Zhang Ting, Huang Xiaoyi, Qiao Jiaojiao, Liu Yang, Zhang Jingjing, Wang Yi
School of Petrochemical Engineering, Lanzhou University of Technology Lanzhou P. R. China
RSC Adv. 2024 May 20;14(23):16300-16317. doi: 10.1039/d4ra02014f. eCollection 2024 May 15.
Attapulgite clay, due to its unique crystalline hydrated magnesium-aluminium silicate composition and layer-chain structure, possesses exceptional adsorption and catalytic properties, which enable it or its composites to be utilized as adsorbents and catalysts for wastewater treatment. But the drawbacks of attapulgite are also very obvious, such as relatively low specific surface area (compared to traditional adsorbents such as activated carbon and activated alumina), easy aggregation, and difficulty in dispersion. In order to fully utilize and improve the performance of attapulgite, researchers have conducted extensive research on its modification, but few specialized works have comprehensively evaluated the synthesis, applications and challenges for attapulgite-based composite materials in refractory organic wastewater treatments. This paper provides a comprehensive review of controllable preparation strategies, characterization methods and mechanisms of attapulgite-based composite materials, as well as the research progress of these materials in refractory organic wastewater treatment. Based on this review, constructive recommendations, such as deep mechanism analysis from molecular level multi-functional attapulgite-based material developments, and using biodegradable materials in attapulgite-based composites, were proposed.
凹凸棒石粘土因其独特的结晶水合镁铝硅酸盐组成和层链结构，具有优异的吸附和催化性能，使其或其复合材料能够用作废水处理的吸附剂和催化剂。但凹凸棒石的缺点也非常明显，如比表面积相对较低（与活性炭和活性氧化铝等传统吸附剂相比）、易团聚、难以分散。为了充分利用和提高凹凸棒石的性能，研究人员对其改性进行了广泛研究，但很少有专门的工作全面评估基于凹凸棒石的复合材料在难降解有机废水处理中的合成、应用和挑战。本文全面综述了基于凹凸棒石的复合材料的可控制备策略、表征方法和机理，以及这些材料在难降解有机废水处理中的研究进展。基于此综述，提出了建设性建议，如从分子水平对多功能凹凸棒石基材料的开发进行深入机理分析，以及在凹凸棒石基复合材料中使用可生物降解材料等。
