Affiliation:
1. School of Materials Science and Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan People's Republic of China
2. State Key Laboratory of Marine Resources Utilization in South China Sea School of Food Science and Engineering, Hainan University Haikou China
3. School of Chemistry and Chemical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan China
4. Shandong Rike Chemical Co., Ltd. Weifang People's Republic of China
5. Research Center for Eco‐Environmental Sciences Chinese Academy of Science Beijing People's Republic of China
Abstract
AbstractWastewater containing dyes is frequently discharged by industrial processes and needs separation and recycling. To solve this problem, it is important to research and develop environmentally friendly, efficient adsorbent materials for pollutant separation and recovery. In this study, a poly(PEI‐catechol‐tetraethylenepentamine) (PPCT) adsorbent was synthesized using a simple catecholamine reaction. This adsorbent exhibited high adsorption capacity and excellent removal efficiency for Reactive Red 195 (RR‐195) in wastewater. The material was characterized using SEM, FT‐IR, TGA, EA, and XPS. Its performance was optimized by varying the type of polyethyleneimine and the amount added during the preparation process. The effects of temperature, pH, contact time, and salt concentration on the adsorption were systematically investigated. Additionally, the experimental data showed consistency with both the Langmuir and pseudo‐second‐order kinetic models, simultaneously. The maximum adsorption capacity can reach 1754 mg g−1 at 303 K, with a retention rate of 86.6% after two cycles. The removal rate exceeds 98% at a concentration of 400 mg g−1 or lower. Additionally, the protonated amine group in PPCT carries a positive charge under acidic conditions, enabling selective adsorption of the anionic dye RR‐195. Consequently, PPCT exhibits an excellent adsorption effect on RR‐195 and holds promising applications in pollutant removal.
Funder
Natural Science Foundation of Shandong Province
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry