Fig. 7From: Preparation of Hollow Polyaniline Micro/Nanospheres and Their Removal Capacity of Cr (VI) from Wastewatera Changes of Cr (VI) concentration at different times (initial Cr (VI) concentration: 1.2 mmol/L (62.4 mg/L), solution pH respectively at 3, 4, and 5), and b the pseudo-second-order models on removal kinetic of Cr (VI) with hollow PANI micro/nanospheresBack to article page