Interaction of PACls with sulfate.
This article discusses the influential factors on Al13 separation considering the interaction of sulfate with various polyaluminum chloride (PACl). The experimental results showed that the basicity (B = [OH/[Al]), the concentration of PACl and Al/SO4 ratio exhibited significant roles in the PACl-sulfate reaction. It indicated that different species in various PACl underwent different reaction pathway with sulfate. The Alc, colloidal species, formed precipitation quickly with sulfate, while Alb, oligomers and polymers, underwent slow crystallization. And Ala, monomers, reacted with sulfate to form soluble complexes. The kinetic difference of reaction made it possible to realize the separation of Alb and further purification. The decrease of Ala resulted in the limit of ferron method was also mentioned.
Xu
Yi
Y
SKLEAC, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Wang
Dong-sheng
DS
Tang
Hong-xiao
HX
D000536:Aluminum Hydroxide / Q000737:chemistry*; D005427:Flocculation; D007700:Kinetics; D013431:Sulfates / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
D013431:Sulfates; C016213:aluminum oxychloride; D000536:Aluminum Hydroxide