Zinc sulfide with a trace of copper is used for photoluminescent strips for emergency lighting and luminous watch dials.
Several metal sulfides are used as pigments in art, although their use has declined somewhat due to their toxicity. Sulfide pigments include cadmium, mercury, and arsenic.
Natural occurrence
Many important metalores are sulfides. Significant sulfide minerals include:
Many sulfides are significantly toxic by inhalation or injection, especially if the metal ion is toxic. Additionally many sulfides, when exposed to a strong mineral acid, will release toxic hydrogen sulfide - and this includes your stomach acids!
Also, many sulfides are somewhat flammable, and a few are highly flammable. When a sulfide burns, the fumes usually include toxic sulfur dioxide (SO2) gas.
The hydrogen sulphide boundary is usually deepest in summer and shallowest in spring.
Garkavaya (unpublished data) recently recorded hydrogen sulphide concentrations of 1.5 to 2.25 ml/l in the lower water column on the north-western shelf at depths of 10-30 m.
Yet hydrogen sulphide on the shelf is still transitory, occurring primarily in summer and autumn, as intense water column mixing during winter and spring reoxygenates the bottom waters.
Hydrogen sulphide is produced continuously in all un-aerated manure storage systems, including shallow barn gutters, underground storage tanks or outside manure holding ponds or lagoons.
Because hydrogen sulphide is heavier than air, the gas has a tendency to accumulate on the surface of the manure.
During agitation, hydrogen sulphide is released from the manure in the same manner as carbon dioxide is liberated after shaking a carbonated soft drink.
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