Pre-polymerised inorganic coagulants and phosphorus removal by coagulation: a review

Jia Qian Jiang, Nigel J.D. Graham*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

192 Citations (Scopus)


This paper reviews the use of pre-polymerised inorganic coagulants in water and waste-water treatment, and discusses the removal of phosphorus by chemical precipitation and coagulation. Commonly used inorganic coagulants are aluminium or iron (III) based salts, but a range of hydrolysed Al/Fe species, and not the Al/Fe salt itself, are responsible for the removal of impurities from water. By the development and use of polymeric inorganic coagulants, the coagulation performance can be improved significantly in some cases. Chemical precipitation and coagulation in phosphorus removal are two different processes, with the former related to the compound solubility and the latter depending on the destabilisation-adsorption mechanism. Presently, there is uncertainty concerning the mechanisms and overall performance of phosphorus removal by pre-polymerised metal coagulants.

Original languageEnglish
Pages (from-to)237-244
Number of pages8
JournalWater SA
Issue number3
Publication statusPublished - Jul 1998
Externally publishedYes

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Water Science and Technology
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law


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