Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Adsorption Characteristics of Aqueous Phosphate Using Biochar Derived from Oak Tree

참나무 바이오차의 인산염 인(PO4-P) 흡착특성

  • Choi, Yong-Su (Department of Agricultural Environment, National Academy of Agricultural Science, Rural Development Administration) ;
  • Hong, Seung-Gil (Department of Agricultural Environment, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Sung-Chul (Bio Environmental Chemistry, College of Agriculture & Life sciences, Chungnam National University) ;
  • Shin, Joung-Du (Department of Agricultural Environment, National Academy of Agricultural Science, Rural Development Administration)
  • 최용수 (국립농업과학원 농업환경부) ;
  • 홍승길 (국립농업과학원 농업환경부) ;
  • 김성철 (충남대학교 농업생명과학대학 생물환경화학과) ;
  • 신중두 (국립농업과학원 농업환경부)
  • Received : 2015.08.26
  • Accepted : 2015.09.07
  • Published : 2015.09.30
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Abstract

Objective of this study was to investigate adsorption characteristics of $PO_4-P$ to biochar produced from oak tree in respective to reduce eutrophication from runoff water in the cropland. For adsorption experiment, input amount of biochar was varied from 4 to 20 g/L with 30 mg/L $PO_4-P$ solution. Adsorption amounts and removal rates of $PO_4-P$ was increased at 3 times in 4~14 g/L, and increased at 28.6% in 4~16 g/L, respectively. The maximum adsorption amount ($q_m$) and binding strength constant(b) were calculated as 0.10 mg/g and 0.06 L/mg, respectively. The sorption of $PO_4-P$ to biochar was fitted well by Langmuir model because it was observed that dimensionless constant($R_L$) was 0.37. It was indicated that biochar is favorably adsorbed $PO_4-P$ because this value lie within 0 < $R_L$ < 1. Therefore, biochar produced from oak tree could be used as adsorbent for reduce eutrophication from runoff water in the cropland.

본 연구의 목적은 농경지에서 유출되는 유거수로부터 부영양화를 감소시키기 위하여 참나무를 원료로 제조한 바이오차의 인산염 인($PO_4-P$) 흡착특성을 구명하는 것이었다. 30 mg/L $PO_4-P$ 용액에 참나무 바이오차 투입량을 4~20 g/L로 변화시키는 조건으로 실험을 수행하였다. $PO_4-P$의 흡착량은 4~14 g/L 범위에서 3배 증가하였고, 제거율은 4~16 g/L 범위에서 28.6% 증가하였다. 최대 단분자층 흡착능($q_m$)과 결합세기(b)는 각각 0.10 mg/g, 0.06 L/mg으로 산출되었다. 또한 Langmuir 흡착등온식의 특징인 무차원상수($R_L$)는 0.37로 0과 1사이로 나타나 Langmuir 흡착등온식을 잘 표현하여 흡착에 용이함을 알 수 있었다. 따라서, 참나무를 원료로 제조한 바이오차는 농경지 유거수로부터 부영양화를 감소시키기 위한 $PO_4-P$ 흡착제로 용이하다고 판단된다.

Keywords

References

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