排序方式: 共有12条查询结果,搜索用时 15 毫秒
11.
C.?Verwilghen R.?GuiletEmail author E.?Deydier M.?J.?Menu Y.?Dartiguenave 《Environmental Chemistry Letters》2004,2(1):15-19
We compared mercaptopropyl fonctionalized silica, SiSH, with two aminoethanethiol modified silica gels, SiNS and SiNMeS, for their ability to remove Cd2+ and Pb2+ from aqueous solutions. Adsorption was performed using a batchwise process. The maximum adsorption capacities were obtained for lead and cadmium. The adsorption isotherms followed the Langmuir model. The calculated parameters indicated a similar removal capacity of Si[2-[3-(triethoxysilyl)propylamino]ethanethiol] and Si-[1-methyl-2-[3-(triethoxysilyl) propylamino]ethanethiol]. This study underscores the different behaviour of the aminoethanethiol modified silica gels compared to the mercaptopropyl modified silica for lead and cadmium uptake. 相似文献
12.
Anne-Sophie Bonnet-Lebrun Thomas Larsen Thorkell Lindberg Thrarinsson Yann Kolbeinsson Morten Frederiksen Tim I. Morley Derren Fox Aude Boutet Fabrice le Bouard Tanguy Deville Erpur Snr Hansen Thomas Hansen Patrick Roberts Norman Ratcliffe 《Ambio》2022,51(2):345
Climate change alters species distributions by shifting their fundamental niche in space through time. Such effects may be exacerbated by increased inter-specific competition if climate alters species dominance where competitor ranges overlap. This study used census data, telemetry and stable isotopes to examine the population and foraging ecology of a pair of Arctic and temperate congeners across an extensive zone of sympatry in Iceland, where sea temperatures varied substantially. The abundance of Arctic Brünnich’s guillemot Uria lomvia declined with sea temperature. Accessibility of refugia in cold water currents or fjords helped support higher numbers and reduce rates of population decline. Competition with temperate Common guillemots Uria aalge did not affect abundance, but similarities in foraging ecology were sufficient to cause competition when resources are limiting. Continued warming is likely to lead to further declines of Brünnich’s guillemot, with implications for conservation status and ecosystem services.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-021-01650-7. 相似文献