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ABSTRACT
In this paper, the dye sludge which was prepared from Congo red solution by flocculation method was further modified by catechol and 1, 6-hexanediamine before usage to remove Cr(VI) ions. This particles were characterized by multiple testing means and the effects of removal, such as contact time, pH value, initial concentration, and temperature, were studied by batch mode. The maximum adsorption capacity of Cr(VI) was 282.48 mg/g and the whole process was spontaneous and endothermic. Hopefully, with the advantages of facile preparation and high adsorption capacity, the dye-based adsorbent has broad application prospects in the field of wastewater treatment.
Additional information
Funding
This work was supported by the National Natural Science Foundation of China [grant number 51303086], [grant number 51403111], [grant number 51503108]; National Natural Science Foundation of China [grant number 51503107]; Opening program of State Key Laboratory of Solid Lubrication grant number [LSL-1508]; and the Foundation of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education/Shandong Province of China [grant number KF201602].