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Improved Removal of Cr(VI) using Fe 3 O 4 /C Magnetic Nanocomposites Derived from Potassium Fulvic Acid
Author(s) -
Su Qiaohong,
Lin Zhang,
Tian Chen,
Su Xintai,
Xue Xiaogang,
Su Zhi
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903972
Subject(s) - nanocomposite , adsorption , calcination , hydrolysis , aqueous solution , materials science , nuclear chemistry , nanomaterials , chemical engineering , potassium , chemistry , nanotechnology , catalysis , organic chemistry , metallurgy , engineering
The development of high performance magnetic nanomaterials has a good application prospect in wastewater treatment. Herein, Fe 3 O 4 /C nanocomposites was synthesized by eco‐friendly hydrolysis‐calcination method using potassium fulvic acid (FA−K) and FeCl 3 ⋅6H 2 O as raw materials. The morphology of Fe 3 O 4 /C nanocomposites exhibited a loose pore structure with uniform size (a diameter ∼ 27 nm). The prepared Fe 3 O 4 /C nanocomposites possessed excellent dispersibility and magnetic properties in aqueous solution. The removal efficiency and maximum adsorption capacity of Fe 3 O 4 /C nanocomposites were 98% and 64.0 mg g −1 , respectively. Moreover, it was confirmed that the adsorption mechanism of Cr(VI) contains electrostatic attraction and redox reaction. In this work, we provide a convenient means for manufacturing Fe 3 O 4 /C nanocomposites, and prove that FA−K is a cheap carbon source for manufacturing Fe 3 O 4 /C nanocomposites, which makes Fe 3 O 4 /C nanocomposites have potential application value in the effective adsorption of Cr(VI).