METHOD FOR THE PRODUCTION OF A MATERIAL OF PLANT ORIGIN THAT IS RICH IN PHENOLIC ACIDS, COMPRISING AT LEAST ONE METAL, FOR CARRYING OUT ORGANIC SYNTHESIS REACTIONS
The invention relates to a method for the production of a material of plant origin that is rich in phenolic acids, comprising at least one metal, said method comprising the following steps: a) producing a material of plant origin selected from among aquatic plants, tannin-rich materials, lignin-rich materials, and obtaining a material of plant origin that is rich in phenolic acids, in which the ratio of the intensity of the vibration band of the C=O bond of the COOH group and the intensity of each of the vibration bands of the aromatic ring, determined using FT-IR, is between 0.5 and 4, preferably between 1 and 3.5, e.g. between 1 and 2.5; b) bringing the material of plant origin obtained in step (a) into contact with an effluent comprising between 0.1 and 1000 mg/L of at least one metal, preferably for a period of between 1 and 2 hours, at a temperature that is preferably between 10 and 30°C; and c) obtaining a material of plant origin that is rich in phenolic acids, comprising between 1 and 30 wt.-% of at
