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Problems in recovering gold from soil

Q. Hi
I have an Aqua Regia.

• If I remove nitric acid with urea from aqua regia, tin chloride test does not show the presence of gold.

• If I add iron sulphate to Aqua Regia, the Aqua Regia solution turns black but nothing precipitates.

Please help me.

nastarn khosravi
- iraq karbala
June 5, 2021

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June 6, 2021

Q. Hello
Thank you for your answer.
I'm a girl named Nastaran and I like to learn how to extract gold from the soil.
I am not fluent in English and have a hard time understanding what others are saying and writing, so I apologize to you.
Chlorine and nitric gas bother me a lot and I have a severe headache.
I have no other money to buy protective equipment unless I can extract gold from the soil.
I bought some gold soil.
My soil is alluvial and has sulfur and I think it is alkaline.
Because it does not react with baking soda but reacts strongly with vinegar ⇦in bulk on eBay or Amazon [affil links] .
In my opinion, this soil is rich in iron, zinc, copper, lead, nickel, etc.
I roasted the soil at 600° C.
And then I washed the soil with water.
And then I put this soil in Aqua Regia for a week.
And then I separated the soil from Aqua Regia (filtered)
I added some sulfuric acid to the solution and removed the lead.
And I did a tin chloride test, and that shows the presence of gold.
But if I use urea, the tin chloride test will no longer show gold.
I continued to use ferrous sulfate ⇦this on eBay or Amazon [affil links] to precipitate gold, but my solution changed from yellow to black, but nothing precipitated. If I wait a month, this color will remain black and nothing will precipitate.

nastarn khosravi [returning]
- iraq karbala