Abstract A proprietary adsorbent material called Nyex 1000 was developed by the Arvia Technology Ltd. (UK based waste water treatment company). Nyex 1000 was being employed for a number of commercial applications dealing with the removal of organic contaminants from industrial effluents. This adsorbent material had small adsorptive capacity. With the aim to address small adsorptive capacity, a new graphite based adsorbent material was developed. The particle design was accomplished through successive chemical, thermal and mechanical treatments of raw graphite material (natural large flake graphite, to be called here as NLFG). The chemical treatment of the NLFG was carried out through electrochemical intercalation using dilute (50%) sulfuric acid in an electrochemical cell. Chemically treated NLFG then went through thermal treatment at 850 °C and followed by mechanical treatments consisting of compression (4536 kgf cm−2) and chopping at 18,000 rpm for 30 s. The developed adsorbent material, (exfoliated compacted graphite, to be called here as ECG) and NLFG were characterized using state of the art techniques including SEM, BET surface area, XRD, Zeta potential, Boehm surface titration, bed electrical conductivity and laser size analysis. The characterization results showed significant increase in internal specific surface area from 1 to 17 m2 g−1. It was attributed to the development of partially porous particle surface verified by SEM results. The XRD, Boehm surface titration, Zeta potential results endorsed the associated chemical and physical changes appeared in the composition of the NLFG as a result of chemical, thermal and mechanical treatments. Adsorption-regeneration studies were conducted using developed ECG and existing Nyex 1000 materials. The pollutants used for adsorption–regeneration studies were acid violet 17, phenol, humic acid, ethane thiol and methyl propane thiol dissolved in aqueous solution. The results were compared and it was found that ECG showed significantly improved adsorption capacity with many folds. Both adsorbent materials, ECG and Nyex 1000 delivered 100% electrochemical regeneration efficiencies.

中文翻译：

---

新开发的碳质吸附剂的吸附-再生性能对比

摘要 Arvia Technology Ltd.（英国废水处理公司）开发了一种名为 Nyex 1000 的专有吸附材料。Nyex 1000 被用于处理从工业废水中去除有机污染物的许多商业应用。该吸附材料的吸附容量小。为了解决吸附容量小的问题，开发了一种新的石墨基吸附材料。颗粒设计是通过对原始石墨材料（天然大鳞片石墨，在此称为 NLFG）的连续化学、热处理和机械处理来完成的。NLFG 的化学处理是通过在电化学电池中使用稀 (50%) 硫酸的电化学插层进行的。化学处理的 NLFG 然后在 850 °C 下进行热处理，然后进行机械处理，包括压缩 (4536 kgf cm−2) 和以 18,000 rpm 的速度切碎 30 秒。开发的吸附材料（剥离致密石墨，在此称为 ECG）和 NLFG 使用最先进的技术进行表征，包括 SEM、BET 表面积、XRD、Zeta 电位、Boehm 表面滴定、床电导率和激光尺寸分析. 表征结果显示内部比表面积从 1 到 17 m2 g-1 显着增加。这归因于 SEM 结果验证的部分多孔颗粒表面的发展。XRD、Boehm 表面滴定、Zeta 电位结果证实了 NLFG 组成中出现的相关化学和物理变化，这是由于化学、热处理和机械处理。吸附再生研究是使用开发的心电图和现有的 Nyex 1000 材料进行的。用于吸附-再生研究的污染物是溶解在水溶液中的酸性紫 17、苯酚、腐植酸、乙硫醇和甲基丙硫醇。对结果进行了比较，发现心电图的吸附能力显着提高了许多倍。两种吸附材料 ECG 和 Nyex 1000 均提供 100% 的电化学再生效率。对结果进行了比较，发现心电图的吸附能力显着提高了许多倍。两种吸附材料 ECG 和 Nyex 1000 均提供 100% 的电化学再生效率。对结果进行了比较，发现心电图的吸附能力显着提高了许多倍。两种吸附材料 ECG 和 Nyex 1000 均提供 100% 的电化学再生效率。