Effects of Limestone on the Dissolution of Phosphate from Sediments under Anaerobic Condition

혐기성 퇴적물에서 석회석이 인산염용해에 미치는 영향

  • Kim, Hag Seong (Department of Environmental Engineering, Chungbuk National University) ;
  • Park, Juhyun (Department of Environmental Engineering, Chungbuk National University)
  • 김학성 (충북대학교 환경공학과) ;
  • 박주현 (충북대학교 환경공학과)
  • Received : 2006.10.17
  • Accepted : 2006.11.28
  • Published : 2007.01.30

Abstract

This paper describes a study on the role of limestone which might affect the dissolution of phosphates when phosphate containing sediments are put under anaerobic conditions. A small quantity of calcium hydroxy-apatite, alone or mixed with limestone powder, was put in contact with aqueous solution of acetic acid or carbonic acid, and variations of phosphate concentration were determined time dependantly. The results showed that the concentration was remarkably low in the presence of limestone, signifying that the coexistence of limestone suppresses the dissolution of phosphate by organic acid and/or carbonic acid. Separate experiments conducted by developing an anaerobic condition, after mixing lake sediments with dried leaves and limestone, showed that the existence of limestone suppressed the dissolution of phosphate. These results show that the application of limestone might be a useful measure to prevent deterioration of water quality originated from eutrophication by inhibiting the internal loading of P in eutrophic water-bodies.

Keywords

Acknowledgement

Supported by : 충북대학교

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