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Sodium sulfide

About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.


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Patent
17 Sep 1984
TL;DR: In this article, the residual hypochlorite contained in chlorinated slurries of either carbonaceous gold-containing ores or mixtures of carbonaceous and oxide gold containing ores was reduced by reaction with sulfide ion-providing chemical compounds.
Abstract: Residual hypochlorite contained in chlorinated slurries of either carbonaceous gold-containing ores or mixtures of carbonaceous and oxide gold-containing ores are reduced by reaction with sulfide ion-providing chemical compounds preferably sodium hydrosulfide, sodium sulfide or hydrogen sulfide The hypochlorite "kill" step enables subsequent cyanide leach operations to be conducted more efficiently

6 citations

Journal ArticleDOI
TL;DR: In this paper, the mechanism of the chemical and electronic passivation of the GaSb(100) surface with aqueous sodium sulfide solution was investigated by X-ray photoemission spectroscopy and via the monitoring of the solution pH value over the course of the surface exposure to the solution.
Abstract: The mechanism of the chemical and electronic passivation of the GaSb(100) surface with aqueous sodium sulfide solution is investigated by X-ray photoemission spectroscopy and via the monitoring of the solution pH value over the course of the surface exposure to the solution. Upon the exposure of the native-oxide-covered GaSb(100) surface to 1 M aqueous Na2S solution, the solution pH remains constant for 6 min, then increases suddenly for 1 min, and afterwards, it decreases steeply. During the first two minutes of exposure of the native-oxide-covered GaSb(100) surface to the solution, the amount of surface oxide drastically decreases and the surface becomes antimony-rich, whereas the GaSb surface electronic structure is affected only slightly. Longer exposure of GaSb(100) to the solution causes the accumulation of gallium sulfides and the oxidation of the semiconductor surface antimony atoms to elemental antimony. The extra electrons released due to such an oxidation reduce the protons split from the water molecules at the semiconductor/solution interface. These chemical processes are accompanied by the essential modification of the surface electronic properties, indicating the importance of the redox processes in the modification of the GaSb(100) surface electronic structure.

6 citations

Journal ArticleDOI
01 Jan 1995-Analyst
TL;DR: In this paper, a simple permeation device for the generation of low concentrations (ppb) of hydrogen sulfide is described, which is based on two solution sources, namely, sodium sulfide and thioacetamide, and its permeation through silicone rubber and Teflon membrane, respectively.
Abstract: A simple permeation device for the generation of low concentrations (ppb) of hydrogen sulfide is described. It is based on the generation of hydrogen sulfide from two solution sources, namely, sodium sulfide and thioacetamide, and its permeation through silicone rubber and Teflon membrane, respectively. The permeated hydrogen sulfide along with the carrier gas (air) was trapped in 10 ml of 0.1 mol l–1 NaOH–0.1% EDTA and analysed by a standard Methylene Blue method. The relative standard deviation for 10 determinations was found to be 4.9% at the 201 ppb level for one of the developed permeation devices.

6 citations

Journal ArticleDOI
TL;DR: In this paper, a field electrode method for the determination of total sulfide in water is described, which involves the use of preweighed sodium sulfide crystals in the standardization process.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202233
202136
2020107
2019143
2018172