Fig. 7. Effect of pH on 2,4-DCP removal from aqueous solution using NiFe2O4 nanoparticles (a) and NiFe2O4/PAOT nanocomposite (b) [conditions: initial conc. of 2,4-DCP solution = 30 mg L−1, volume of solution = 50 mL, contact time = 4 h and 2 h, and adsorbent dose = 0.04 g and 0.03 g for (a) and (b); respectively].
