The interaction of a soil fulvic acid with precipitating hydrous ferric oxide at pH = 6

摘要: A kinetic method of analysis which distinguishes Fe(II) from Fe(III) and forms various labilities each other is based on spectrophotometric monitoring the reaction with ferrozine. Reduction hydroxylamine hydrochloride allows single colourimetric reagent to detect all Fe. The applied study effects a well characterized soluble soil organic acid sample, fulvic acid, speciation under conditions (pH = 6) where colloidal hydrous oxide in absence acid. effect greatly increase lability compared that colloid. However, ultrafiltration light scattering experiments indicate – species larger than ferric colloid particles. Kinetic studies show can act as reducing agent for iron presence an comple...