Waste of Mytella falcata shell was used as low-cost adsorbent to remove the biocide Basic Green 4 (BG4) from water. Shells were collected form trash nearby the lagoon were Mytella falcata is fished. After clean, dry and crushed, the powder was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), and X-ray dispersive energy spectroscopy (EDS). Both kinetic and equilibrium adsorption tests are carried out. Adsorbent regenerability was tested during adsorption/desorption cycles, using a UV photo-regeneration process. The maximum adsorption capacity reached 539.24 mg.g-1 (60 °C), which was higher than those retrieved for other materials with similar origin. The kinetic results indicated that the process followed pseudo-second order model. Equilibrium data indicate an increase in BG4 adsorption capacity with temperature and Sips model had better fit for all the investigated temperatures (30, 40, 50 and 60 °C). The regeneration/reuse test indicated that the adsorbent is able to assure a BG4 removal above 70 % during five adsorption/desorption cycles evaluated. Thermodynamic parameters suggested that adsorption is spontaneous, endothermal, governed by chemisorption and with structural changes in the solid surface upon adsorption.

Mytella falcata 壳的废料用作低成本吸附剂，从水中去除杀菌剂 Basic Green 4 (BG4)。贝壳是从泻湖附近的垃圾中收集的，用于捕捞 Mytella falcata。清洁、干燥和粉碎后，粉末通过扫描电子显微镜 (SEM)、傅里叶变换红外光谱 (FT-IR)、X 射线粉末衍射 (XRD) 和 X 射线色散能谱 (EDS) 进行表征。进行了动力学和平衡吸附试验。在吸附/解吸循环期间，使用紫外线光再生过程测试吸附剂的再生能力。最大吸附容量达到 539.24 mg.g-1 (60 °C)，高于其他类似来源的材料。动力学结果表明该过程遵循伪二级模型。平衡数据表明 BG4 吸附容量随温度增加，Sips 模型更适合所有研究的温度（30、40、50 和 60 °C）。再生/再利用测试表明，在评估的五个吸附/解吸循环期间，吸附剂能够确保 BG4 去除率超过 70%。热力学参数表明吸附是自发的、吸热的，受化学吸附控制，吸附后固体表面的结构发生变化。