한국폐기물자원순환학회지 제35권 제3호 (p.236-242)

벚나무 탄화물을 이용한 합성폐수 내 아연 이온의 흡착 특성

Adsorption Characteristics of Zinc Ion in Synthetic Wastewater by Carbonaceous Material Prepared from Oriental Cherry
키워드 :
Adsorption,Carbonaceous material,Oriental cherry,pH,Temperature

목차

Abstract
I. 서 론
II. 연구방법
  1. 실험 재료 및 방법
  2. 분석 방법
III. 결과 및 고찰
  1. 벚나무 탄화물의 성분 및 특성
  2. 흡착제 투여량에 따른 제거효율
  3. pH에 따른 제거효율
  4. 온도에 따른 제거효율
  5. 교반강도와 반응시간에 따른 제거효율
  6. 등온흡착식
IV. 결 론
References

초록

Carbonaceous material prepared from oriental cherry can be used for the adsorption of zinc ion from an aqueous solution. Parameters such as pH (4-11), temperature (293-333 K), mixing intensity (10-120 rpm) and contact time (0.5- 90 min) were studied. Increasing pH (99.6% at pH 11) and temperature (99.8% at 333 K) caused an increase in adsorption capacity. A pseudo-equilibrium state was reached within 1 min of contact time. Removal efficiency of zinc ion remained constant regardless of mixing intensity. The adsorption equilibrium data were best represented by the Freundlich adsorption isotherm. The calculated maximum adsorption capacity was 3.541 mg/g. Thermodynamic studies demonstrated that the adsorption process was spontaneous with Gibb’s free-energy values ranging between -3.272 and -15.594 kJ/mol and endothermic with an enthalpy value of 86.984 kJ/mol. Therefore, carbonaceous material from oriental cherry was shown to have good potential for the adsorption of zinc ion.