期刊
RESEARCH ON CHEMICAL INTERMEDIATES
卷 46, 期 10, 页码 4509-4527出版社
SPRINGER
DOI: 10.1007/s11164-020-04217-5
关键词
Fe3O4; graphene oxide; Hg(II); Adsorptive removal; Adsorption mechanism; Recyclable
资金
- project for opening and sharing of large instruments for detection, promotion and innovation of Inner Mongolia Autonomous Region, China [0406031901]
- scientific and technological innovation leading project of Inner Mongolia Autonomous Region, China [0406041801]
Decontamination of aqueous heavy metal is a challenging task of environmental remediation. Herein, we demonstrated an adsorptive method for efficient removal of aqueous Hg(II) using a magnetic nanocomposite Fe3O4/graphene oxide (Fe3O4/GO). Adsorption of Hg(II) onto Fe3O4/GO equilibrated in 4 min, with the adsorption percent and quantity of 91.17% and 547.01 mg g(-1), respectively. Fe3O4/GO can be easily recovered from solution via magnetic separation for reuse, and retaining 73.5% of its original capacity after five consecutive cycles. The Temkin model and PSO model were most suitable for describing adsorption in equilibrium and non-equilibrium state, respectively. Both GO and Fe(3)O(4)adsorbed Hg(II) via donating electrons in oxygen atoms toward Hg(II). Moreover, GO made a major contribution, while Fe(3)O(4)made a minor one to adsorption. The facile preparation, high adsorption efficiency, easy recovery, and reusability may enable Fe3O4/GO to be a promising adsorbent for aqueous Hg(II).
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