A trial of extracting gold from stream sediment and High Au/Ag ore ...

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A trial of extracting gold from stream sediment and High Au/Ag ore ...

2. Deposition

In order to check a condition for

deposition of gold from HOS, water

and ascorbic acid were added step by

step. Intervals of each step are around

20 minutes.

This graph shows variation of

concentration for water and ascorbic

acid in HOS with 0.175% of gold.

At 1st and 2nd steps, gold

precipitation did not occur, however

I 3-

ion was lost. Deposition of gold

starts at high water content with

making fine-grained particles.

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