Bacterial adhesion to mineral surfaces plays an important role not only in bacterial survival in natural ecosystems, but also in mining industry applications. Selective adhesion was investigated with Thiobacillus ferrooxidans by using four minerals, pyrite, quartz, chalcopyrite, and galena. Escherichia coli was used as a control bacterium. Contact angles were used as indicators of hydrophobicit...

The adsorption of Mycobacterium Phlei cells on the surfaces of pyrite and sphalerite was studied as functions of time and pH. The results indicated that a higher amount of cells adsorbing onto pyrite compared with that onto sphalerite under neutral and alkaline conditions, and it was also observed from photographs of scanning electron micrograph. To gain a better insight into the mechanisms of ...

The kinetics and mechanisms of dissolution of the major base metal sulphide minerals, pyrite, chalcopyrite, galena and sphalerite in acidic (chloride) media have been investigated. Minerals were ground in air, then dissolved in air-equilibrated solutions at pH 2.5, while monitoring the redox potential. Solution samples were analysed by ICP-AES and HPLC, and surfaces of residual sulphides analys...

Extensive horizons of pyritic shale occur in Mid-Proterozoic sediments of the eastern Belt basin, Montana, U.S.A. These pyritic shales are of striped appearance. Laminated pyrite beds alternate with non-pyritic shale beds. Laminated pyrite beds have wavy-crinkly internal laminae and are interpreted as mineralized microbial mats. Pyrite is essentially the only sulfide mineral in these shales. Py...

In this paper are presented general geological data for the polymetallic Hajvalia deposit. particular, we have scientific results regarding chemical and mineralogical composition of sulfur mineralizations from The distribution main metals used during mining activity in deposit has been studied with special emphasis. From microscopic description mineral samples deposit, following compositions re...

Microbacterium profundi strain Shh49(T) was isolated from deep-sea sediment from a polymetallic nodule area located in the East Pacific Ocean. Strain Shh49(T) contains genes related to the reduction/oxidation of metals. It has potential application in the bioremediation of heavy metal-contaminated environments.

The oceanic seabed contains a variety of mineral resources related exclusively to submarine environments. Limited information has been documented for the offshore Chile, which is particularly interesting due its geodynamic context and large area. Mineralogical geochemical analyses 16 sites within Chiloé–Taitao area, from 83 3388 m in depth, were carried out. most abundant minerals are quartz, f...

Authors Response to the Comments by Reviewer 3 General comments Reviewer’s Comment: The manuscript “Pyrite Oxidation under initially neutral pH conditions and in the presence of Acidithiobacillus ferrooxidans and micromolar hydrogen peroxide” submitted by Y. Man and C. Lin, is interesting in so far as the studies about this issue are relatively scarce. However, in my opinion, selected pyrite cu...

The Fule deposit is a typical Cd-, Ge- and Ga-enriched Pb-Zn located in the southeast of Sichuan–Yunnan–Guizhou polymetallic ore province China. Zoned, euhedral cubic pentagonal dodecahedral anhedral pyrites were observed, they are thought to comprise two generations. First generation pyrite (Py1) homogeneous entirely confined crystal core, whereas second (Py2) forms bright irregular rims aroun...