Iron oxy-hydroxide Fe(OH)3 ...
Published by Stuart Widdowson, Reed beds & Industrial Wastewater at ARM Limited
Iron oxy-hydroxide Fe(OH)3 will "adsorb" some heavy metals. Vertical flow compost based reed beds appear to be effective for Cu removal. VF compost beds can also be utilised for Zn immobilised as either sulphide or carbonate. These passive techniques are all dependent upon water chemistry - mainly interrelationship of alkalinity (v. important) , acidity & pH etc