@article{fdi:010052958,
  title = {{M}obility of metals in nickel mine spoil materials},
  author = {{R}aous, {S}. and {B}ecquer, {T}hierry and {G}arnier, {J}. and {M}artins, {E}. {D}. and {E}chevarria, {G}. and {S}terckeman, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}n understanding of the biogeochemical behaviour of metals in mine spoil materials is a prerequisite to rehabilitate {N}i mining sites. {T}he objective of this study was to characterize the fate of metals in different {N}i ore spoil materials as influenced by hydrological conditions and fertilisation practices. {I}n tropical ultramafic complexes, the different stages of lateritic weathering lead to two types of ores, and therefore, to two spoil types. {T}hey are mainly either a clay-rich saprolite, so-called "garnierite", enriched in phyllosilicates, or a limonitic material, enriched in {F}e oxides. {L}ysimeter columns were designed to monitor leaching waters through both spoil materials. {T}he garnieritic spoil released higher concentrations of {M}g (mean = 2.25 mg {L}-1), {N}i (0.39 mg {L}-1) and {C}r (1.19 mg {L}-1) than the limonitic spoil ({M}g = 0.5 mg {L}-1: {N}i = 0.03 mg {L}-1 and {C}r = 0.25 mg {L}-1). {C}hromium was mainly in an anionic form in leaching solutions. {A}s exchangeable pools of {C}r({VI}) in limonite (980 mg kg(-1) of {KH}2{PO}4-extractable {C}r) are considerable its release in water may still occur in the case of a p{H} increase. {I}n mixed spoil, metal concentrations were almost as low as in the limonitic one. {T}he effect of mineral-{N} fertilisation was a strong release of cations ({N}i, {M}g) into the leachate. {P}hosphate amendment did not affect the soil solution composition under experimental conditions.},
  keywords = {},
  booktitle = {},
  journal = {{A}pplied {G}eochemistry},
  volume = {25},
  numero = {11},
  pages = {1746--1755},
  ISSN = {0883-2927},
  year = {2010},
  DOI = {10.1016/j.apgeochem.2010.09.001},
  URL = {https://www.documentation.ird.fr/hor/fdi:010052958},
}