期刊
BIORESOURCE TECHNOLOGY
卷 293, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122100
关键词
Magnetic carbon nanotubes; Polyethyleneimine; Removal; Alizarin Red S
资金
- National Natural Science Foundation of China [31700862]
- Natural Science Foundation of Shanxi Province of China [201601D021098]
- Fund for Construction Program of Chemical Advantage and Key Discipline of Shanxi Province of China [912019]
- College student's innovation Fund of Shanxi Province [2018233]
Alizarin Red S (ARS) has been extensively used in the dyeing industry. In order to effectively remove the ARS form dyeing wastewater, polyethyleneimine (PEI)-functionalized magnetic carbon nanotubes (PEI@MCNTs) adsorbent was successfully prepared and its adsorption performances were also investigated in detail. The PEI@ MCNTs could efficiently remove the ARS from acidic aqueous solution (pH < 6.0) within 40 min under room temperature. Benefiting from a large number of adsorption sites and multiple interactions, PEI@MCNTs possessed high selectivity towards ARS with spontaneous adsorption process. The maximum adsorption capacity of PEI@MCNTs for ARS was 196.08 mg g(-1) obtained from Langmuir isotherm, higher than that of available conventional adsorbents. Moreover, the PEI@MCNTs could be easily collected by an external magnet, and then effectively regenerated through 10 mM NaOH solution. The prepared PEI@MCNTs could be considered as the promising adsorbent for the removal of anthraquinone dyes in large-scale wastewater treatment.
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