Results 31 to 40 of about 188,153 (288)
Tunable amylopectin graft copolymers for flocculating and dewatering iron ore tailings
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Polyacrylamide (PAM), the standard flocculant for mining tailings, often produces turbid supernatants and poorly dewatered sediments, limiting water reuse and tailings densification. We synthesized amylopectin‐graft‐poly[(2‐methacryloyloxy)ethyl]trimethylammonium chloride (AP‐g‐PMETAC) copolymers with systematically varied graft frequency (N =
Gustavo P. Zago +2 more
wiley +1 more source
CHEMICAL COMPOSITION AND TRACE ELEMENT PATTERN OF A PYRRHOTITE-PYRITE NODULE FROM THE DERGAMYCH CO-BEARING MASSIVE SULFIDE DEPOSIT, SOUTH URALS [PDF]
Минералогия, 2018 Distribution of trace elements of pyrrhotite-pyrite nodule from sulfide-serpentinite «gravelites» of the Dergamysh Co-bearing massive sulfide deposit is studied using LA ICP MS method. The nodule is zonal with a central porous core composed of pyrrhotite
I.Yu. Melekestseva +3 more
doaj
Scientific Reports, 2022 Diamonds grown by high pressure high temperature process (HPHT) are usually characterized by yellow color and high contents of nitrogen. Introduction of Ti decreases nitrogen content in diamond.
Valeri Sonin +8 more
doaj +1 more source
, 1997 This resource is a 43 page pdf document on the principals of optical mineralogy. Topics include light, the polarizing light microscope, the refractive index, optical classes and indicatrix theory, the relationship of optical properties to crystal ...
Mickey Gunter
core
The Canadian Journal of Chemical Engineering, EarlyView.This research explored South African iron‐rich sand (SAIRS) as a natural catalyst for light‐mediated wet peroxide oxidation of methyl orange dye in wastewater and at an optimized of conditions of 3500 mg/L catalyst dose, 6 mM H2O2, and pH 2.5, SAIRS achieved 94% methyl orange degradation within 90 min under visible light.
Aaliyah Ebrahim +3 more
wiley +1 more source
MINERAL COMPOSITION OF SEDIMENTS OF TIDAL ZONE OF GUYANA, SOUTH AMERICA [PDF]
Минералогия, 2018 The mineral composition of the mud halo of the Guyana coast is studied. Terrigenous quartz and feldspars are totally dominant in pelitic sediments of the littoral zone accompanied by terrigenous and organic calcite, variable amount of kaolinite, hydrated
K.A. Novoselov +3 more
doaj
Isheyevo Meteorite: Genetic link between CH and CB chondrites? [PDF]
, 2006 Based on the mineralogy, petrography, bulk chemical, oxygen, and nintrogen isotopic compositions and 40Ar-39Ar age, Isheyevo is genetically related to CH and CB carbonaceous chondrites and provides a link between these group of pristine ...
Brandstätter, F. +7 more
core
Jarosite versus Soluble Iron-Sulfate Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina [PDF]
, 2014 Secondary jarosite and water-soluble iron-sulfate minerals control the composition of acid mine waters formed by the oxidation of sulfide in tailings impoundments at the (Zn-Pb-Ag) Pan de Azúcar mine located in the Pozuelos Lagoon Basin (semi-arid ...
Alicia Kirschbaum +5 more
core +3 more sources
The Canadian Journal of Chemical Engineering, EarlyView.Abstract This study proposes a novel, green, and sustainable method for synthesizing magnetic iron oxides from metallurgical copper slag (CS), leveraging its iron content as a valuable resource. Iron was extracted via acid leaching using edible citric acid (ECA), forming a citrate–iron complex (CSL), which was subsequently thermally decomposed at 300°C
Melisa Portilla‐Sangabriel +4 more
wiley +1 more source
MINERAL COMPOSITION OF PROCESSING WASTES OF TITANOMAGNETITE ORES FROM THE KUSA DEPOSIT (SOUTH URALS) [PDF]
Минералогия, 2016 The dumps of processing wastes (tales) of titanomagnetite ores from the Kusa deposit located in the southwestern margin of the settlement of Magnitka, Chelyabinst district (South Urals) began to form in 1948.
V.I. Popova +3 more
doaj