Behavior of nickel at the surface of an Alpine sediment. Influence of organic matter
The objective of this paper is to quantify the role of Natural Organic Matter in the retention processes of Ni on a natural sediment, sampled at two distinct depths. To assess the relevance of organic and mineral sites, adsorption experiments were carried out, on calcinated and non calcinated sediments, for the two depths investigated. The results have shown that the retention of Ni on the mineral surface sites could be described with one surface complex on a global mineral site. Due to the dual effect observed in the presence of organic matter, it was necessary to consider the formation of a ternary surface complex, and a Ni-organic matter complex in solution to account for the observed experimental results. Calculations have shown that mineral and organic functional groups were of same kind for the 2 depths and that the amount of organic matter was responsible for the enhancement of Ni adsorption at low pH values.
C.Hurel N.Culemme N.Marmier
LRSAE - Nice Institute of Chemistry - Science Faculty, University of Nice Sophia Antipolis,Nice, France
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
1235-1238
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）