The use of deep eutectic solvent (DES)-based treatment is a potential solution for the effective disposal of heavy-metal-enriched biomass. However, energy-intensive recycling and inefficient reusability of DESs hinder industrialization of the process. Herein, instead of recycling DESs, we design a novel DES and develop a simultaneous process including biomass pretreatment and conversion of the obtained DES into an adhesive. The treatment successfully removes approximately 97% of Cd from the biomass, over 60% of lignin, and a small amount of polysaccharides. The inclusion of these components improves the adhesion of the DES, with the mechanism revealed by the molecular dynamics simulations. In addition, by incorporating a polymer network, the DES-based adhesive acquires superior adhesion strength and resistance to harsh environments. The techno-economic analysis reveals the competitive economic performance of this adhesive. These results offer a promising waste-free strategy for a synergetic utilization of heavy-metal-enriched plants.

使用基于低共熔溶剂（DES）的处理是有效处置富含重金属的生物质的潜在解决方案。然而，DES 的能源密集型回收和低效的可重复使用性阻碍了该过程的工业化。在此，我们不是回收 DES，而是设计了一种新型 DES，并开发了一种同步工艺，包括生物质预处理和将获得的 DES 转化为粘合剂。该处理成功去除了生物质中约 97% 的镉、超过 60% 的木质素和少量多糖。分子动力学模拟揭示了这些成分的加入提高了 DES 的粘附力。此外，通过结合聚合物网络，基于DES的粘合剂获得了优异的粘合强度和对恶劣环境的耐受性。技术经济分析揭示了这种粘合剂具有竞争性的经济性能。这些结果为协同利用富含重金属的植物提供了一种有前景的无废物策略。