利用粒状活性炭过滤进行海水淡化的预处理系统:亚甲基蓝案例

IF 2.2 4区 化学 Q2 Engineering Chemical Papers Pub Date : 2024-10-28 DOI:10.1007/s11696-024-03759-x
Nadia Chekir, Djilali Tassalit, Naima Sahraoui, Ouassila Benhabiles, Hacina Abchiche, Zahia Tigrine, Farah Karima Rabehi, Lilia Lamani, Mohamed Trari, Seif El Islam Lebouachera
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引用次数: 0

摘要

使用反渗透技术(RO)进行海水淡化,为解决世界许多地区的缺水问题带来了巨大希望。然而,膜结垢是这方面的一个重大障碍,因为它会降低产水的质量和数量,增加能耗,需要清洗,并缩短膜的寿命。将颗粒活性炭(GAC)吸附与超滤(UF)结合使用作为预处理,可确保高质量的海水进入海水淡化工艺,而不含可能损害工厂的污染物。这种方法可以提高设备的效率和使用寿命,降低维护成本,并为各种应用生产出高质量的海水淡化水。在这项研究中,GAC 是用市售木炭制成的,用于去除海水中的有机化合物、重金属和微生物污染物。为确定 GAC 去除亚甲基蓝 (MB) 的效果,进行了一项初步研究。在甲基溴初始浓度分别为 50 毫克/升和 10 毫克/升时,去除效率分别为 78% 和 99%。等温线模型证实,吸附过程遵循 Langmuir 模型。此外,动力学研究表明,甲基溴在 GAC 上的吸附遵循伪二阶模型。GAC 过滤去除了 99% 以上的 COD,并显著降低了 Zn、Cu 和 Cd 等金属的浓度。对经 GAC 处理的海水进行的细菌学分析表明,总大肠菌群和粪大肠菌群以及粪链球菌显著减少,这表明了 GAC/吸附过滤系统的功效。
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Pre-treatment system using granulated activated carbon filtration for seawater desalination: methylene blue case

The use of reverse osmosis (RO) for desalination holds great promise for addressing water scarcity issues in many parts of the world. However, membrane fouling is a significant impediment in this regard, as it reduces the quality and quantity of water produced, increases energy consumption, requires cleaning, and shortens membrane life. The use of granular activated carbon (GAC) adsorption in conjunction with ultrafiltration (UF) as a pre-treatment ensures that high-quality seawater enters the desalination process free of contaminants that could harm the plant. This method increases the efficiency and longevity of the equipment, lowers maintenance costs, and produces high-quality desalinated water for a variety of applications. In this study, GAC was made from commercially available charcoal and used to remove organic compounds, heavy metals, and microbiological contaminants from seawater. A preliminary study was conducted to determine GAC’s effectiveness in removing methylene blue (MB). The removal efficiency was found to be 78 and 99% at initial MB concentrations of 50 and 10 mg/L, respectively. The isotherm modeling confirms that the adsorption process follows the Langmuir model. In addition, the kinetic study demonstrated that MB adsorption on GAC follows the pseudo-second-order model. GAC filtration removed more than 99% of COD and significantly reduced metal concentrations such as Zn, Cu, and Cd. Bacteriological analysis of seawater treated with GAC revealed a significant reduction in total and fecal coliforms, as well as fecal streptococci, indicating the efficacy of the GAC/adsorption filtration system.

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来源期刊
Chemical Papers
Chemical Papers Chemical Engineering-General Chemical Engineering
CiteScore
3.30
自引率
4.50%
发文量
590
期刊介绍: Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.
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