Isolation of Humic Substances Using Waste Wood Ash Extracts: Multiparametric Optimization via Box-Behnken Design and Chemical Characterization of Products
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This study evaluated birch and oak ash extracts as alternative extractants for isolating humic substances (HSs) from peat and lignite. The effects of ultrasound intensity, extraction time, and temperature were optimized using a Box-Behnken design and validated... ...
