본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Journal of colloid and interface science v.512, 2018년, pp.115 - 126   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Synthesis of magnetite derivatives nanoparticles and their application for the removal of chromium (VI) from aqueous solutions

Tahar, Lotfi Ben    (Northern Border University, Faculty of Science of Arar, P.O. Box 1231, Arar 91431, Saudi Arabia   ); Oueslati, Mohamed Habid    (Northern Border University, Faculty of Science of Arar, P.O. Box 1231, Arar 91431, Saudi Arabia   ); Abualreish, Mustafa Jaipallah Abdelmageed    (Northern Border University, Faculty of Science of Arar, P.O. Box 1231, Arar 91431, Saudi Arabia  );
  • 초록  

    Abstract Nowadays there is a continuously increasing worldwide concern for the development of efficient wastewaters treatment technologies. Among the heavy metal ions, chromium holds a distinct position due to its high toxic nature to biological systems. This study aims to assess magnetite derivatives nanoparticles for the removal of Cr(VI) species. Crystalline magnetite-rich ( Magn ) and pure maghemite ( Magh ) nanoparticles were produced by the polyol method and by subsequent heat treatment of Magn , respectively. The XRD analysis confirmed the formation of nanosized single phase cubic spinels with a cell parameter of 8.3710(2)A for Magn and 8.3401(2)A for Magh , consistent with those of a magnetite-rich ferrite and maghemite, respectively. TEM analysis showed that the two nanoferrites possessed comparable mean particle size of ∼15nm. Magn and Magh showed superparamagnetic behavior at room temperature and reasonable saturation magnetizations at 300K of 69 and 67emu.g −1 , respectively. The Curie temperature of both nanoferrites exceeded 350°C allowing the materials to work in severe conditions. Room temperature, batch adsorption experiments of Cr(VI) onto maghemite nanoparticles were carried out at pH 2.0. Adsorption efficiency increased rapidly was the increase of the nanoparticles dose. For a 20mg.L −1 Cr(VI) solution a 100% removal was found with ∼3g.L −1 dose. Additionally, for a given dose (4.0g.L −1 ), the adsorption rate measured as a function of time for different Cr(VI) concentrations was very rapid; ∼90% of removable Cr(VI) species was achieved within 10min. The high rate of Cr(VI) uptake takes advantages of the high active surface chemistry of the nanoparticles. The adsorption of Cr(VI) onto Magh nanoparticles followed a pseudo-second order kinetics indicating a chemisorption process. Further, the Langmuir isotherm model was found to best describe the equilibrium data with a maximum adsorption capacity of 12.5mg.g −1 for an adsorbent dosage of 4.0g.L −1 . Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Nanoparticles .   Magnetite .   Maghemite .   Magnetism .   Adsorption .   Chromium.  

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기