METHOD FOR PRODUCING humic acids to detoxify soil, sewage sludge and ash residues from the incineration of municipal solid waste

摘要

A process for preparing humic acids for the detoxification of soils, sludges and ash residues from the incineration of municipal solid waste, comprising the alkaline extraction of humic acids, lignite, characterized in that after the extraction is carried out the separation of the final product of fulvic acids by precipitation in acid medium at a pH of 4 ÷ 6, followed by filtration, drying, grinding and driving the active state by mixing with the addition of 10-15% potassium hydroxide or sodium hydroxide.