Next Article in Journal
Application of Light Metal Alloy EN AW 6063 to Vehicle Frame Construction with an Innovated Steering Mechanism
Next Article in Special Issue
Biochars from Lignin-rich Residue of Furfural Manufacturing Process for Heavy Metal Ions Remediation
Previous Article in Journal
Residual Compressive Strength of Short Tubular Steel Columns with Artificially Fabricated Local Corrosion Damage
Previous Article in Special Issue
Oxytree Pruned Biomass Torrefaction: Mathematical Models of the Influence of Temperature and Residence Time on Fuel Properties Improvement
Open AccessArticle

Synthesis of Fe/Mg-Biochar Nanocomposites for Phosphate Removal

by Xuefeng Tao 1,2,*, Tao Huang 1 and Bo Lv 2
1
Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China
2
Chongqing Municipal Research Institute of Design, Chongqing 400020, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(4), 816; https://doi.org/10.3390/ma13040816
Received: 6 December 2019 / Revised: 5 February 2020 / Accepted: 7 February 2020 / Published: 11 February 2020
(This article belongs to the Collection Advanced Biomass-Derived Carbon Materials)
Magnetic biochar derived from agricultural biomass has been recognized as a cost-effective biochar sorbent for phosphate removal. This study evaluated the use of novel Fe/Mg-biochar nanocomposites (WBC1x), prepared by impregnating ground walnut shell in a solution with a different molar ratio of Fe2+ to Mg2+, then pyrolyzing slowly, at a temperature of 600 °C, to remove phosphate. The results showed that MgO and Fe3O4 were loaded onto the biochar successfully through the impregnation-pyrolysis method and the composites were able to be separated easily by magnetic field. Meanwhile, a higher surface area and point of zero charge on WBC1x were observed compared to the non-magnetic biochar (WBC). Moreover, the isothermal adsorption and kinetics data further suggested the that phosphate adsorption onto WBC1x resulted from chemisorption. Additionally, the maximum phosphate adsorption capacity of WBC1x was 6.9 mg.g−1, obtained though the Langmuir–Freundlich model, which was threefold higher than WBC, where MgO addition could enhance the adsorption capacity of WBC1x markedly by improving the surface charge. View Full-Text
Keywords: Fe/Mg-biochar nanocomposites; phosphate removal; biochar Fe/Mg-biochar nanocomposites; phosphate removal; biochar
Show Figures

Figure 1

MDPI and ACS Style

Tao, X.; Huang, T.; Lv, B. Synthesis of Fe/Mg-Biochar Nanocomposites for Phosphate Removal. Materials 2020, 13, 816.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop