measures in the short period of time. ©2010 IEEE.


Peng X.,Chengdu University of Technology | Peng X.,Key Laboratory of Nuclear Techniques in Geosciences | Qing C.,Chengdu University of Technology | Ye Y.,Chengdu University of Technology | And 9 more authors.
2010 4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010 | Year: 2010

The heavy metal pollution on atmospheric dust made by fire coal of city power plant is receiving more and more attentions, but spatial and temporal effect researches on fire coal amount and heavy metal pollution of atmospheric dust after enterprise' relocation out of urban area are comparatively less. This paper studied three thermal power plants in east city and Beihu Park on the outskirts, doing quantitative analysis on S types of heavy metal elements of atmospheric dust by x fluorescence analysis in 2004, 2006, 2009, and discussed spatial and temporal effect of atmospheric dust heavy metal pollution during the reduction of fire coal. The results indicated that: (1) Urban industrial fire coal had spatial effect on urban heavy metal pollution, the fire coal of thermal power plants would make more near-source pollution but less on the outskirts. Adjusting energy resource structure would make it positive for the immediate decrease of heavy metal in floating dust. (2) Urban industrial fire coal had temporal effect on atmospheric dust heavy metal pollution, no sooner than adopting fire coal Environmental Technology would reduce the contents of heavy metal in floating dust, and however, Zn often enriched in floating dust and made cumulative time effect. (3) The shutting down of thermal power plants could made a positive effect on the recovery of air quality, yet the demolition may cause more serious pollution so that a series of environmental protection measures should be considered to prevent re-polluting. © 2010 IEEE.


Wang X.,Chengdu University of Technology | Wang X.,Key Laboratory of Nuclear Techniques in Geosciences | Ni S.,Chengdu University of Technology | Ni S.,Key Laboratory of Nuclear Techniques in Geosciences | And 2 more authors.
Chemie der Erde - Geochemistry | Year: 2014

To clarify the mechanisms of uranium distribution in river sediment and its speciation in river water near a phosphate mining region, the sediment and river water in the Mianyuan River in China were investigated. Using linear correlation analysis, it was determined that uranium distribution in upstream sediment is mainly controlled by the adsorption of organic compounds (RTOC-U2=0.848), whereas distribution is controlled by physical deposition of albite (RNa-U2=0.773) in downstream sediment. In addition, it was determined that Se and As had strong and positive linear correlations with uranium in sediment, regardless of whether it was upstream or downstream sediment. This type of relationship was also found in phosphate ores, which suggests that the ore is the common source of U, Se and As in the sediment. The results of speciation-solubility modelling suggest that no precipitation of uranium minerals occurred in river water and the dominant uranium species in river water included: UO2(HPO4)2 2-, Ca2UO2(CO3)3 and UO2(CO3)3 4-. In addition, our modelling indicated the relative species distribution was mainly affected by the pH and the total phosphate concentration. © 2014 Elsevier GmbH.

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