[Study of polyaluminium ferric chloride (PAFC) aqueous solutions visible spectra: the relationship among their absorbance at 460 nm, basicities and total Fe(III) concentration of PAFC solutions].

Abstract

The visible spectra of forty-five synthesized polyaluminium ferric chloride (PAFC) aqueous solutions with different [OH]/[Al + Fe] (B) and nAl/nFe(molar ratio) were investigated. The results showed that their absorbances A of shoulder at 460 nm are all linear interrelationship with their B. We made the curve of absorbance A of PAFC with same B vs. nAl/nFe, there was a turning point. All of these points just located at the places of pH value rising higher in pH- nAl/nFe diagrams. For these reason, we thought that these points stand for the dynamic equilibrium of OH- between the polynucleus hydroxyl Fe(III) and Al(III). These points made certain relationship among the absorbance A at 460 nm, basicities and total Fe(III) concentration of PAFC solutions.

• Authors: X Zhang, Y Zhao, H Fan, G Yang, Y Lu, D Huang
• Journal: Guang pu xue yu guang pu fen xi = Guang pu (Guang Pu Xue Yu Guang Pu Fen Xi) Vol. 20 Issue 4 Pg. 577-80 (Aug 2000) ISSN: 1000-0593 [Print] China
• PMID: 12945383 (Publication Type: English Abstract, Journal Article)