대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제35권2호
  • /
  • Pages.131-136
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  • 2013
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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고온 처리된 납석을 흡착제로 이용한 용액상의 불소 제거

Fluoride Removal from Aqueous Solution Using Thermally Treated Pyrophyllite as Adsorbent

  • 김재현 (서울대학교 환경기능성물질 및 바이오콜로이드연구실) ;
  • 송양민 (가천대학교 보건과학부) ;
  • 김성배 (서울대학교 환경기능성물질 및 바이오콜로이드연구실)
  • Kim, Jae-Hyun (Environmental Functional Materials & Biocolloids Labo) ;
  • Song, Yang-Min (Department of Global Healthcare Management, Gachon University) ;
  • Kim, Song-Bae (Environmental Functional Materials & Biocolloids Labo)
  • 투고 : 2012.08.29
  • 심사 : 2013.02.18
  • 발행 : 2013.03.30
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초록

본 연구의 목적은 고온 처리된 납석을 흡착제로 이용하여 불소 제거를 연구하는 것이었다. 본 연구에서는 흡착제양, 반응시간, 초기불소농도 그리고 용액pH가 불소제거에 미치는 영향을 관찰하기 위하여 회분조건에서 흡착실험을 수행하였다. 실험에는 다양한 온도에서 열처리한 납석[무처리 (P-U), $400^{\circ}C$ (P-400), $600^{\circ}C$ (P-600)]을 사용하였다. 실험결과, 불소흡착능은 P-400 > P-U > P-600 순으로 나타났다. XRD 분석결과, P-U와 P-400은 석영, 디카이트, 엽납석으로 구성된 반면, P-600은 석영으로만 구성된 것으로 나타났다. BET 분석결과, 비표면적은 P-600 > P-400 > P-U 순으로 나타났다. 동역학적 실험결과, P-400에서의 불소흡착은 24시간 이내에 평형에 도달하였다. 평형흡착 실험결과, P-400의 최대 불소흡착능은 0.957 mg/g이었다. 또한, P-400에 의한 불소제거는 pH 4-10범위에서 용액 pH의 영향을 받지 않았지만, 강산성(pH < 4)과 강염기성(pH > 10) 조건에서는 불소제거가 크게 감소하였다. 본 연구에 의하면, 납석은 저가 흡착제로써 수용액상의 불소제거에 이용될 수 있을 것으로 판단된다.

The aim of this study was to investigate the removal of fluoride using thermally treated pyrophyllite as adsorbent. Sorption experiments were conducted under batch conditions to examine the effects of adsorbent dose, reaction time, initial fluoride concentration and solution pH on fluoride removal. In the experiments, the pyrophyllite thermally treated at different temperatures [untreated (P-U), $400^{\circ}C$ (P-400), $600^{\circ}C$ (P-600)] were used. Results showed that the adsorption capacity was in the order of P-400 > P-U > P-600. The XRD analysis indicated that both P-U and P-400 were composed of quartz, dickite and pyrophyllite while P-600 was quartz. The BET analysis showed that the specific surface area was in the order of P-600 > P-400 > P-U. Kinetic data showed that fluoride sorption to P-400 arrived at equilibrium around 24 h. Equilibrium test demonstrated that the maximum sorption capacity of P-400 was 0.957 mg/g. In addition, fluoride removal by P-400 was not sensitive to solution pH between 4 and 10. However, fluoride removal decreased considerably at highly acidic (pH < 4) and alkaline (pH > 10) conditions. This study demonstrates that pyrophyllite could be used as a low-cost adsorbent for fluoride removal from aqueous solution.

키워드

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피인용 문헌

  1. Influence of Acid and Heat Treatment on the Removal of Fluoride by Red Mud vol.37, pp.4, 2015, https://doi.org/10.4491/KSEE.2015.37.4.210
  2. The Characterization of Pyrophyllite Based Ceramic Reactive Media for Permeable Reactive Barriers vol.31, pp.4, 2018, https://doi.org/10.9727/jmsk.2018.31.4.227