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151.
Polycyclic aromatic hydrocarbon composition in soils and sediments of high altitude lakes 总被引:9,自引:0,他引:9
Grimalt JO van Drooge BL Ribes A Fernández P Appleby P 《Environmental pollution (Barking, Essex : 1987)》2004,131(1):13-24
Polycyclic aromatic hydrocarbons (PAH) in lake sediments and nearby soils of two European high mountain regions, Pyrenees and Tatra, have been studied. Similar mixtures of parent PAH were observed in all cases, indicating predominance of airborne transported combustion products. Nevertheless, the composition of these atmospherically long-range transported PAH was better preserved in the superficial layers of soils than sediments. This difference points to significant PAH degradation process, e.g. during lake water column transport, before accumulation in the latter. Post-depositional transformation was also different in both types of environmental compartments. Thus, lake sediments exhibit higher preservation of the more labile PAH involving lower degree of post-depositional oxidation. However, they also show the formation of major amounts of perylene by diagenetic transformation in the deep sections. This compound is not formed in soils where downcore enrichments of phenanthrene are observed, probably as a consequence of diagenetic aromatization of diterpenoids. 相似文献
152.
In the present work, potential groundwater pollution by methabenzthiazuron (MTBU) and the effect of three different amendments (composted sheep manure, composted pine bark and spent coffee grounds) on its mobility were investigated under laboratory conditions. The efficiency of ZnO and TiO2 suspensions in the photocatalytic degradation of MTBU in leaching water was also investigated. The relative and cumulative breakthrough curves were obtained from disturbed soil columns. The presence and/or addition of organic matter drastically reduced the movement of the herbicide. On other hand, photocatalytic experiments showed that the addition of ZnO and TiO2 strongly enhances the degradation rate of this herbicide compared with the results of photolytic experiments under artificial light. ZnO appeared to be more effective in MTBU oxidation than TiO2. The results obtained point to the interest of using organic wastes and heterogeneous photocatalysis for reducing the pollution of groundwater by pesticide drainage. 相似文献
153.
Ahmed Farhan Kousar Shazia Pervaiz Amber Trinidad-Segovia Juan E. del Pilar Casado-Belmonte Maria Ahmed Wisal 《Environmental science and pollution research international》2022,29(5):6871-6885
Environmental Science and Pollution Research - The objective of this study is to contribute to the existing debate of green economic growth by empirically investigating the role of cleaner energy... 相似文献