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241.
M. García-Talavera J.L.M. MatarranzR. Salas L. Ramos 《Journal of environmental radioactivity》2011,102(1):1-7
Radioactive and chemical risks coexist in NORM industries although they are usually addressed separately by regulations. The European Union (EU) has developed extensive legislation concerning both matters, which has been diversely reflected in national policies. We consider the case of the Spanish phosphate industry and analyse to which extent regulatory mandates have reduced the historical and ongoing radiological impact on the environment of phosphate facilities. Although no specific radiological constraints on effluent monitoring and release or on waste disposal have yet been imposed on NORM industries in Spain, other environmental regulations have achieved a substantial reduction on the phosphate industry impact. Nevertheless, a more efficient control could be established by eliminating the current conceptual and practical separation of chemical and radioactive risks in NORM industries. We highlight research needs to accomplish so and propose shorter-term measures that require active cooperation among the regulatory bodies involved. 相似文献
242.
信息产业与可持续发展在共同的时代背景下应运而生,相互作用又有机统一.信息产业对可持续发展有显著的正效应,主要表现为:信息产业对经济发展的贡献;信息技术的发展应用,可以减少人物流动,提高资源配置效率;合理利用自然资源,实时监测环境变化;可以通过非物质化降低能耗和物耗,等等.同时,信息产业因其固有的特殊性,又表现出与可持续发展不协调的方面,如信息安全与信息污染、电子产品中有毒元素的应用、电磁辐射及对人体的影响等.文章最后提出,信息产业对社会经济的可持续发展具有重要的推动作用,大力发展信息产业是我国产业结构调整的必然选择,以可持续发展战略指导信息产业健康发展,并以信息产业推动其他行业的可持续发展,提高资源环境利用和管理水平,是可持续发展的必由之路. 相似文献
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248.
Sudha Rani Batchu Venkata R. Panditi Piero R. Gardinali 《Journal of environmental science and health. Part. B》2013,48(3):200-211
The photochemical fate of seven sulfonamides was investigated in matrices representative of natural water bodies under various light sources. Fundamental photolysis parameters such as molar absorption coefficient, quantum yield (QY) and first-order rate constants were determined. The photolysis decay rate was dependent on the protonation state of the molecule, pH of the water sample and dissolved organic matter. Natural organic matter was the most significant factor in the indirect photolysis of sulfonamides. Half-lives were in the range of minutes at 254 nm to days under natural sunlight. Under natural sunlight, all sulfonamides showed higher removal rates in natural waters implying that indirect photolysis is the predominant mechanism. 相似文献
249.
湘西民族文化产业发展对策研究 总被引:1,自引:0,他引:1
民族文化产业是文化产业发展中一个重要组成部分,是充分利用当地富有特色的民族文化资源,促进本地区经济社会文化协调发展的一个重要途径。以湘西自治州民族文化产业为研究对象,通过实地调查,分析了湘西民族文化产业发展中存在的问题,提出了湘西民族文化产业的发展对策。 相似文献
250.
Myron A. Peck Paul E. Fell Elizabeth A. Allen Jennifer A. Gieg Carl R. Guthke Michael D. Newkirk 《Environmental management》1994,18(2):283-293
Macroinvertebrates were examined on an impounded valley marsh in Stonington, Connecticut, that has changed from aTypha-dominated system to one with typical salt-marsh vegetation during 13 years following the reintroduction of tidal exchange.
Animal populations on this restored impounded marsh were evaluated by comparing them with populations on a nearby unimpounded
valley marsh of roughly the same size. Populations of the high marsh snail,Melampus bidentatus Say, were quantitatively sampled along transects that extended from the water-marsh edge to the upland; those of the ribbed
mussel,Geukensia demissa Dillwyn, were sampled in low marsh areas on transects along the banks of creeks and mosquito ditches. The occurrence of other
marsh invertebrates also was documented, but their abundance was not measured. The mean density ofMelampus was 332±39.6 SE/m2 on the restored impounded marsh and 712±56.0 SE/m2 on the unimpounded marsh. However, since snails were larger on the restored impounded marsh, the difference in snail biomass
was less pronounced than the difference in snail density. MeanMelampus biomass was 4.96±0.52 SE g dry wt/m2 on the restored impounded marsh and 6.96±0.52 SE g dry wt/m2 on the unimpounded marsh. On the two marshes, snail density and biomass varied in relation to plant cover and other factors.
The density and biomass ofGeukensia at the edge of the marsh were comparable on the restored impounded and unimpounded marshes. Mean mussel densities ranged
from 80 to 240/m2 and mean mussel biomass varied from 24.8–64.8 g dry wt/m2 in different low marsh areas. In contrast, below the impoundment dike, meanGeukensia density was 1100±96.4 SE/m2 and meanGeukensia biomass was 303.6±33.28 SE g dry wt/m2. A consideration of all available evidence leads to the conclusion that the impounded marsh is in an advanced phase of restoration. 相似文献