The development of greener and more efficient materials for extracting environmental contaminants from various matrices is a growing area of research. Materials that do not cause secondary pollution are highly desirable in such applications. Chitosan (CS) is a non-toxic biopolymer enriched with amino and hydroxyl groups, used not only for extracting pollutants but also for crosslinking and functionalizing CS with other materials. The composites of CS with carbon, metal-organic frameworks, metal and metal oxide nanoparticles, and magnetic materials have been used to extract various inorganic and organic analytes in aqueous samples. CS-based sorbents have been evaluated across multiple extraction techniques, such as dispersive solid phase extraction, magnetic solid phase extraction, solid phase microextraction, syringe solid phase extraction, membrane-protected solid phase extraction, and others. This review offers an overview of the CS-based sorbents in analytical extractions, highlighting their strengths, weaknesses, and potential solutions. At the end, a brief overview of the CS-based adsorbents in water treatment applications is also provided.

开发用于从各种基质中提取环境污染物的更环保、更高效的材料是一个不断发展的研究领域。在此类应用中非常需要不会造成二次污染的材料。壳聚糖 (CS) 是一种富含氨基和羟基的无毒生物聚合物，不仅可用于提取污染物，还可用于 CS 与其他材料的交联和功能化。CS 与碳、金属-有机骨架、金属和金属氧化物纳米粒子以及磁性材料的复合物已被用于提取水样中的各种无机和有机分析物。基于 CS 的吸附剂已通过多种萃取技术进行了评估，例如分散固相萃取、磁性固相萃取、固相微萃取、注射器固相萃取、膜保护固相萃取等。本综述概述了分析萃取中基于 CS 的吸附剂，强调了它们的优点、缺点和潜在的解决方案。最后，还简要概述了基于 CS 的吸附剂在水处理应用中的应用。