논문 상세보기

저질이 천연수중 구리와 카드뮴의 화학종 분포에 미치는 영향 KCI 등재

Influence of Sediment on the Chemical Speciation of Copper and Cadmium in an Aquatic System

  • 언어KOR
  • URLhttps://db.koreascholar.com/Article/Detail/369491
서비스가 종료되어 열람이 제한될 수 있습니다.
한국환경과학회지 (Journal of Environmental Science International)
한국환경과학회 (The Korean Environmental Sciences Society)
초록

In order to predict the distribution of chemical species of copper and cadmium in water, conditional stability constant and complexation capacity between copper or cadmium and natural aquatic sediment have been determined in a shallow lake in Haman, Kyungnam. Kinetic parameters were calculated by Langmuir isotherm equation. Conditional stability constant was log K_cdses=4.78 and log K_cdsed=4.45. Complexation capacity was 1.70×10 exp (-4) moles/g for copper and 5.54×10 exp (-4) moles/g for cadmium. Accuracy of experimental values of conditional stability constant was checked by comparing the calculated concentration of the metals with the measured one. Relatively good agreement between these values was obtained. Relative errors were 8.9% for copper and 6.5% for cadmium. Data of the measured conditional stability constant were put into data base of MINEQL computer program, and concentration of various chemical species of copper and cadmium in a model aquatic system was calculated. Aquatic sediment was associated with copper at the concentration of 10^-5M(0.059g/ℓ) and with cadmium at the concentration of 10^-6M(0.018g/ℓ), and it significantly influenced on the distribution of chemical species of the metals. This result showed that prediction of chemical species of the heavy metals in an aquatic system should be taken into account the influence of the sediment.

저자
  • 이군자 | Goon Ja Lee
  • 박청길 | Chung Kil Park