[Image and coagulation behavior of colloidal hydrated manganese dioxide flocculate particles].
The structure and image of colloidal hydrated manganese dioxide flocculate particles and the electrical charge characteristic of colloidal hydrated manganese dioxide were studied by transmission electron microscope (TEM) and zeta potential (ZP) measurement. The surface chemistry characteristic of colloidal hydrated manganese dioxide was characterized by IR spectra and XRD technology etc. Then the coagulating property and behavior of the colloidal hydrated manganese dioxide produced by KMnO4 were also studied by jar test. The results show that the colloidal hydrated manganese dioxide shows negative electricity in doubly distilled water and raw water. The diameter of the particles is about 10 nm and its flocculate shows network structure which benefits to adsorbing-bridging in doubly distilled water. It has abundant surface hydroxyl radical and its specific surface is 151.422 m2/g. It belongs to delta-MnO2. So it exhibits surface chemistry of excellent removal pollutants. It gives best coagulation efficiency and good effect of removal organic pollutants to raw water in a low dosage.
Yang
Wei
W
School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. yangweixx@163.com
Yang
Yan-ling
YL
Li
Xing
X
Li
Gui-bai
GB
D000327:Adsorption; D003102:Colloids / Q000737:chemistry; D005427:Flocculation; D005618:Fresh Water / Q000032:analysis; D017895:Manganese Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D003102:Colloids; D017895:Manganese Compounds; D010087:Oxides; D014874:Water Pollutants, Chemical; C016552:manganese dioxide