[Coagulation behavior of Al13 species].
Coagulation behavior of Al13 species was examined in synthetic water with high alkalinity and high humic acid concentration from viewpoint of the transformation of Al hydrolysis products during the coagulation process. The results indicated that coagulation efficiency of Al coagulants positively correlated with the content of Al13 in the coagulation process. Aluminum chloride (AlCl3) was more effective than polyaluminum chloride (PACI) in removing turbidity and dissolved organic matter in the synthetic water because AlCl3 could not only generate Al13 species but also function as pH control agent in the coagulation process. During coagulation process pH control can improve coagulation process through regulating Al speciation, and AlCl3 benefited most from pH control.
Hu
Cheng-zhi
CZ
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Liu
Hui-juan
HJ
Qu
Jiu-hui
JH
D000536:Aluminum Hydroxide / Q000737:chemistry*; D005427:Flocculation; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D011108:Polymers / Q000737:chemistry; D014873:Water Pollutants / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D006812:Humic Substances; D011108:Polymers; D014873:Water Pollutants; C016213:aluminum oxychloride; D000536:Aluminum Hydroxide