UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Speciation stability of inorganic polymer flocculant-PACl

Wang, DS; Sun, W; Xu, Y; Tang, HX; Gregory, J; (2004) Speciation stability of inorganic polymer flocculant-PACl. COLLOID SURFACE A , 243 (1-3) 1 - 10. 10.1016/j.colsurfa.2004.04.073.

Full text not available from this repository.

Abstract

The speciation distribution, physico-chemical properties of coagulants, and principles for their further species transformation under various water and wastewater treatment conditions are of paramount importance in coagulation processes. In this paper, the effect of various factors on the speciation transformation of typical inorganic polymer flocculants (IPFs)-polyaluminum chloride (PACl) was investigated by ferron assay. Dilution and co-existing electrolyte exhibit little effect on the speciation distribution of PACl after dosing. Solution pH has significant effect on the species transformation, depending mainly on OH/AI ratio (denoted as B value). The lower the B value, the more significant the effect pH exhibits. A large amount of Al-b, i.e. rapid reactive species by ferron assay, could form for alum and PACl(0) in the weak acidic pH range, which transforms quickly into Al-c after aging. PACl, at high B values, maintains high speciation stability under the various conditions investigated. The ferron method provides a measure to explain the reactivity of different species with ferron. The classification of three kinds of aluminum hydrolysis species based on kinetic differences needs further modification. (C) 2004 Elsevier B.V. All rights reserved.

Type: Article
Title: Speciation stability of inorganic polymer flocculant-PACl
DOI: 10.1016/j.colsurfa.2004.04.073
Keywords: PACl, speciation stability, ferron method, coagulation, mechanism, NUCLEAR-MAGNETIC-RESONANCE, ALUMINUM(III) SOLUTIONS, HYDROLYZED ALUMINUM, COAGULATION, CHLORIDE, FERRON, IRON(III), HYDROXIDE, SALTS, ION
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1332443
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item