콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Needle-like iron oxide@CaCO3 adsorbents for ultrafast removal of anionic and cationic heavy metal ions
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2016-08
- 저자명 Md. Shahinul Islam, Won San Choi*, Bora Nam, Cheolho Yoon, and Ha-Jin Lee
- 학술지명 Chem. Eng. J.
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.cej.2016.08.079
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
A carbonate-based mesoporous magnetic adsorbent IO@CaCO3 was synthesized via a hydrothermal method. The IO@CaCO3 adsorbent removed both anionic (As(V) and Cr(VI)) and cationic (Pb(II)) heavy metal ions at a rate orders of magnitude faster than any conventional adsorbents reported to date; due to synergistic effect of needle-like IO and CaCO3, it completely removed (99.99%) the toxic heavy metal ions from wastewater in only 9 min. In addition, it exhibited excellent As(V), Cr(VI), and Pb(II) removal capacities of 184.1, 251.6, and 1041.9 mg g−1, respectively, over a wide pH range. The heavy metal ion adsorption mechanism involves ion-exchange reactions between the cationic/anionic heavy metal ions and the positively/negatively charged groups on the adsorbent. Along with the batch adsorption tests, heavy metal ion removal by IO@CaCO3 was also performed by column filtration, demonstrating the potential of IO@CaCO3 for use in practical applications. Moreover, the excellent removal efficiencies of the adsorbent for the heavy metal ions up to drinking water level and its easy separation by an external magnetic field enabled it to be effectively reused.
