Inhibition of anaerobic ammonium oxidation by heavy metals

Guangbin Li, Daniel Puyol, Jose Maria Carvajal-Arroyo, Maria Reye Sierra Alvarez, James A Field

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Anaerobic ammonium oxidation (anammox) is a promising approach for removing nitrogen from landfill leachates and other nitrogen-laden wastewater. Although heavy metals, which are known for their microbial toxicity, are commonly present in those wastewater streams information on their inhibitory impact on anammox activity is still limited. The main aim of this study is to investigate the inhibitory effects of six common metal ions (Cu2+, Cd2+, Ni2+, Zn2+, Pb2+, and molybdate) on anammox activity. RESULTS: The soluble concentrations of cationic metals decreased due to precipitation reactions. Cu, Zn, Cd, and Ni were the most toxic metals with 50% inhibiting soluble concentrations of 4.2, 7.6, 11.2, and 48.6mgL-1, respectively. Molybdate and Pb2+ were not or only moderately inhibitory at the highest soluble concentrations tested (22.7mg Mo L-1 and 6.0mg Pb L-1, respectively). A noncompetitive inhibition model successfully described the relationship between microbial inhibition and metal concentrations for all tested metals except for Pb. CONCLUSION: Cu, Zn and Cd were the most toxic heavy metals for anammox bacteria. The soluble concentration of these heavy metals needs to be monitored carefully before applying anammox processes.

Original languageEnglish (US)
Pages (from-to)830-837
Number of pages8
JournalJournal of Chemical Technology and Biotechnology
Volume90
Issue number5
DOIs
StatePublished - May 1 2015

Fingerprint

Heavy Metals
Ammonium Compounds
Heavy metals
ammonium
Metals
heavy metal
oxidation
Oxidation
Poisons
metal
Waste Water
Wastewater
Nitrogen
Chemical Water Pollutants
wastewater
nitrogen
Land fill
Metal ions
Toxicity
Bacteria

Keywords

  • Anammox
  • Cadmium
  • Copper
  • Lead
  • Nickel
  • Zinc

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Biotechnology
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Pollution
  • Waste Management and Disposal
  • Inorganic Chemistry
  • Organic Chemistry

Cite this

Inhibition of anaerobic ammonium oxidation by heavy metals. / Li, Guangbin; Puyol, Daniel; Carvajal-Arroyo, Jose Maria; Sierra Alvarez, Maria Reye; Field, James A.

In: Journal of Chemical Technology and Biotechnology, Vol. 90, No. 5, 01.05.2015, p. 830-837.

Research output: Contribution to journalArticle

Li, Guangbin ; Puyol, Daniel ; Carvajal-Arroyo, Jose Maria ; Sierra Alvarez, Maria Reye ; Field, James A. / Inhibition of anaerobic ammonium oxidation by heavy metals. In: Journal of Chemical Technology and Biotechnology. 2015 ; Vol. 90, No. 5. pp. 830-837.
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