Al-Ferron kinetics and quantitative calculation of Al(III) species in polyaluminum chloride coagulants

作者：Zhou WZ; Gao BY^*; Yue QY; Liu LL; Wang Y

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2006, 278(1-3): 235-240.

DOI：10.1016/j.colsurfa.2005.12.024

• high-concentration polyaluminum chloride
• sulfate
• silicate
• Al-ferron kinetics
• Al species calculation

The effect of prehydrolysis and the presence of silicate and/or sulfate on polyaluminum coagulants were investigated. A new Al-Ferron kinetics method was developed to monitor and calculate Al speciation. The results showed that the Al-Ferron kinetics fit a binary pseudo first order rate equation. Sulfate and silicate had different influences on Al-Ferron kinetics. Al-Ferron complexation timed spectrophotometry is the commonly used method of determining Al speciation but this new Al-Ferron kinetics calculation method shows different species distributions. For all the coagulants except polyaluminum silicate chloride (PASiC), the new method yielded higher Al-b and lower Al-a values. The Al(HI) chemical species calculated using Al-Ferron kinetics is more consistent with the experimental results.

• 出版日期2006-4-20
• 单位山东大学