ABSTRACT

Highly efficient simultaneous removal of paracetamol and Cu²⁺ ions from aqueous solutions was accomplished by using bovine bone char (BC). The adsorption behaviour was determined by kinetic and equilibrium studies of both single and binary system solutions. BC is a predominantly mesoporous material with a surface area of 103 m² g⁻¹. The influence of the initial pH on Cu²⁺ removal was tested, suggesting that the optimal pH was 3.0. The removal of paracetamol from single and binary systems was 9.45 and 12.7%, respectively. On the other hand, the Cu²⁺ removal was 36.2% for a single system, suggesting a higher affinity for BC. Moreover, in the case of binary mixtures, the presence of paracetamol led to an enhanced affinity of Cu²⁺ due to a synergistic/cooperative mechanism, which led to a copper removal of 97.3%. The cooperative model was successfully adjusted to the equilibrium data of the binary systems. The modelling results indicated the formation of a first adsorption layer where paracetamol and copper are retained, and a second layer with a great affinity for copper ions after the formation of a Cu-paracetamol complex, leading to higher removal of Cu²⁺.

摘要

使用牛骨炭 (BC) 可以高效同时去除水溶液中的扑热息痛和 Cu ^2+离子。吸附行为由单一和二元系统溶液的动力学和平衡研究确定。BC是一种主要的介孔材料，其表面积为103 m ²  g ^-1。测试了初始pH对Cu ²⁺去除的影响，表明最佳pH为3.0。从单一和二元系统中对乙酰氨基酚的去除率分别为 9.45% 和 12.7%。另一方面，Cu ²⁺单个系统的去除率为 36.2%，表明对 BC 的亲和力更高。^{此外，在二元混合物的情况下，扑热息痛的存在由于协同/协同机制导致 Cu 2+}的亲和力增强，从而导致铜去除率为 97.3%。合作模型成功地适应了二元系统的平衡数据。建模结果表明形成了第一吸附层，其中扑热息痛和铜被保留，第二吸附层在形成Cu-扑热息痛络合物后对铜离子具有很强的亲和力，导致更高的Cu ²⁺去除。