标题: Activating Adsorption Sites of Waste Crayfish Shells via Chemical Decalcification for Efficient Capturing of Nanoplastics

作者: Liu, FT (Liu, Fangtian); Wu, Y (Wu, Yang); Long, M (Long, Min); Ma, YF (Ma, Yifan); Zheng, M (Zheng, Min); Cao, SY (Cao, Shiyi); Chen, SX (Chen, Shixiong); Du, YM (Du, Yumin); Chen, CJ (Chen, Chaoji); Deng, HB (Deng, Hongbing)

来源出版物: ACS NANO 卷: 18 期: 24 页: 15779-15789 DOI: 10.1021/acsnano.4c02511 Early Access Date: JUN 2024 Published Date: 2024 JUN 4

摘要: The property of being stubborn and degradation resistant makes nanoplastic (NP) pollution a long-standing remaining challenge. Here, we apply a designed top-down strategy to leverage the natural hierarchical structure of waste crayfish shells with exposed functional groups for efficient NP capture. The crayfish shell-based organic skeleton with improved flexibility, strength (14.37 to 60.13 MPa), and toughness (24.61 to 278.98 MJ m(-3)) was prepared by purposefully removing the inorganic components of crayfish shells through a simple two-step acid-alkali treatment. Due to the activated functional groups (e.g., -NH2, -CONH-, and -OH) and ordered architectures with macropores and nanofibers, this porous crayfish shell exhibited effective removal capability of NPs (72.92 mg g(-1)) by physical interception and hydrogen bond/electrostatic interactions. Moreover, the sustainability and stability of this porous crayfish shell were demonstrated by the maintained high-capture performance after five cycles. Finally, we provided a postprocessing approach that could convert both porous crayfish shell and NPs into a tough flat sheet. Thus, our feasible top-down engineering strategy combined with promising posttreatment is a powerful contender for a recycling approach with broad application scenarios and clear economic advantages for simultaneously addressing both waste biomass and NP pollutants.

作者关键词: nanoplastics; biomass waste; chitin; top-down strategy; highly ordered architecture

地址: [Liu, Fangtian; Wu, Yang; Long, Min; Ma, Yifan; Zheng, Min; Cao, Shiyi; Du, Yumin; Chen, Chaoji; Deng, Hongbing] Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Chen, Shixiong] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China.

通讯作者地址: Chen, CJ; Deng, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

电子邮件地址: chenchaojili@whu.edu.cn; hbdeng@whu.edu.cn

影响因子：15.8