将工业生物质废弃物作为具有经济潜力的吸附剂去除污水中的俾斯麦棕 R 染料和锌金属离子

IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL
Sivamani Sivalingam and Sowmiya A.
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引用次数: 0

摘要

在这项研究中,利用化学活化法从枣籽(DS)生物质中制备了有效的活性炭(AC),用于去除水中的俾斯麦棕 R(BBR)染料和锌金属离子。制备出的活性炭通过 TGA、SEM 和 BET 进行表征,以了解其多孔碳的表面和孔隙结构,这些都是去除有机和无机污染物的重要特性。选择复杂的 DS 来制备 AC,是因为它们能产生硬质活性炭,在填料床和流化床吸附塔中性能更好。活性炭在 45、55 和 65 摄氏度的不同温度下制备,并进行了染料和锌离子去除测试。研究了完成批量吸附过程的各种参数,如溶液 pH 值、初始浓度(10-50 毫克/升)、接触时间(0-240 分钟)和温度(30-60 摄氏度)。朗缪尔等温线研究发现,活性炭对染料的最大单层吸附量为 192.31 毫克/克,对金属离子的最大单层吸附量为 15.55 毫克/克。伪二阶动力学模型和埃洛维奇动力学模型与数据的拟合效果最好。颗粒扩散模型表明,吸附受膜扩散和孔隙扩散的控制。热力学结果表明,染料吸附具有内热性质,而金属离子吸附具有放热性质。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Industrial biomass waste as an economical, potential adsorbent for removing the Bismarck Brown R dye and zinc metal ions from effluents†

Industrial biomass waste as an economical, potential adsorbent for removing the Bismarck Brown R dye and zinc metal ions from effluents†

In this research, activated carbon (AC) was prepared from date seed (DS) biomass using a chemical activation method for the removal of the Bismarck Brown R (BBR) dye and zinc metal ions from water. As-prepared AC was characterized using thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) analysis for understanding the porous carbon surface and pore structure, which are essential properties for removing organic and inorganic pollutants. DSs are complex and were selected to prepare AC as they can yield hard activated carbon and perform better in packed-bed and fluidized-bed adsorption columns. AC samples were prepared at different soaking temperatures, specifically at 45 °C, 55 °C, and 65 °C, and subsequently tested for the removal of both the BBR dye and Zn ions. Various parameters were studied to complete the batch adsorption process, including solution pH, initial concentration (BBR: 100–500 mg L−1; Zn ions: 10–50 mg L−1), contact time (0–240 min), and temperature (30–60 °C). The maximum monolayer adsorption capacity for BBR and Zn metal ions were found to be 192.31 mg g−1 and 15.55 mg g−1, respectively. The data was most accurately described by the pseudo-second-order and Elovich kinetics models. Analysis using the particle diffusion model indicated that both film-diffusion and pore-diffusion mechanisms governed adsorption. Thermodynamic assessments revealed the endothermic behavior of BBR dye adsorption and the exothermic behavior of Zn metal ion adsorption.

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