Precipitate coflotation of orthophosphate and fluoride

Dibakar Bhattacharyya, John D. Romans, Robert B. Grieves

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3 Scopus citations


Orthophosphate and fluoride are simultaneously precipitated from aqueous solution, 5.26 × 10−3 M. in each, by La (III). The precipitates are cofloated by the anionic surfactant sodium laurylsulfate, with optimum flotation at pH 4.0 and a stoichiometric lanthanum concentration based on LaPO4 and LaF3. Over pH 3.5 to 6.0, better than 95% flotation of the total orthophosphate and precipitated fluoride that‐are present can be floated at a molar sodium laurylsulfate to orthophosphate plus fluoride ratio of 0.023. At lower sodium laurylsulfate concentrations, the flotation decreases at pH 3.5 and 6.0 compared to pH 4.0–5.0; at pH 4.0, an increase in the La(III) concentration decreases the flotation.

Original languageEnglish
Pages (from-to)1024-1029
Number of pages6
JournalAICHE Journal
Issue number5
StatePublished - Sep 1972

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering (all)


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