Recovery of phosphorus from natural water bodies using iron-oxidizing bacteria and woody biomass

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13 Citations (Scopus)

Abstract

There is a global concern that phosphorus (P) resources will be depleted in the near future, but the P flux from water to land is extremely limited, whereas the reverse flux is substantial. A new method for the recovery of P from natural water bodies was proposed using iron-oxidizing bacteria and woody biomass (heartwood of conifer) as a carrier and a practical demonstration was presented. The woody carrier was immersed in water abundant in iron-oxidizing bacteria and removed 1-10 weeks later. Our results showed that the immersed carrier collected biogenic iron (Fe) oxides produced by iron-oxidizing bacteria, and contained about 0.2 mg g-1 of P after 3 weeks; this amount was higher than that contained in some P fertile soils used for cultivating plants. The biogenic Fe oxides on the carrier acted as a source of P for plant cultivation, and they could adsorb P from P-rich solutions (10 mg L-1 of PO4-P). Although our study involved only a small-scale trial, the proposed method can potentially aid in the effective use of P in water and in water quality improvement if conducted on a large scale.

Original languageEnglish
Pages (from-to)1064-1069
Number of pages6
JournalEcological Engineering
Volume36
Issue number8
DOIs
Publication statusPublished - Aug 2010

Keywords

  • Adsorbent
  • Iron-oxidizing bacteria
  • Phosphorus recovery
  • Plant nutrition
  • Woody biomass

ASJC Scopus subject areas

  • Environmental Engineering
  • Nature and Landscape Conservation
  • Management, Monitoring, Policy and Law

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