Journal
BIORESOURCE TECHNOLOGY
Volume 352, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127080
Keywords
Adsorption; Biomass; Dopamine; Dye wastewater; Polymer brush
Funding
- National Natural Science Foundation of China [52003128]
- Natural Science Foundation of Shandong province [ZR2021QE112]
- Young Doctor Cooperation Founda-tion [2019BSHZ001]
- Qilu University of Technology (Shandong Academy of Sciences)
- [2020KJC-ZD12]
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This study presents the development of a biomass adsorbent containing discarded wool substrate, photocatalytic PDA coating, and zwitterionic polymer brushes. The adsorbent exhibits high adsorption capacity, rapid adsorption rate, switchable adsorption selectivity, and pH-controlled regeneration capability. The adsorbent can fulfill various needs of both static and dynamic adsorptions, and the constructed photocatalytic PDA coating allows for consecutive adsorption-degradation-regeneration utilization.
Dye wastewater and discarded biofiber have brought huge pressure to sustainable developments of ecology and economy. By utilizing dopamine chemistry and benzophenone mediated grafting onto atom transfer radical polymerization (ATRP), this work reported a biomass adsorbent containing discarded wool substrate, photocatalytic PDA coating and zwitterionic polymer brushes for dyes removal. The grafted zwitterionic polymer brushes impart the material with not only high adsorption capacity and rapid adsorption rate, but also switchable adsorption selectivity and pH-controlled regeneration capability. Benefiting from such outstanding adsorption performance and excellent free-standing property, the adsorbent could fulfill diversified needs of both static and dynamic adsorptions. Under daylight, the constructed photocatalytic PDA coating could in-situ degrade the captured pollutant, thus achieving consecutive adsorption-degradation-regeneration utilization. Furthermore, through simple dip-coating and cleaner UV-irradiation techniques, the preparation process could be scaled up. This work contributes to both the upcycling of discarded biofiber waste and the development of advanced biomass adsorbent.
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