排序方式: 共有4条查询结果,搜索用时 234 毫秒
1
1.
2.
Knook Jorie Dynes Robyn Pinxterhuis Ina de Klein Cecile A. M. Eory Vera Brander Matthew Moran Dominic 《Environmental management》2020,65(2):243-256
Environmental Management - Although the link between agriculture and diffuse water pollution has been understood for decades, there is still a need to implement effective measures to address this... 相似文献
3.
Russell R. Dynes Dennis Wenger 《Journal of the American Water Resources Association》1971,7(4):644-651
ABSTRACT The study explores the perception of community problems, including flooding and pollution, among leaders in four different communities, ranging in size from 10,000 to 20,000. Water-related problems were considered in the context of other community problems which were defined by these leaders. Among these leaders, water-related problems were characterized by low salience and by low consensus. In seeking solutions, these leaders see water problems as being less likely to be solved at the local community level and to necessitate extra-community assistance. They also see water-related problems as requiring a relatively low level of community coordination and as being primarily the responsibility of the public sector. Local governmental leaders were seen as being more important in problem solving in water-related problems than they were in other community problems. 相似文献
4.
Speciation and distribution of copper in a mining soil using multiple synchrotron-based bulk and microscopic techniques 总被引:1,自引:0,他引:1
Jianjun Yang Jin Liu James J. Dynes Derek Peak Tom Regier Jian Wang Shenhai Zhu Jiyan Shi John S. Tse 《Environmental science and pollution research international》2014,21(4):2943-2954
Molecular-level understanding of soil Cu speciation and distribution assists in management of Cu contamination in mining sites. In this study, one soil sample, collected from a mining site contaminated since 1950s, was characterized complementarily by multiple synchrotron-based bulk and spatially resolved techniques for the speciation and distribution of Cu as well as other related elements (Fe, Ca, Mn, K, Al, and Si). Bulk X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopy revealed that soil Cu was predominantly associated with Fe oxides instead of soil organic matter. This agreed with the closest association of Cu to Fe by microscopic X-ray fluorescence (U-XRF) and scanning transmission X-ray microscopy (STXM) nanoanalysis, along with the non-occurrence of photoreduction of soil Cu(II) by quick Cu L3,2-edge XANES spectroscopy (Q-XANES) which often occurs when Cu organic complexes are present. Furthermore, bulk-EXAFS and STXM-coupled Fe L3,2-edge nano-XANES analysis revealed soil Cu adsorbed primarily to Fe(III) oxides by inner-sphere complexation. Additionally, Cu K-edge μ-XANES, L3,2-edge bulk-XANES, and successive Q-XANES results identified the presence of Cu2S rather than radiation-damage artifacts dominant in certain microsites of the mining soil. This study demonstrates the great benefits in use of multiple combined synchrotron-based techniques for comprehensive understanding of Cu speciation in heterogeneous soil matrix, which facilitates our prediction of Cu reactivity and environmental fate in the mining site. 相似文献
1