Yimer Mesfin, Ansari Shagufi Naz, Berehe Biniyam Abdu, Gudimella Krishna Kanthi, Gedda Gangaraju, Girma Wubshet Mekonnen, Hasan Nazim, Tasneem Shadma
Department of Chemistry, College of Natural Science, Wollo University, P.O. Box:1145, Dessie, Ethiopia.
Department of Chemistry, School of Engineering, Presidency University, Bangalore, Karnataka, 560064, India.
BMC Chem. 2024 Jan 29;18(1):23. doi: 10.1186/s13065-024-01128-z.
Heavy metals like Cadmium, Lead, and Chromium are the pollutants emitted into the environment through industrial development. In this work, a new diphenylamine coordinated cobalt complex (Co-DPA) has been synthesized and tested for its efficiency in removing heavy metals from wastewater, and its adsorption capacity was investigated. The effectiveness of heavy metals removal by Co-DPA was evaluated by adjusting the adsorption parameters, such as adsorbent dose, pH, initial metals concentration, and adsorption period. Heavy metal concentrations in real sample were 0.267, 0.075, and 0.125 mg/L for Cd, Pb, and Cr before using as-synthesized Co-DPA to treat wastewater. After being treated with synthesized Co-DPA the concentration of heavy metals was reduced to 0.0129, 0.00028, 0.00054 mg/L for Cd, Pb, and Cr, respectively, in 80 min. The removal efficiency was 95.6%, 99.5%, and 99.5% for the respective metals. The adsorption process fitted satisfactorily with Freundlich isotherm with R(0.999, 0.997, 0.995) for Cd, Pb, and Cr, respectively. The kinetic data obeyed the pseudo-second order for Cd and Cr and the pseudo-first order for Pb. Based on the results obtained within the framework of this study, it is concluded that the as-synthesized Co-DPA is a good adsorbent to eliminate heavy metal ions like Cd, Pb, and Crfrom wastewater solution. In general, Co-DPA is a promising new material for the removal of heavy metal ions from water.
镉、铅和铬等重金属是工业发展过程中排放到环境中的污染物。在本研究中，合成了一种新型二苯胺配位钴配合物（Co-DPA），并测试了其从废水中去除重金属的效率，同时研究了其吸附容量。通过调整吸附参数，如吸附剂用量、pH值、初始金属浓度和吸附时间，评估了Co-DPA去除重金属的效果。在使用合成的Co-DPA处理废水之前，实际样品中镉、铅和铬的重金属浓度分别为0.267、0.075和0.125mg/L。用合成的Co-DPA处理后，在80分钟内，镉、铅和铬的重金属浓度分别降至0.0129、0.00028和0.00054mg/L。各金属的去除效率分别为95.6%、99.5%和99.5%。吸附过程符合Freundlich等温线，镉、铅和铬的R值分别为0.999、0.997和0.995。动力学数据表明，镉和铬符合准二级动力学，铅符合准一级动力学。基于本研究框架内获得的结果，得出结论：合成的Co-DPA是一种从废水溶液中去除镉、铅和铬等重金属离子的良好吸附剂。总体而言，Co-DPA是一种有前景的新型材料，可用于从水中去除重金属离子。
