In view of the valorisation of the green microalga Scenedesmus obliquus biomass, it was used for the biosorption of two nonsteroidal anti-inflammatory drugs, namely salicylic acid and ibuprofen, from water. Microalgae biomass was characterized, namely by the determination of the point of zero charge (pH_PZC), by Fourier transform infrared (FT-IR) analysis, simultaneous thermal analysis (STA) and scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS). Kinetic and equilibrium batch experiments were carried out and results were found to fit the pseudo-second order equation and the Langmuir isotherm model, respectively. The Langmuir maximum capacity determined for salicylic acid (63 mg g⁻¹) was larger than for ibuprofen (12 mg g⁻¹), which was also verified for a commercial activated carbon used as reference (with capacities of 250 and 147 mg g⁻¹, respectively). For both pharmaceuticals, the determination of thermodynamic parameters allowed us to infer that adsorption onto microalgae biomass was spontaneous, favourable and exothermic. Furthermore, based on the biomass characterization after adsorption and energy associated with the process, it was deduced that the removal of salicylic acid and ibuprofen by Scenedesmus obliquus biomass occurred by physical interaction.

中文翻译：

---

绿色微藻斜des藻用于吸附去除水样中的非甾体类抗炎药（NSAIDs）。

鉴于绿色微藻斜生生物量的价值，它被用于从水中生物吸附两种非甾体抗炎药，即水杨酸和布洛芬。微藻生物质的特征在于，通过确定零电荷点（pH _PZC），傅里叶变换红外（FT-IR）分析，同时热分析（STA）和带能谱仪的扫描电子显微镜（SEM / EDS） 。进行了动力学和平衡批处理实验，发现结果分别拟合拟二阶方程和Langmuir等温模型。水杨酸（63 mg g ^-1）的Langmuir最大容量大于布洛芬（12 mg g ^-1）的最大容量），也已验证了用作参考的市售活性炭（容量分别为250和147 mg g ^-1）。对于这两种药物，热力学参数的确定使我们可以推断微藻生物质上的吸附是自发的，有利的并且是放热的。此外，根据吸附后的生物质特征和与过程相关的能量，推论斜Scene生物质对水杨酸和布洛芬的去除是通过物理相互作用进行的。