Heavy metal pollution is a serious environmental problem, and adsorption is regarded as an effective technology for metal ions removal. A new absorbent triethylene tetramine (TETA)-modified crosslinked polyacrylonitrile (TETA-modified XL-PAN) was prepared by photo-induced precipitation polymerization of acrylonitrile in water at room temperature using FeC₂O₄ as photoinitiator and N,N′-methylenebisacrylamide as crosslinking agent. The TETA provided amidogens, to bond Cu(II) ions and the crosslinking agent was used to improve the stability of adsorbent. FTIR, SEM, BET, and TG were used to characterize the TETA-modified XL-PAN. The FTIR results demonstrate that the XL-PAN was successfully modified by TETA. The SEM images show that TETA-modified XL-PAN powders were agglomerated from 100 to 200 nm spherical particles. TETA-modified XL-PAN was used as an adsorbent to remove Cu(II) ion from wastewater. The effects of contact time, pH, Cu(II) concentration, temperature, and reuse cycles on adsorption were investigated, respectively. Experimental results showed that the adsorption isotherms agreed well with the Langmuir model and a chemical adsorption between TETA-modified XL-PAN and Cu(II) was inferred. After optimizing the experimental conditions, the maximum adsorption capacity of TETA-modified XL-PAN for Cu(II) was 46.6 mg/g with an adsorption time of 8 h. Furthermore, the TETA-modified XL-PAN adsorbent can be well regenerated by acid solutions. After eight regeneration and adsorption processes, the adsorption capacity still reached more than 90% of the first adsorption capacity. These results demonstrated the potential use of TETA-modified XL-PAN as an effective adsorbent for Cu(II) ions removal from wastewater.

重金属污染是一个严重的环境问题，吸附被认为是去除金属离子的有效技术。以FeC ₂ O ₄为光引发剂，以N，N'为原料，在室温下水中丙烯腈的光致沉淀聚合制备了一种新型的吸收性三亚乙基四胺（TETA）改性的交联聚丙烯腈（TETA改性的XL-PAN）。-亚甲基双丙烯酰胺作为交联剂。TETA提供了酰胺基，可以键结Cu（II）离子，并且使用交联剂来提高吸附剂的稳定性。FTIR，SEM，BET和TG用于表征TETA改性的XL-PAN。FTIR结果表明，XL-PAN已成功被TETA改性。SEM图像显示TETA改性的XL-PAN粉末从100至200nm的球形颗粒附聚。使用TETA改性的XL-PAN作为吸附剂，以去除废水中的Cu（II）离子。分别研究了接触时间，pH，Cu（II）浓度，温度和重复使用周期对吸附的影响。实验结果表明，吸附等温线与Langmuir模型吻合得很好，并推断出TETA修饰的XL-PAN与Cu（II）之间的化学吸附。优化实验条件后，TETA改性XL-PAN对Cu（II）的最大吸附容量为46.6 mg / g，吸附时间为8 h。此外，TETA改性的XL-PAN吸附剂可通过酸性溶液很好地再生。经过八次再生和吸附过程，吸附量仍达到首次吸附量的90％以上。这些结果证明了将TETA改性的XL-PAN用作从废水中去除Cu（II）离子的有效吸附剂的潜在用途。吸附容量仍达到第一吸附容量的90％以上。这些结果证明了将TETA改性的XL-PAN用作从废水中去除Cu（II）离子的有效吸附剂的潜在用途。吸附容量仍达到第一吸附容量的90％以上。这些结果证明了将TETA改性的XL-PAN用作从废水中去除Cu（II）离子的有效吸附剂的潜在用途。