Raupp Íris Nunes, Valério Filho Alaor, Arim Aline Lemos, Muniz Ana Rosa Costa, da Rosa Gabriela Silveira
Graduate Program in Engineering, Federal University of Pampa, 810 Tiaraju Avenue, Alegrete 97546-550, Brazil.
Graduate Program in Science and Materials Engineering, Technology Development Center, Federal University of Pelotas, 1 Gomes Carneiro, Pelotas 96010-610, Brazil.
Materials (Basel). 2021 Nov 12;14(22):6820. doi: 10.3390/ma14226820.
The lack of adequate treatment for the removal of pollutants from domestic, hospital and industrial effluents has caused great environmental concern. Therefore, there is a need to develop materials that have the capacity to treat these effluents. This work aims to develop and characterize an activated charcoal from olive pomace, which is an agro-industrial residue, for adsorption of Nimesulide in liquid effluent and to evaluate the adsorption kinetics and equilibrium using experimental design. The raw material was oven dried at 105 °C for 24 h, ground, chemically activated in a ratio of 1:0.8:0.2 of olive pomace, zinc chloride and calcium hydroxide and thermally activated by pyrolysis in a reactor of stainless steel at 550 °C for 30 min. The activated carbon was characterized by Fourier Transform Infrared (FTIR) spectroscopy, X-ray Diffractometry (XRD), Brunauer, Emmett and Teller (BET) method, Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), density and zero charge potential analysis. The surface area obtained was 650.9 m g. The kinetic and isothermal mathematical models that best described the adsorption were PSO and Freundlich and the highest adsorption capacity obtained was 353.27 mg g. The results obtained showed the good performance of activated carbon produced from olive pomace as an adsorbent material and demonstrated great potential for removing emerging contaminants such as Nimesulide.
缺乏对生活污水、医院污水和工业废水污染物的充分处理方法已引起了极大的环境关注。因此，有必要开发能够处理这些废水的材料。本研究旨在开发并表征一种由橄榄果渣（一种农业工业废渣）制成的活性炭，用于吸附液体废水中的尼美舒利，并通过实验设计评估吸附动力学和吸附平衡。将原料在105℃烘箱中干燥24小时，研磨后，按橄榄果渣、氯化锌和氢氧化钙1:0.8:0.2的比例进行化学活化，并在不锈钢反应器中于550℃热解30分钟进行热活化。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、布鲁诺尔-埃米特-泰勒（BET）法、热重分析（TGA）、扫描电子显微镜（SEM）、密度和零电荷电位分析对活性炭进行表征。所得比表面积为650.9 m²/g。最能描述吸附过程的动力学和等温数学模型分别为PSO模型和弗伦德利希模型，获得的最高吸附容量为353.27 mg/g。研究结果表明，由橄榄果渣制备的活性炭作为吸附材料具有良好的性能，在去除尼美舒利等新型污染物方面具有巨大潜力。
