Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Adsorption and Removal Mechanism of Dissolved Inorganic Nutrients in Seawater by Yellow Loess

황토살포에 의한 해수중 영양염류의 흡착제거기구

  • Kim Pyoung Joong (Department of Oceanography Marine Environment National Fisheries Research & Development Institute) ;
  • Heo Seung (Department of Oceanography Marine Environment National Fisheries Research & Development Institute) ;
  • Yun Seong Jong (Department of Oceanography Marine Environment National Fisheries Research & Development Institute)
  • 김평중 (국립수산진흥원 해양환경부) ;
  • 허승 (국립수산진흥원 해양환경부) ;
  • 윤성종 (국립수산진흥원 해양환경부)
  • Published : 2002.03.01
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Abstract

To assess the adsorption and removal mechanism of dissolved inorganic nutrients in seawater by scattering yellow loess, a laboratory experiment was conducted for the change of nutrient concentration in seawater during the course of time depending on particle size and scattered concentration of the yellow loess. Twenty four hours after the addition of yellow loess in the size range of 0 $\mu$m to 500 $\mu$m in seawater, the removal rate of dissolved inorganic phosphorus (DIP) was increased with increasing amount of yellow loess. There was little difference among the removal rates depending on the size of yellow loess. On average, $26\%$ of dissolved inorganic silicate was reduced for the same period. No greate difference among the removal rate depending on both size and amount of yellow loess was found. Our results suggested that the removal mechanism of DU seemed to be associated with mostly the chemical bond with iron. More than $99\%$ of initial DU concentration was likely to be removed by this mechanism. In the case of inorganic dissolved silicate, the removal mechanism was likely to be attributed to a cation exchange between the yellow loess and seawater.

황토살포에 따른 해수중 영양염 제거효율 및 제거기구를 파악하기 위하여 황토의 입자 크기와 살포농도에 따른 경과시간별 해수중 영양염 농도변화를 실내 실험을 통하여 측정하였다 53$\mu$m 이하에서 500$\mu$m 크기범위의 황토입자를 해수중에 첨가하여 24시간이 경과 후, 인산인의 제거효율은 황토 살포농도에 따라 59$\~$$99\%$까지 변하였으며, 살포농도가 증가할수록 제거효율은 높게 나타났다. 그러나, 황토 입자크기에 따른 인산인의 제거효율의 차는 그다지 크지 않았다 규산규소의 제거효율은 황토입자 크기 및 살포 양의 차이에 관계없이 평균 약 $26\%$가 일정하게 감소하였다. 해수중 황토 살포 후, 인산인의 제거기구를 파악하기 위한 인의 존재형태별 분석결과는 $99\%$ 이상의 인산인이 철성분에 의한 화학적인 결합에 의해 제거된다는 것을 나타내었고, 규산규소는 해수와 황토 내에 들어있는 양이온과의 이온교환에 의하여 제거되는 것을 시사해 주었다

Keywords

References

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  1. Effects of Yellow Clay on the Production of Volatile Fatty Acids during the Anaerobic Decomposition of the Red Tide Dinoflagellate Cochlodinium polykrikoides in Marine Sediments vol.45, pp.5, 2012, https://doi.org/10.5657/KFAS.2012.0472
  2. 연안어장 준설퇴적물에 대한 질산염과 인산염의 흡착 vol.36, pp.6, 2012, https://doi.org/10.5394/kinpr.2012.36.6.459