期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 13, 页码 15002-15011出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b19734
关键词
water treatment; heavy metal removal; wood membrane; sulfhydryl functionalization; environmental remediation
资金
- National Natural Science Foundation of China [21876072, 21977041]
- Fundamental Research Funds for the Central Universities [lzujbky-2017-105]
Heavy metal pollution is a severe problem worldwide. Great efforts have been devoted in developing effective and eco-friendly ways to remove heavy metal ions from contaminated water. However, challenges remain in terms of the high cost, the complex preparation processes required, low efficiency, and difficulties in scaling-up. Here, we report a sulthydryl-functionalized wood (SH-wood) membrane featuring three-dimensional mesoporous and low-tortuosity lumens, which serve as multisite metal traps to achieve highly efficient heavy metal ion removal from wastewater. Benefiting from the unique microstructure of wood, the resulting membrane exhibits a high saturation uptake capacity of 169.5, 384.1, 593.9, and 710.0 mg.g(-1) for Cu2+, Pb2+, Cd2+, and Hg2+ ions, respectively. Meanwhile, the SH-wood membrane can be easily regenerated at least eight times without apparent performance loss. Furthermore, stacking multilayers of the SH-wood filter is designed. Because of its high yet universal heavy metal ion absorbance capability, the multilayer SH-wood filter can effectively remove diverse heavy metal ions from real contaminated water, meeting the WHO standards while also displaying a high flux rate of 1.3 X 10(3) L. m(-2).h(-1). Our work presents a promising strategy for the scalable and highly efficient removal of heavy metal ions from sewage for environmental remediation.
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