Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 9, Issue 1, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2020.104704
Keywords
Polyurethane plastic waste; Activated carbon; Adsorption removal; Malachite green; Dye
Categories
Funding
- Fundamental Research Funds for the Central Universities [20CX02206A]
- Development Fund of State Key Laboratory of Heavy Oil Processing
- National Natural Science Foundation of China (NSFC) [21776313]
- National key R & D program of China [2017YFB0602500]
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Upcycling PUPW into AC for MG removal in wastewater is cost-effective and environmentally friendly. Different preparation procedures lead to varied properties of PUPW-AC, with intentional modulation possible. PUPW-AC-C-A shows excellent adsorption performance for MG due to electrostatic attraction, oxygen-containing groups, and pi-pi interaction.
Upcycling polyurethane plastic waste (PUPW) into activated carbon (AC) for the removal of malachite green dye (MG) in wastewater via physical adsorption could provide abundant low-cost adsorbent and facilitate treatment of plastic waste and wastewater simultaneously. For this reason, four types of PUPW-ACs were prepared by various preparation procedures. The properties of PUPW-ACs were characterized using BET, FT-IR, XPS, Raman spectroscopy, and XRD; the adsorption performances of PUPW-ACs were also evaluated. It was found that the properties of PUPW-ACs varied in terms of porosity, microstructures, and surface chemistry. Intentional modulation of PUPW-AC would be possible via preparation procedure adjustment. Two-step preparation procedure (1. carbonization; 2. activation) was recommended to acquire PUPW-AC (i.e., PUPW-AC-C-A) with a high specific surface area of 1034 m(2) g(-1) and the maximum MG adsorption capacity of 1428 mg g(-1). Electrostatic attraction, oxygen-containing groups (especially carboxyl functional groups), and pi-pi interaction were believed to contribute to the adsorption driving force for the outstanding adsorption performance of MG on PUPW-AC-C-A. The PUPW-AC prepared from PUPW could serve as a promising adsorbent used in MG dye removal from aqueous systems.
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