Journal
BIOCHAR
Volume 2, Issue 4, Pages 455-464Publisher
SPRINGER SINGAPORE PTE LTD
DOI: 10.1007/s42773-020-00066-y
Keywords
Layered double hydroxide (LDH); Biochar; Atrazine; Adsorption
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Funding
- MOA Modern Agricultural Talents Support Project
- Plan for Training Talents with Special Funds for the Development of Local Colleges and Universities by Central Finance
- National Natural Science Foundation of China [31972941]
- Central Committee Guides Local Science and Technology Development Projects, Heilongjiang Provincial Key Laboratory of Soil Protection and Remediation [ZY18A05]
- Second Batch of the National 10,000 Person Plan in 2016
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This study assembled corn stalk-derived biochar (BC) with layered double hydroxide (LDH) through a rapid coprecipitation of biochar and metal (Ni/Fe/Zn) hydroxide precipitates. A BC and LDH composite (BC-LDH) and modified BC-LDH material after heating (BC-LDH-P) were prepared successfully for atrazine adsorptive removal. The physicochemical properties of the synthesized samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS). Batch experiments were conducted to study the sorption of atrazine onto BC, BC-LDH, and BC-LDH-P from the aqueous solution. The adsorption of atrazine onto BC-LDH and BC-LDH-P were performed following with the pseudo-second-order kinetic model, and the sorption isotherms agreed well with the Freundlich fitting model. The adsorption amounts of the three materials are arranged in descending order is as follows: BC-LDH-P>BC-LDH>BC (143.15>123.10>95.93 mg g(-1), respectively). Due to the high crystallinity of the LDH material and the high binding degree with biochar, Ni/Fe/Zn-LDH biochar composites offer a potential alternative to a carbon-based adsorbent for atrazine removal from aqueous solution.
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