Mercury removal from water streams through the ion exchange membrane bioreactor concept

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Abstract

Mercury is a highly toxic heavy metal that causes human health problems and environmental contamination. In this study, an ion exchange membrane bioreactor (IEMB) process was developed to achieve Hg(II) removal from drinking water and industrial effluents. Hg(II) transport through a cation exchange membrane was coupled with its bioreduction to Hg0 in order to achieve Hg removal from concentrated streams, with minimal production of contaminated by-products observed. This study involves (1) membrane selection, (2) demonstration of process effectiveness for removing Hg from drinking water to below the 1ppb recommended limit, and (3) process application for treatment of concentrated water streams, where >98% of the Hg was removed, and the throughput of contaminated water was optimised through membrane pre-treatment. The IEMB process represents a novel mercury treatment technology with minimal generation of contaminated waste, thereby reducing the overall environmental impact of the process.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalJournal of Hazardous Materials
Volume264
DOIs
Publication statusPublished - 15 Jan 2014

Keywords

  • Donnan dialysis
  • Ion exchange membrane bioreactor (IEMB)
  • Mercury bioremediation
  • Mixed microbial cultures
  • Water treatment

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