Figure 6. Scanning Electron Microscope picture (a) before treatment (b) after treatment with chitosan at pH =7 mass loading =50mm, mixing 150 rpm

From

Reduction of COD and Color by Polymeric Coagulant (Chitosan)

Ram Krishna, Omprakash Sahu

Journal of Polymer and Biopolymer Physics Chemistry. 2013, 1(1), 22-25 doi:10.12691/jpbpc-1-1-4