Extraction of zinc sulfate that utilizes in the manufacturing of food supplements by usage (Zn-C)‎ batteries wastes

Abstract EN

Spent zinc-carbon (dry cell) batteries have negative environmental effects.

It is necessary to save the environment from them and take back the mineral values from these batteries.

Many engineering materials were contained in the spent batteries.

A large amount of anode zinc (zinc casing) was occupied in spent batteries, therefore; it must be recovered on the form of a useful and essential chemical compounds that can be used in daily life.

It is found from the chemical composition an anode zinc (zinc casing), it was over 99 percent perspicuous with a very small percentage of traces metals in it.

Zinc sulfate was known as a significant food supplement for humans, animals and plants.

It can be made by investing the selective corrosion resulted from the chemical reaction between zinc metal and diluted sulfuric acid.

Thus, the zinc sulfate heptahydrate was produced.

Zinc sulfate heptahydrate resulted from corrosion reactions was tested by XRD and it was found similar to standard patterns.

The XRD pattern of zinc sulfate heptahydrate shows four major peaks happened at (2ϴ).

The most intense peak for zinc sulfate heptahydrate happened at 27.5°.

In addition, to hydrogen gas was produced as a by-product of that reaction.