Electrocoagulation: a new approach for the removal of boron containing wastes

Y. Xu, JiaQian Jiang, K. Quill, J. Simon, K. Shettle

Research output: Contribution to journalArticle

Abstract

Using electrocoagulation (EC) as a new method to treat boron containing effluent/wastes has been studied. With combined mechanisms of adsorption and precipitation, the EC is very effective to remove boron; 82% of boron from model waters ([B]0 = 250–500 mgL!1) can be removed at a current density of 62.1 Am!2 (equivalent to 3.3 as molar ratio of Al:B). In the treatment of industrial effluents, the EC can effectively remove boron and arsenic simultaneously, the [As] was reduced from 15 to 99.9%, i.e., after the fifth stage EC treatment, boron concentration can be decreased from 500 mgL!1 to less than 0.5 mgL!1. Chemical adsorption with freshly formed Al(OH)3 flocs played a dominant role in the removal of boron from the wastes. Pre-pH adjustment was not necessary with the EC in the treating of low pH wastes, whilst all other technologies need to raise the solution pH to neutral status.

Original languageEnglish
Pages (from-to)131-138
Number of pages8
JournalDesalination and Water Treatment
Volume2
Issue number1-3
Publication statusPublished - 1 Jan 2009

Keywords

  • wastewater
  • adsorption
  • electrocoagulation
  • boron removal

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