Simultaneous bio-reduction of nitrate, perchlorate, selenate, chromate, arsenate, and dibromochloropropane using a hydrogen-based membrane biofilm reactor

Jinwook Chung, Bruce Rittmann, William F. Wright, Reid H. Bowman

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

We tested the hypothesis that the H2-based membrane biofilm reactor (MBfR) is capable of reducing multiple oxidized contaminants, a common situation for groundwater contamination. We conducted bench-scale experiments with three groundwater samples collected from California's San Joaquin Valley and on two synthetic groundwaters containing selenate and chromate. The actual groundwater sources had nitrate levels exceeding 10 mg-N l-1 and different combinations of anthropogenic perchlorate + chlorate, arsenate, and dibromochloropropane (DBCP). For all actual groundwaters, the MBfR reduced nitrate to less than 0.01 mg-N l-1. Present in two groundwaters, perchlorate + chlorate was reduced to below the California Notification Level, 6 μg-ClO4 l-1. As(V) was substantially reduced to As(III) for two groundwaters samples, which had influent As(V) concentrations from 3 to 8.8 μg-As l-1. DBCP, present in one groundwater at 1.4 μg l-1, was reduced to below its detection limit of 0.01 μg l-1, which is well below California's 0.2 μg l-1 MCL for DBCP. For the synthetic groundwaters, two MBfRs initially reduced Se(VI) or Cr(VI) stably to Se° or Cr(III). When we switched the influent oxidized contaminants, the new oxidized contaminant was reduced immediately, and its reduction soon was approximately the same or greater than it had been reduced in its original MBfR. These results support that the H2-based MBfR can reduce multiple oxidized contaminants simultaneously.

Original languageEnglish (US)
Pages (from-to)199-209
Number of pages11
JournalBiodegradation
Volume18
Issue number2
DOIs
StatePublished - Apr 2007

Keywords

  • Arsenate
  • Bioreduction
  • Chromate, Dibromochloropropane
  • Hydrogen
  • Membrane biofilm reactor
  • Oxidized contaminants
  • Perchlorate
  • Selenate

ASJC Scopus subject areas

  • Environmental Engineering
  • Microbiology
  • Bioengineering
  • Environmental Chemistry
  • Pollution

Fingerprint

Dive into the research topics of 'Simultaneous bio-reduction of nitrate, perchlorate, selenate, chromate, arsenate, and dibromochloropropane using a hydrogen-based membrane biofilm reactor'. Together they form a unique fingerprint.

Cite this