Effects of Mn(II) and Fe(II) on microbial removal of arsenic (III)

Reena Amatya Shrestha, Bimala Lama, Jarina Joshi, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Goal, scope, and background: Arsenic contamination in groundwater creates severe health problems in the world. There are many physiochemical and biological methods available for remediation of arsenic from groundwater. Among them, microbial remediation could be taken as one of the least expensive methods, though it takes longer treatment time. The main objective of this research was to study the improvement on remediation by addition of some essential ion salts such as Mn and Fe. Materials and methods: Staphylococcus aureus, Bacillus subtilis, Klebsiella oxytoca, and Escherichia coli were taken as model microbes from Dhulikhel, 30 km east from Kathmandu, Nepal. Results and discussion: Microbes used in this study showed different abilities in their removal of As(III) with and without addition of Mn and Fe salts. The trend of remediation increased with time. S. aureus was found to be the best among the microbes used. It showed almost 100% removal after 48-h culture, both with and without Fe and Mn salts. Rate of removal of As increased with addition of Fe and Mn for all microbes. Removal efficiency was found to increase by about 32% on average after addition of salts in 24-h cultures of S. aureus.

Original languageEnglish
Pages (from-to)303-307
Number of pages5
JournalEnvironmental Science and Pollution Research
Issue number4
Publication statusPublished - Jun 2008
Externally publishedYes


  • Arsenic (III)
  • Bacillus subtilis
  • Bioremediation
  • E. coli
  • Klebsiella oxytoca
  • Microbial removal
  • Mn and Fe salts
  • S. aureus

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis


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