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181.
182.
为增强我国应急预案的实用性和有效性,改善现有的应急预案准则性强,可操作性弱的情况,笔者运用比较分析的方法,评述了3个版本的美国应急通用任务列表,从作用、结构和内容等方面比较各版本的通用任务表间的不同以及各自优缺点,并从理论和现实2个方面分析通用任务列表版本变迁的原因,为我国应急预案和应急准备的建立提供可借鉴的经验和参考,并对其未来发展提出建议。 相似文献
183.
In this study, the sorption of U(VI) from aqueous solution on hematite was studied as a function of various water quality parameters such as contact time, pH, ionic strength, soil humic acid (HA) or fulvic acid (FA), solid content and temperature by using a batch technique. The results demonstrated that the sorption of U(VI) was strongly dependent on ionic strength at pH < 6.0, and outer-sphere surface complexation may be the main sorption mechanism. The sorption was independent of ionic strength at pH > 6.0 and the sorption was mainly dominated by inner-sphere surface complexation. The presence of HA/FA increases U(VI) sorption at low pH, whereas decreases U(VI) sorption at high pH. The thermodynamic parameters (ΔH0, ΔS0, and ΔG0) were calculated from the temperature dependent sorption isotherms, and the results suggested that U(VI) sorption was a spontaneous and endothermic process. The results might be important for the application of hematite in U(VI) pollution management. 相似文献
184.
Jha SK Gothankar S Iongwai PS Kharbuli B War SA Puranik VD 《Journal of environmental radioactivity》2012,103(1):1-6
The concentration of naturally occurring radionuclides 232Th, 238U was determined using Instrumental Neutron Activation Analysis (INAA) in different food groups namely cereals, vegetables, leafy vegetables, roots and tubers cultivated and consumed by tribal population residing around the proposed uranium mine. The study area is a part of rural area K. P. Mawthabah (Domiasiat) in the west Khasi Hills District of Meghalaya, India located in the tropical region of high rainfall that remains steeped in tribal tradition without much outside influence. Agriculture by Jhum (slash and burn) cultivation and animal husbandry are the main occupation of the tribal populations. A total of 89 samples from locally grown food products were analyzed. The concentration of 238U and 232Th in the soil of the study area was found to vary 1.6-15.5 and 2.0-5.0 times respectively to the average mean value observed in India. The estimated daily dietary intake of 238U and 232Th were 2.0 μg d−1 (25 mBq d−1) and 3.4 μg d−1 (14 mBq d−1) is comparable with reported range 0.5-5.0 μg d−1 and 0.15-3.5 μg d−1 respectively for the Asian population. 相似文献