Preparation and characterisation of an optimal polyferric sulphate (PFS) as a coagulant for water treatment

Jia-Qian Jiang, Nigel J.D. Graham*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

72 Citations (Scopus)

Abstract

A range of effective optimal formulations of polyferric sulphate (PFS) can be prepared by a novel procedure, recently developed by the authors, involving an oxidation stage followed by a partial hydrolysis (aging) stage. The Fe(III) concentrations, the dose and nature of the base used, and the temperature and time of partial hydrolysis influence the properties of the resulting PFS formulations and these have been carefully studied. The analytical techniques of membrane ultrafiltration, ferron-timed spectroscopy and specific electrophoretic mobility have been used to characterise the nature of the PFS species. The optimal PFS coagulating species have been found to have medium molecular weight (0.5-10 kDa) and high cationic charge. Such optimal species are believed to be responsible for the superior performance of PFS in water treatment practice.

Original languageEnglish
Pages (from-to)351-358
Number of pages8
JournalJournal of Chemical Technology and Biotechnology
Volume73
Issue number4
DOIs
Publication statusPublished - Dec 1998
Externally publishedYes

Keywords

  • polyferric sulphate
  • PFS
  • coagulation
  • coagulant
  • water treatment
  • cationic species
  • oxidation
  • partial hydrolysis

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Inorganic Chemistry

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