Role of quantitative mineralogical analysis in the investigation of sites contaminated by chromite ore processing residue

Reduction and immobilization of chromate in chromite ore processing residue with nanoscale zero-valent iron

“…The mineral assemblage of untreated COPR in this study was consistent with COPR mineralogy reported previously [35,36]. Cr(VI)-bearing minerals identified in the untreated COPR included hydrocalumite and katoite hydrogarnet, which are demonstrated hosts for Cr(VI) in COPR samples through anionic substitution [35,37]. The diminished peak intensity of katoite in treated samples indicated that the mineral substantially dissolved.…”

Mineralogy and chemical forms of lead and zinc in abandoned mine wastes and soils: An example from Morocco

“…Direct methods are more sophisticated than chemical methods and need a high level of specialization to be routinely included in metal speciation studies. Nevertheless, a complementary use of the chemical and mineralogical approaches may provide a more realistic picture of the actual forms of heavy metals in solid matrices (Adamo et al, 2002;Hillier et al, 2003;Ryan et al, 2008;Venditti et al, 2000a,b).…”

Determining the composition of mineral-organic mixes using UV–vis–NIR diffuse reflectance spectroscopy

“…X-ray powder diffraction (XRPD), they are usually involved, time-consuming and expensive (e.g. Hillier et al, 2003). This paper presents our initial attempt to develop a rapid, cheap, accurate and non-destructive method to determine the mineralorganic composition of soil using diffuse reflectance spectroscopy (DRS) in the ultra violet (UV), visible (vis) and near infrared (NIR) portions of the electromagnetic spectrum.…”