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Use of brewing industry waste to produce carbon-based adsorbents: Paracetamol adsorption study
Journal of Environmental Science and Health, Part A ( IF 1.9 ) Pub Date : 2020-04-29 , DOI: 10.1080/10934529.2020.1759320
Beatriz Nadolny 1 , Raphael G. Heineck 2 , Heitor A. G Bazani 3 , Johann V. Hemmer 2 , Maria L. Biavatti 2 , Claudemir M. Radetski 4 , Gizelle I. Almerindo 2
Affiliation  

This work aimed to produce activated carbon (AC) from brewing industry waste (the malt bagasse) to adsorb Paracetamol. Malt bagasse was characterized by moisture and ash contents and thermogravimetric analysis. Three types of AC were prepared: C400 (400 °C) and C500 (500 °C) under oxidizing atmosphere, and CN550 (550 °C) under nitrogen atmosphere. Some of these ACs were characterized by pH, point of zero charge (pHPZC), infrared spectroscopy, N2 adsorption-desorption isotherms, scanning electron microscopy, and temperature-programed desorption of CO2 and NH3. A pHPZC value < 7.0 and high density of acid sites were identified for CN550. Specific surface areas were between 192.5 and 364.0 m2.g−1. Adsorption kinetic studies were performed in a batch system with 50 mL of Paracetamol solution (100 mg.L−1) under pH 4 and 0.75 g of adsorbent (optimized conditions). The time to reach adsorption equilibrium was 20 min with 98.3% Paracetamol removal for CN550 AC. The pseudo-second order model and the Langmuir isotherm best fitted experimental data. Brewing industry waste can be used as a source of organic matter for AC production, since the percentage of Paracetamol removal in this study showed that CN550 AC presentes high adsorption efficiency and economically viable production.



中文翻译:

利用啤酒工业废料生产碳基吸附剂:扑热息痛吸附研究

这项工作旨在从酿造业的废物(麦芽蔗渣)中生产活性炭(AC),以吸附扑热息痛。麦芽蔗渣的特征在于水分和灰分含量以及热重分析。制备了三种类型的交流电:在氧化气氛下为C400(400°C)和C500(500°C),在氮气气氛下为CN550(550°C)。这些AC中的某些AC具有以下特征:pH,零电荷点(pH PZC),红外光谱,N 2吸附-解吸等温线,扫描电子显微镜和程序升温脱附的CO 2和NH 3。CN550的pH PZC值<7.0,酸位密度高。比表面积在192.5至364.0 m 2之间.g -1。吸附动力学研究是在pH为4的条件下,使用50 mL扑热息痛溶液(100 mg.L -1)和0.75 g吸附剂的分批系统进行的(优化条件)。达到吸附平衡的时间为20分钟,其中CN550 AC的对乙酰氨基酚去除率为98.3%。拟二阶模型和Langmuir等温线最适合实验数据。酿酒行业的废物可以用作AC生产中的有机物,因为这项研究中扑热息痛的去除百分比表明CN550 AC具有很高的吸附效率和经济上可行的生产方法。

更新日期:2020-04-29
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