Industrial products and wastes as adsorbents for sulphate and chloride removal from synthetic alkaline solution and mine process water

Evgenia Iakovleva, Ermei Mäkilä, Jarno Salonen, Maciej Sitarz, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Two limestones and two solid wastes were tested as adsorbents for chloride and sulphate ion removal from synthetic and real alkaline process mining water. The composition and surface structure of the adsorbents were analysed by ED-XRF, XRD, SEM and MIR spectroscopy and the nitrogen adsorption method. The optimal adsorption time and amount of adsorbent were determined by batch analysis with an anion concentration of 20mg/L. In synthetic solution adsorbents removed 99% of SO42- and 96% of Cl- and in real process water the removal rate was 85% and 74% for SO42- and Cl-, respectively. It was found that equilibrium could successfully be fitted to the Langmuir, Toth and BiLangmuir adsorption isotherms.

Original languageEnglish
Pages (from-to)364-371
Number of pages8
JournalChemical Engineering Journal
Volume259
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • Adsorption
  • Chloride and sulphate ions removal
  • Mining process water treatment

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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