Abstract: Under the guidance of the goal of “carbon peaking and carbon neutrality”, aiming at the important problem of waste plastic recycling economy, using the characteristics of “memory effect” of layered double hydroxide (LDHs), we design a research-based comprehensive experiment on the preparation and performance test of dechlorinated adsorbents. The experimental process involves: firstly, synthesizing LDHs through a co-precipitation method and then roasting the LDHs to obtain composite metal oxides (LDO), finally introducing LDO as a dechlorination agent into a chlorinated environment simulated by n-dodecane, NaCl, and deionized water. The adsorption properties are measured at multiple stages, and the structural changes of the adsorbent are characterized. After the adsorption process, the adsorbent undergoes roasting, and its dechlorination performance is evaluated again. This cycle is repeated several times to assess the stability of the adsorbent. This experiment serves as a model for integrating scientific research into educational practice, providing novel approaches for the development of reusable dechlorination agents. Moreover, it enhances students’ environmental awareness, cultivates their scientific research literacy, and sparks their interest in research.

Key words: Carbon peaking and carbon neutrality goals, Waste plastic recycling, Layered double hydroxide, Dechlorination, Research-based comprehensive experiment