Poznan University of Technology, Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Berdychowo 4, PL-60965 Poznan, Poland.
Poznan University of Technology, Faculty of Chemical Technology, Institute of Chemistry and Technical Electrochemistry, Berdychowo 4, PL-60965 Poznan, Poland.
Sci Total Environ. 2018 Jan 15;612:1223-1233. doi: 10.1016/j.scitotenv.2017.09.037. Epub 2017 Sep 8.
The use of chitin modified with kraft lignin as an effective sorbent of ibuprofen and acetaminophen is described for the first time. It was determined how the parameters (contact time, pH, mass of sorbent and temperature) influence the effectiveness of the adsorption process. The adsorption kinetics were calculated using pseudo-first-order, pseudo-second-order (types 1-4) and intra-particle diffusion models, and thermodynamic parameters were determined. The experimental data better correspond to a pseudo-second-order kinetic model of type 1 in the case of both tested pharmaceuticals (r=0.999). The negative values of ΔH° show the adsorption to be exothermic (-5.515kJ/mol and -5.161kJ/mol for ibuprofen and acetaminophen respectively). Adsorption isotherms, using Langmuir isotherms of types 1-4 and Freundlich model, were also determined. The experimental data better correspond to the Langmuir type 1 model in the case of ibuprofen, and to the Freundlich model in the case of acetaminophen. Desorption tests were carried out to confirm the possibility of reusing the chitin/lignin system. A mechanism of adsorption of ibuprofen and acetaminophen on the chitin/lignin system was also proposed.
首次描述了用经过 kraft 木质素改性的壳聚糖作为布洛芬和对乙酰氨基酚的有效吸附剂。研究了参数（接触时间、pH 值、吸附剂质量和温度）如何影响吸附过程的有效性。使用准一级、准二级（类型 1-4）和内扩散模型计算了吸附动力学，并确定了热力学参数。对于两种测试药物（布洛芬和对乙酰氨基酚），实验数据更符合准二级动力学模型类型 1（r=0.999）。ΔH°的负值表明吸附是放热的（分别为-5.515kJ/mol 和-5.161kJ/mol）。还使用类型 1-4 的 Langmuir 等温线和 Freundlich 模型确定了吸附等温线。对于布洛芬，实验数据更符合 Langmuir 类型 1 模型，而对于对乙酰氨基酚，实验数据更符合 Freundlich 模型。进行了脱附测试以确认重复使用壳聚糖/木质素系统的可能性。还提出了布洛芬和对乙酰氨基酚在壳聚糖/木质素系统上的吸附机理。
