排序方式: 共有73条查询结果,搜索用时 0 毫秒
71.
Schoffer Jorge Tomás Antilén Mónica Neaman Alexander Díaz María Francisca de la Fuente Luz María Urdiales Cristian Ginocchio Rosanna 《Environmental science and pollution research international》2021,28(43):60913-60922
Environmental Science and Pollution Research - This study assessed the capacity of leaf litters to adsorb copper ions applied as a copper-based pesticide. Leaf litters of two fruit tree species... 相似文献
72.
Philip D. Gardner Hanna J. Cortner Keith F. Widaman Kathryn J. Stenberg 《Environmental management》1985,9(4):303-311
The formulation and implementation of new fire policies in the national forests depend upon public acceptance. A national survey of organized groups of forest users indicates that, contrary to the concern of many forest managers, considerable support exists for flexible fire suppression policies. Forest users are also willing to accept the risk associated with the manager's use of prescribed fire. However, important intergroup differences do exist. Such variation is discussed in relation to a number of socioeconomic variables, general fire knowledge, specific knowledge about the effects of low-intensity fires, and risk preference levels. 相似文献
73.
Hudson Wallace Pereira Carvalho Ana P. L. Batista Peter Hammer Gustavo H. P. Luz Teodorico C. Ramalho 《Environmental Chemistry Letters》2010,8(4):343-348
Polysaccharide natural seed coat from the tree Magonia pubescens, in the form of hydrogel was used to remove metals in aqueous solution. Swelling tests indicate that seed coat presents hydrogel
behavior, with maximum water absorption of 292 g water/g. Adsorption experiments performed using Na+, Mg2+, K+, Ca2+, Cr3+, Fe3+ and Zn2+ demonstrated that the polysaccharide structure has a high capacity to extract these ions from the aqueous solution. Scanning
electron microscopy revealed significant morphological changes of the material before and after water contact. Differential
scanning calorimetry measurements indicate a signal shift of the water evaporation temperature in the material with adsorbed
zinc. X-ray photoelectron spectroscopy analysis combined with theoretical studies by the density functional theory and on
Hartree–Fock (HF) level evidence that the metallic ions were adsorbed through coordination with hydroxyl groups of polysaccharide.
In the case of Zn2+ the lowest HF energy was observed for the tetracoordination mode, where Zn2+ is coordinated by two hydroxyl groups and two water molecules. 相似文献