Fig. 9From: Preparation of Hollow Polyaniline Micro/Nanospheres and Their Removal Capacity of Cr (VI) from WastewaterThe schematic diagram of Cr (VI) removal. a Wastewater containing Cr (VI) under acidic conditions, b adding PANI to wastewater containing Cr (VI), and c wastewater of Cr (VI) removalBack to article page