Activated carbons are well-known porous materials as an effective adsorbent used for the removal of emerging contaminants, such as herbicides, which are increasingly present in water bodies. Most water treatment plants, specially in Brazil, are unable to completely remove such contaminants by the conventional process and advanced treatment using activated carbons is required. The aim of this paper was to verify the influence of the activated carbons granulometry and specific surface area on the 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide removal efficiency using distilled-deionized water and filtered water collected from a conventional Water Treatment Plant. Commercial activated carbons samples used in this work were obtained from two different manufacturers. Activated carbons were analyzed by the specific surface area, pore size and volume distribution, nuclear magnetic resonance, infrared and x-ray spectroscopy, moisture, volatile matter and ash contents. Batch adsorption isotherms experiments were used and performed by Langmuir and Freundlich models. Granular and powdered activated carbons removed over 99% of 2,4-D in distilled water and near to 99% using filtered water. The activated carbons evaluated in this work presented high performance and played a key role in water treatment by removing 2,4-D herbicide, ensuring the protection of human health and the ecosystem.

中文翻译：

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使用颗粒状和粉末状活性炭从水中去除2,4-二氯苯氧基乙酸（2,4-D）微污染物除草剂：水处理和健康安全方面的比较。

活性炭是众所周知的多孔材料，可作为有效的吸附剂，用于去除水体中越来越多的新兴污染物（例如除草剂）。大多数水处理厂，特别是在巴西，无法通过常规方法完全去除此类污染物，因此需要使用活性炭进行深度处理。本文的目的是使用蒸馏去离子水和从常规水收集的过滤水验证活性炭粒度和比表面积对2,4-二氯苯氧基乙酸（2,4-D）除草剂去除效率的影响。处理厂。用于这项工作的商业活性炭样品是从两个不同的制造商处获得的。通过比表面积分析活性炭，孔径和体积分布，核磁共振，红外和X射线光谱，水分，挥发性物质和灰分。使用批量吸附等温线实验，并由Langmuir和Freundlich模型进行。颗粒状和粉末状活性炭在蒸馏水中除去了99％的2,4-D，并用过滤水除去了近99％。在这项工作中评估的活性炭具有很高的性能，并通过去除2,4-D除草剂在水处理中发挥了关键作用，从而确保了对人类健康和生态系统的保护。在蒸馏水中使用4-D，并使用过滤水将其接近99％。在这项工作中评估的活性炭具有很高的性能，并通过去除2,4-D除草剂在水处理中发挥了关键作用，从而确保了对人类健康和生态系统的保护。在蒸馏水中使用4-D，并使用过滤水将其接近99％。在这项工作中评估的活性炭具有很高的性能，并通过去除2,4-D除草剂在水处理中发挥了关键作用，从而确保了对人类健康和生态系统的保护。