Acidified groundnut cake for enhanced bio adsorption of anionic textile dye Reactive Red 195.

IF 3.4 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Arpita Jayan, Aatika Nizam, Praveen Nagella, Vasantha Veerappa Lakshmaiah
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Abstract

This study focuses on the improvement of bioremediation of textile dye Reactive Red 195 using agro-industrial waste, groundnut oil cake (GNOC) obtained after oil-pressing. The treatment of GNOC with 1 N H2SO4 had resulted in physiochemical changes on the insoluble porous adsorbent, which improved their adsorption efficiency. The dye removal efficiency increased from 55% to 94% on acidification of GNOC. The raw groundnut oil cake (RGNOC) and acid-treated groundnut oil cake (AGNOC) were characterized using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction, and zeta potential. The rate and efficiency of dye adsorption were examined using adsorption kinetics and isotherm models. The results confirm that acid-treated GNOC eliminates impurities, alter the surface functional groups, and significantly increase porous surface areas of RGNOC. The investigation of key factors such as contact time, initial concentration of dye, static/agitation impact, particle size, and adsorbent dose had significantly influenced adsorption capacity of GNOC. Adsorption of dye fits best into the Langmuir model and equilibrium data of dye on AGNOC was explained by psuedo-second-order reaction with maximum adsorption capacity of 12.65 mg/g. This emphasis AGNOC has a very excellent potential to remove the textile dye Reactive Red dye from industrial effluent.

酸化花生饼用于增强阴离子纺织染料活性红 195 的生物吸附。
本研究的重点是利用农用工业废料、榨油后获得的花生油饼(GNOC)改善纺织染料活性红 195 的生物修复。用 1 N H2SO4 处理 GNOC 后,不溶性多孔吸附剂发生了物理化学变化,从而提高了吸附效率。GNOC 酸化后,染料去除率从 55% 提高到 94%。使用傅立叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、X 射线衍射和 zeta 电位对未加工的花生油饼(RGNOC)和酸处理的花生油饼(AGNOC)进行了表征。利用吸附动力学和等温线模型考察了染料的吸附速率和效率。结果证实,酸处理 GNOC 可去除杂质,改变表面官能团,并显著增加 RGNOC 的多孔表面积。接触时间、染料初始浓度、静态/搅拌影响、粒度和吸附剂剂量等关键因素对 GNOC 的吸附能力有显著影响。染料的吸附与 Langmuir 模型最为吻合,染料在 AGNOC 上的平衡数据由准二阶反应解释,最大吸附容量为 12.65 mg/g。这强调了 AGNOC 在去除工业废水中的纺织染料活性红染料方面具有非常出色的潜力。
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来源期刊
International Journal of Phytoremediation
International Journal of Phytoremediation 环境科学-环境科学
CiteScore
7.60
自引率
5.40%
发文量
145
审稿时长
3.4 months
期刊介绍: The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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