Arsenic mobilization in groundwater at Quirra Plain (Sardinia, Italy)
The plain of Quirra in Sardinia is subjected to persistent As contamination, which affects soils,sediments and the shallow aquifer exploited in summer for watering part of the land. The upstream abandoned mining area of Baccu Locci is the primary source of As pollution. A hydrodynamic model of the shallow aquifer(water level less than 3 m below the surface) has been performed by Pilia (2005) and the results of this study serve as a starting point to investigate As distribution in groundwater and to produce a reactive transport model in the central part of the aquifer. High dissolved As content in groundwater (up to 1 mgL-1) is observed only in areas frequently overflooded with contaminated sediments. When a reactive transport model is performed, it is observed that dissolved As is adsorbed along the flow direction according the isothermS =0.00054·Fe(total)2.4·C0.88 where S is As adsorbed by sediments (mgkg- 1), Fe is total dissolved iron (mgL- 1) and C is dissolved As (mgL-1).
L.Fanfani A.Pilia
Department of Earth Science, University of Cagliari, Cagliari, Italy
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
1227-1230
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）