Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Fluoride Removal from Aqueous Solutions using Industrial Waste Red Mud

산업폐기물인 적니를 이용한 불소 제거

  • 엄병환 (한경대학교 화학공학과) ;
  • 조성욱 (한경대학교 지역자원시스템공학과) ;
  • 강구 (한경대학교 해양과학기술연구센터) ;
  • 박성직 (한경대학교 지역자원시스템공학과)
  • Received : 2013.03.12
  • Accepted : 2013.04.25
  • Published : 2013.05.31
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Abstract

The present study was conducted to investigate the adsorption potential of red mud for fluoride removal. Different operation parameters such as the effect of contact time, initial concentration, pH, competing anions, seawater, adsorbent dose amount, and adsorbent mixture were studied. Nearly 3 hr was required to reach sorption equilibrium. Equilibrium sorption data were described well by Langmuir model and the maximum adsorption capacity of red mud was 5.28 mg/g. The fluoride adsorption at pH 3 was higher than in the pH range 5-9. The presence of anions such as sulfate, nitrate, phosphate, and bicarbonate had no significant effect on fluoride adsorption onto red mud. The fluoride removal by red mud was greater in seawater than deionized water, resulting from the presence of calcium and magnesium ion in seawater. The use of red mud alone was more effective for the removal of fluoride than mixing red mud with other industrial waste such as oyster shells, lime stone, and steel slag. This study showed that red mud has a potential application in the remediation of fluoride contaminated soil and groundwater.

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References

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  1. Applicability Assessment of Acid Treated Red Mud as Adsorbent Material for Removal of Six-valent Chromium from Seawater vol.55, pp.5, 2013, https://doi.org/10.5389/KSAE.2013.55.5.017