Fig. 7From: Towards sustainable production and utilization of plant-biomass-based nanomaterials: a review and analysis of recent developmentsReproduced with permission from Cai et al. [121] Wiley–VCH GmbH & Co. KGaA, WeinheimFractionation liquor dilution to precipitate lignin, followed by resin adsorption of residual dissolved lignin for recovering acid by crystallization through cooling after evaporation to re-concentrate.Back to article page