Fig. 7From: Chitosan impregnation of coconut husk biochar pellets improves their nutrient removal from eutrophic surface waterEffect of different initial pH values on nutrient adsorption in single and mixed solute solutions; (a) NH4+ adsorption; (b) NO3− adsorption; (c) PO43− adsorption (SS = single solute and MS = mixed solute)Back to article page