title: [Microstructure morphology and flocculation mechanism of the decolorizing flocculant poly-aluminum (III)-magnesium (II)-sulfate].
abstract: Crystal structures and morphologic characteristics of poly-aluminum (III)-magnesium (II)-sulfate (PMAS) were discussed using X-radial diffraction and infrared spectrogram and the flocculation mechanism was explored here based on comparisons between decolorization effect of landfill leachate secondary effluent and the system Zeta potential. The results indicated that PMAS was a kind of macromolecular composite polymer of aluminum and magnesium based on -OH bonding. The flocculation mechanism of PMAS was mainly charge neutralization and co-precipitation netting. Charge neutralization was the main mechanism at low dose. Its flocculation behaviors were different along with different pH of wastewater at high doses, namely, it was mainly charge neutralization at low pH and co-precipitation netting at high pH and both of them work together at neutral condition.
authors.affiliation: Department of Environmental Engineering, Teaching and Experimental Center of Environmental Engineering, Beijing Institute of Petrochemical and Technology, Beijing 102617, China. soundym@126.com
authors.forename: Yi-min
authors.initials: YM
authors.lastname: Sang
authors.forename: Xue-hong
authors.initials: XH
authors.lastname: Chang
authors.forename: Yue
authors.initials: Y
authors.lastname: Che
authors.forename: Qing-bao
authors.initials: QB
authors.lastname: Gu
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D008274:Magnesium / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000535:Aluminum; D008274:Magnesium; D011108:Polymers; D013431:Sulfates; D062065:Wastewater; D014874:Water Pollutants, Chemical