Research Article

Effective and Simple NaOH-Modification Method to Remove Methyl Violet Dye via Ipomoea aquatica Roots

Figure 7

Regeneration studies of NaOH-KR spent on adsorption of MV for 5 consecutive cycles with acid (pink bar), base (purple bar), water (yellow bar), and control experiment (blue bar) (mass of  g; concentration of  mg L-1).