期刊
WATER ENVIRONMENT RESEARCH
卷 93, 期 1, 页码 159-169出版社
WILEY
DOI: 10.1002/wer.1376
关键词
adsorption; clay; carbon composite; Eosin Y; pH; spent bleaching earth
资金
- National Natural Science Foundation of China [51878251] Funding Source: Medline
- University-Industry Cooperation Research Project in Henan Province [182107000006] Funding Source: Medline
- Doctoral Scientific Research Start-up Foundation from Henan University of Technology [2020BS005] Funding Source: Medline
The environmentally friendly clay/carbon composite was prepared by pyrolysis of industrial waste and tested for dye removal. The material showed higher adsorption capacity, exothermic and spontaneous adsorption process, pH-independent, and potential for dye elimination, possibly due to various interactions.
The environmentally friendly clay/carbon composite (SBE/C) was prepared by one-step pyrolysis under N(2)atmosphere at 700 degrees C of spent bleaching earth (SBE) from the industrial waste of the refined oil industry. SBE/C was tested to remove anionic dye Eosin Y from aqueous water. The results revealed that SBE/C had larger specific surface area than SBE, and the equilibrium adsorption capacity of SBE/C (11.15 mg/g) was about 3 times than that of SBE (4.04 mg/g). The adsorption process was found to be exothermic and spontaneous. The adsorption capacity of SBE/C was independent on pH (5-12), and exhibits satisfactorily recyclable performance. Combined with characterization analysis, the adsorption mechanism likely includes electrostatic interaction, hydrogen bonding, hydrophobic interaction, halogen bonding, and pi-pi interaction. Overall, this exploration of SBE/C might open a window to the design of an efficient and low-cost adsorbent for Eosin Y dye elimination from wastewater. Practitioner points The resource utilization of industrial waste SBE was achieved. SBE/C was synthesized and tested to adsorb Eosin Y for the first time. SBE/C had characteristics with porous structure and large surface area. pH had little effect on adsorption capacity of SBE/C for Eosin Y. SBE/C exhibited potential for dye elimination from wastewater.
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