Why acid sulfate soil became more acidic when water drain out?

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Paul Milham

The acidity results from oxidationof the Fesulfides which produces sulfuric acid

Ashokkumar V. Rajani

Yes, Paul sir it is due to oxidation

Tamjid Us Sakib

When water is drained out from soil that creates oxidization condition which is responsible for increasing acidity of that soil.

yes it is so

Eliecer Miguel Cabrales Herrera

Los suelos sulfatados ácidos (SSA) se vuelven más ácidos cuando se drenan, debido a que el azufre se oxida y se genera más sulfatos y protones:

S + O2 --> SO3

SO3 + H2O --> H2SO4

H2SO4 --> 2H + SO4