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排序方式: 共有208条查询结果,搜索用时 234 毫秒
181.
Yongxin Zhang Yanping Yang Yue Gong Ying Wang Xuecheng Wu Zhiying Zhou Weiguo Weng 《环境科学学报(英文版)》2023,123(1):212-221
Vessel emissions have contributed a great deal to air quality deterioration in China. Hence,the Chinese government has promulgated a series of stringent emission regulations. It is in this context that vessel emission control technology research is in full swing. In particular,during the 13th Five-Year Plan, the air pollution control technology of vessels has greatly improved. Vessel emission control has followed two main governance routes: source emission reduction and aftertreatment technology... 相似文献
182.
Xue Xiaoxiao Weng Yujing Yang Shicheng Meng Shihang Zhang Zhengting Yi Guiyun Zhang Yulong 《Environmental science and pollution research international》2021,28(13):15883-15889
Environmental Science and Pollution Research - Using copper nitrate trihydrate as the copper source, TiO2@Cu-MOF nanocomposites were prepared by a one-step crystallization method, and the effect of... 相似文献
183.
Verma Sarika Mili Medha Dhangar Manish Jagatheesan Krishnasamy Paul Sriparna Bajpai Harsh Vedanti Nimisha Mallik Jyotirmoy Khan Mohammed Akram Bhargaw Hari Narayan Hashmi Sayed Azhar Rasheed Srivastava Avanish Kumar 《Environmental science and pollution research international》2021,28(46):64929-64950
Environmental Science and Pollution Research - The materials used in electrical and electronic applications have great importance and broader applications, but they have severe electromagnetic... 相似文献
184.
Nocturnal chemistry can play an important role in determining the initial morning conditions for daytime chemistry in urban areas. However, the impact on daytime O3 levels is difficult to assess as the suppression of vertical trace gas transport leads to highly altitude dependent nocturnal chemistry, in particular with respect to the removal and conversion of nitrogen oxides (NOx) and volatile organic compounds (VOC). One-dimensional (1-D) chemical transport model calculations for different nighttime vertical stabilities and different ozone formation regimes (i.e. NOx- vs. VOC-sensitive) were performed assuming a 1000 m high daytime boundary layer and a growing nocturnal boundary layer reaching 200 m height at the end of the night. Exclusion of NO3 chemistry from the model leads to daytime O3 concentration changes from ?4% to +16% for different O3 sensitivities. In all cases strong nocturnal vertical concentration profiles of NOx, O3, NO3 and N2O5 and a dependence of these profiles on vertical stability were found at night. The nocturnal NOx loss averaged over the lowest 1000 m changes by 9–24% for different vertical stabilities and ozone sensitivities. The impact of nocturnal vertical stability leads to 7–12% difference in O3 concentration in the morning and ~0–2.5% in the afternoon. 相似文献
185.
利用化工污染物能抑制荧光素酶催化发光反应这一特性,对水质中6种化工化合物分别进行毒性测试,建立一种快速检测水质中化工污染物毒性的生物学方法。实验结果表明,对苯二酚、4-氨基酚、苯胺、氯仿、盐酸邻联甲苯胺和硫柳汞的EC50值分别为:5.563、10.225、20.236、38.432、8.827和0.6 mg/L,6种污染物毒性大小依次为:硫柳汞>对苯二酚>盐酸邻联甲苯胺>4-氨基酚>苯胺>氯仿,相关系数>0.95。该方法为进一步研究基于荧光素酶反应体系检测水质中化工污染物综合毒性的生物传感器方法奠定基础。 相似文献
186.
Multivariate analysis of trace element concentrations in atmospheric deposition in the Yangtze River Delta,East China 总被引:1,自引:0,他引:1
187.
188.
通过深入研究常见化学品在不同物料输送泵输送过程中的污染物排放规律,模拟实际生产过程中物料输送的形式,设计并搭建了系数测定试验装置,探索并选择甲苯、二甲苯、甲醇和盐酸在该试验装置中的取样、计量和监测方法。经过长期的现场实测,形成了4种常见化学品在典型的5种类型的泵输送过程中的污染物排放系数。根据试验结果,计算总结得知,在三类釜前泵输送过程中,污染物排放系数从小到大排序为二甲苯、盐酸、甲苯、甲醇;在两类真空泵输送过程中,污染物排放系数从小到大排序为二甲苯、甲苯、盐酸、甲醇。 相似文献
189.
190.
Kevin C. Weng Andre M. Boustany Peter Pyle Scot D. Anderson Adam Brown Barbara A. Block 《Marine Biology》2007,152(4):877-894
Satellite telemetry studies of 20 adult and sub-adult white sharks (360–530 cm estimated total length (TL)) in the eastern
North Pacific during 1999–2005 revealed long distance seasonal migrations from the coast of California to an offshore focal
area 2,500 km west of the Baja Peninsula, as well as the Hawaii Islands. Three tags were recovered allowing detailed behavioral
analyses, including one shark’s migration cycle from the coast to the offshore focal area and back. While near pinniped rookeries
in autumn and winter, sharks avoided the surface and used water to 50 m depth, consistent with a silhouette-based hunting
strategy. Offshore migrations were initiated during November–March and followed periods of decreasing pinniped abundance.
Migrations were highly directed, taking 23 ± 5 days to reach the offshore focal area along similar paths among sharks and
years, defining a migration corridor. Sharks exhibited a broad depth distribution (0–644 m) in the offshore focal area, and
remained there for up to 167 days during spring and summer, though primary productivity and fishery data suggest that forage
resources are scarcer there than in other regions of the eastern North Pacific. Archival data from one shark revealed intensive
oscillatory movements while in the offshore focal area, a behavior that may be related to foraging or mating. Sharks traveling
to Hawaii remained near the islands up to 122 days, potentially feeding on pelagic fishes and marine mammals that concentrate
around the islands.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献