Abstract
The excellent hierarchical porous carbon was fabricated from corn straw–derived hydrochar by chemical activation using potassium oxalate (K2C2O4). SEM, BET, XPS, XRD, and Raman analysis were carried out for the characterization of the as-obtained samples. The morphology of the as-obtained porous carbon with hierarchical porous structures is made up of a large number of nano-particle aggregates and some nanosheet-like structures, possessing a super-large specific surface area (SSA, up to 2523 m2 g−1) with a large total pore volume of 1.464 cm3 g−1. The as-fabricated carbon material rapidly removes atrazine in the first 3 h at the initial concentration of 20 mg L−1 with an adsorption efficiency of 93.6%, which is faster and better than other representative materials reported previously. The acidic conditions are favorable for the atrazine adsorption onto the porous carbon. An efficient adsorbent was fabricated for environmental remediation, and in-depth insights into the interface mechanism between hierarchical porous carbon and atrazine are proposed. In addition, 95% of the adsorption capacity of MPC-1:3 can be recovered by simple annealing treatment.
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Funding
This research was supported by the National Key R & D Project (2016YFD0800201), the special project to guide the development of local science and technology by the central government (ZY18A05), the National Natural Science Fund for Distinguished Young Scholars (41625002), the Second Batch of National “10,000 Person Plan” in 2016, the MOA Modern Agricultural Talents Support Project, Application Technology Research and Development Projects of Harbin (2016RAXXJ103), the National Key R & D Project (2017YFD0801103), and Heilongjiang Provincial Key Laboratory of Soil Protection and Remediation.
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Jiang, Q., Wang, Y., Gao, Y. et al. Fabrication and characterization of a hierarchical porous carbon from corn straw–derived hydrochar for atrazine removal: efficiency and interface mechanisms. Environ Sci Pollut Res 26, 30268–30278 (2019). https://doi.org/10.1007/s11356-019-06174-y
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DOI: https://doi.org/10.1007/s11356-019-06174-y