Abstract Jarosite sludge coming from the hydrometallurgical zinc production route is a hazardous material, which currently neutralized and landfilled by so-called Jarofix® process. The present study aims to assess mechanical metallurgical properties of briquettes made jarosite powder with blast furnace sludges, acting as reductant recover iron oxide in form pig produce an inert slag, increasing...

Introduction: Sulfates have been identified on Mars by orbital remote sensing (OMEGA and CRISM) and during surface exploration (Viking, MER) [1-4]. MER rovers have found Fe-sulfates at both landing sites. A ferric sulfate (jarosite) was identified with the Mössbauer spectrometer (MB) in Meridiani Planum outcrops (~10 wt.%) [5]. At Gusev Crater, light-toned salty soils are hydrous as seen by Min...

northwest of shir-kuh batholith, a number of leucocratic granitic and granodioritic plutons have intruded sedimentary hosts including shale-sandstone (triassic-jurassic) and sandstone-conglomerate (lower cretaceous). contact metamorphism and hydrothermal alterations are widespread. late alteration assemblage mainly occurs in arkosic sandstones of sangestan formation and includes propylitic, qua...

in this work, we developed a method which combined the processes of acid-leaching, ammonium jarosite precipitating and electro-depositing to recover copper and nickel from electroplating sludge. residual sludge from an electroplating plant located in qingdao was used for acid-leaching, and more than 95% of copper, nickel, zinc, chromium and iron were extracted from the sludge. after acid-leachi...

Phlogopite flakes strewn on the soil of Caldara di Manziana (Italy) display multiple minute perforations. The site is a caldera linked to recent volcanism (90 ka 0.8 Ma) with present emanations CO2 (~150 t d−1) and H2S (~2.55 d−1). Stereomicroscopy SEM–EDX observation phlogopite crystals shows holes depressions <200 µm 2 mm across. They are circular, pseudo-hexagonal, or irregular. Within de...

Bio-oxidation of arsenic-bearing gold concentrate is generally slow and prone to passivation. To alleviate this concern, it pivotal explore the possible catalysts reduce passivation during bio-oxidation. In present work, enhancing effects Ag+, ethylenediamine tetraacetic acid (EDTA) oxalate (Ox) on bio-oxidation mechanisms were investigated by leaching experiments, thermodynamic calculation, XR...