Assertion: lignin's effect | /r/HasProperty | evaluated within the ph range of ∼4.0 and 10.0
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text: To further confirm that electrostatic interactions are key mechanism of adsorptive removal of dyes in DB 1 dye in aqueous solutions, the effect of initial pH on the dye decolorization efficiency and zeta potential of aminated CELF lignin was evaluated within the pH range of ∼4.0 and 10.0 ( Figure 8 ).