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        層狀雙金屬氫氧化物吸附劑的功能化改性策略
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        1. 福建工程學院 生態環境與城市建設學院,福建 福州 350118;2. 福建省東升鴻工程建設有限公司, 福建 龍巖 364102

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        Functional modification strategies of layered double hydroxide adsorbents
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        1. School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118,Fujian, China; 2. Fujian Dongsheng Hong Engineering Construction Co., Ltd., Longyan 364102, Fujian, China

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          摘要:

          層狀雙金屬氫氧化物(LDHs)是一類陰離子交換能力強、可調性好、熱穩定性高、活性位點豐富的納米吸附材料,在水中污染物的吸附去除方面呈現出巨大潛力。然而,官能團和結構組分的缺陷嚴重限制了原始LDHs的吸附性能和應用范圍。利用不同改性策略對LDHs進行功能化處理,能顯著增強LDHs的污染物吸附容量、選擇性、穩定性、可回收性以及適用范圍。該文從LDHs吸附水中污染物性能的優化出發,重點綜述了當前常用的插層、表面修飾、煅燒、復合組裝、包埋、制膜等LDHs功能化改性策略,總結了其與水中各種污染物(無機非金屬陰離子、重金屬離子、染料以及抗生素)之間的作用機理。此外,還闡述了相應的再生手段。最后,簡要提出了功能化LDHs吸附劑的優勢以及后期研究可能面臨的障礙,并對其廣闊的應用前景進行了展望。

          Abstract:

          The study of economic, green, and efficient sewage treatment methods has been a major challenge for the water treatment industry due to the complex nature of wastewater and the increasing demand for clean water supply. Layered double hydroxides (LDHs) are a kind of anionic clay with strong anion exchange capacity, good adjustability, high thermal stability, and rich active sites. As a class of adsorption materials, it has been widely used to adsorb various pollutants in wastewater and shows excellent removal performance. However, the defects in functional groups and structural components severely limit the adsorption performance and application range of pristine LDHs. The functionalization of LDHs with different modification strategies can significantly enhance the pollutant adsorption capacity and selectivity, stability, recyclability, as well as application scope. Based on the optimization of the performance of LDHs in the treatment of pollutants in wastewater, this review focuses on the commonly used functional modification strategies of LDHs, such as intercalation, surface modification, calcination, composite assembly, entrapment, and membrane preparation. The intercalation and surface modification treatment increases the number of special functional groups and promotes the selective adsorption of LDHs for target pollutants. The calcination treatment increases the adsorption efficiency of LDHs for anionic pollutants. And the efficient separation and recovery of LDHs can be realized by other methods, such as composite assembly, entrapment, and membrane preparation. Subsequently, the interaction mechanism between functionalized LDHs and various inorganic non-metallic anions, heavy metal ions, organic dyes, and antibiotic pollutants in wastewater was summarized. In addition, the regeneration methods of functionalized LDHs were also described. Finally, the advantages and the possible obstacles of functionalized LDH adsorbents in the next study were briefly proposed, and its broad application prospects were provided.

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        蔣柱武,吳夢帆,史安童,姚寧,李妍.層狀雙金屬氫氧化物吸附劑的功能化改性策略[J].精細化工,2023,40(6):

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        • 收稿日期:2022-09-13
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        • 在線發布日期: 2023-06-28
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