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Table 2 Comparison of Cr (VI) removal capacity at equilibrium treated by hollow PANI micro/nanospheres before and after regeneration

From: Preparation of Hollow Polyaniline Micro/Nanospheres and Their Removal Capacity of Cr (VI) from Wastewater

  qe (the initial PANI) (mg g−1) qe (the 1st regeneration) (mg g−1) qe (the 2nd regeneration) (mg g−1)
pH = 3 78.88 78.84 59.87
pH = 4 37.73 37.73 31.66
pH = 5 21.43 21.43 12.84