Question

the reaction of heavy metals ion with ...
gives metal sulphide​

Answer 1

Answer:

various physical/chemical treatments for heavy metal removal (Dean et al., 1972; ... metal carbonate, and metal sulfide species. ... reaction, the increase in the sludge volume is minimal.

Answer 2

The reaction of heavy metals ion with  Sulfur gives metal sulfide​.

Explanation:

• The reaction of heavy metals such as active metals like sodium, zinc, iron gives metal sulfide​s when reacted with sulfur vigorously
• $Fe + S ---- FeS$
• It also reacts slowly with non-reactive metals like copper and silver, to form sulfides.
• Sulfur reacts with most heavy metals to form a sulfide.
• It’s a member of the Group 16 elements known as “chalcogens”
• Here the reaction requires the metal to be molten.
• In the case of mercury, which is molten at room temperature, the reaction with sulfur takes place before your eyes, changing from yellow powder and silver metal to brick red sulfide.
• Scattering sulfur on it is the traditional way to deal with a mercury spill.