scispace - formally typeset
Search or ask a question
Topic

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.


Papers
More filters
Patent
17 Mar 1993
TL;DR: In this article, a process for treating industrial waste water containing hexavalent chromium (Cr+6) and other heavy metals is described, which comprises reduction of Cr+6 to trivalent Chromium and the precipitation thereof with other heavy metal by addition of sulfide ion and ferrous ion to the waste stream at a pH of about 7 to 9 under conditions such that sludge production by the process of the invention is substantially less than that characteristic of prior art processes.
Abstract: A process for treating industrial waste water containing hexavalent chromium (Cr+6) and other heavy metals is disclosed which comprises reduction of Cr+6 to trivalent chromium (Cr+3) and the precipitation thereof with other heavy metals by addition of sulfide ion and ferrous ion to the waste stream at a pH of about 7 to 9 under conditions such that sludge production by the process of the invention is substantially less than that characteristic of prior art processes. Polymers are added to the solution to assist flocculation and clarification of the waste stream. More specifically, the invention comprises adding sulfide ion in a sulfide to hexavalent chromium ratio of about 0.7-2.5:1 and adding ferrous ion in a ferrous to hexavalent chromium ratio of about 0.5-5.0:1. The waste stream pH is preferably maintained in the range of about 7.2 to 7.5.

28 citations

Journal ArticleDOI
TL;DR: Spectroscopic analyses of fractions obtained from a size exclusion column showed varying absorption spectra indicating a significant dispersion in size-distribution of nanocrystallites at lower sulfide/Cd(II) ratios, however, size distribution of the nanocrystalites was narrower at initial sulfide /Cd ratios that exceeded 1.0.

28 citations

Journal ArticleDOI
R. Priya1, S. Kanmani1
TL;DR: In this paper, two solar slurry photocatalytic reactors, batch reactor (BR) and batch recycle reactor with continuous supply of inert gas (BRRwCG), were developed for comparing their performance.

28 citations

Patent
19 Apr 1976
TL;DR: In this article, the authors removed selenium from copper electrolytes by adding a substance selected from the group consisting of metals above copper in the electromotive series, excluding alkali metals, such as nickel powder, cobalt powder and iron powder.
Abstract: Selenium is removed from copper electrolytes by adding a substance selected from the group consisting of metals above copper in the electromotive series, excluding alkali metals, such as nickel powder, cobalt powder and iron powder. Sodium sulfide can also be used along with a subsequent addition of ferric sulfate. The amount of the reactive substance added should be sufficient to reduce the selenium content to below 2 ppm.

28 citations

Journal ArticleDOI
01 Sep 1986
TL;DR: In this article, a solution of sodium tricarbonatouranate (Vl) with sodium sulfide was used to form hydrated uranium oxide (HOO) particles.
Abstract: Colloidal particles of hydrated uranium oxide were formed by reducing a solution of sodium tricarbonatouranate(Vl) with sodium sulfide. These particles were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and Fourier Transform infrared spectroscopy. Particle size was determined by photon correlation spectroscopy. Depending on conditions, the particles that formed consisted of either a mixed valency (U(IV) and U(VI)) uranium oxide or a complex uranium(VI) hydrous oxide. The mixed valency uranium oxide particles showed nearly spherical morphology, whereas the complex uranium(VI) hydrous oxide consisted of irregularly shaped particles. Electrokinetic measurements showed that both types of particles were negatively charged in near-neutral media.

28 citations


Network Information
Related Topics (5)
Carbon
129.8K papers, 2.7M citations
82% related
Aqueous solution
189.5K papers, 3.4M citations
80% related
Catalysis
400.9K papers, 8.7M citations
79% related
Photocatalysis
67K papers, 2.1M citations
79% related
Adsorption
226.4K papers, 5.9M citations
78% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202233
202136
2020107
2019143
2018172