This paper investigates the potential use of anthracite coal to remove Fe, Mn, UV254, and colour from pre-ozonated groundwater using batch experiment studies. Pre-ozonated groundwater samples were prepared in a laboratory to present the actual characteristics of groundwater samples. General characteristics for anthracite, as well as for groundwater samples, were examined. The influences of anthracite dosage, pH, agitation speed, and contact time on the reduction of tested parameters were discussed. Also, three adsorption isotherms (Langmuir, Freundlich, and Temkin), as well as kinetics models, were evaluated. Results demonstrated that the maximum removal of Fe (67%) occurred at 100 g of anthracite dosage, and no significant removal of Mn was observed. In addition, anthracite was capable of removing UV254 and colour using a dosage of 100 g. However, the maximum removal efficiency of colour was 76% using the same anthracite dosage of 100 g. The optimum shaking speed of 300 rpm resulted in the maximum removal efficiency of all parameters. The optimum pH was 7, which resulted in the maximum removal efficiency of Fe (40%), Mn (7%), UV254 (43%), and colour (50%). The optimum contact time was 90 min for all parameters with a dosage of 100 g which resulted in the removal efficiency of 54%, 52%, and 70% for Fe, Mn, UV254, and colour. The adsorption and kinetics models were well fitted with the experimental results. Overall, this study demonstrated that anthracite could be a good practical option for groundwater treatment. The strong iron (Fe) and manganese (Mn) concentrations; is one of the big groundwater issues, causing reddish and blackish in the groundwater. Batch experimental works have been undertaken to investigate the applicability of anthracite as an alternative adsorbent to remove Fe, Mn, UV254, and colour from pre-ozonated groundwater. The application of ozone alone was less effective to remove these pollutants. At the optimum pH value of 7 and 90 minutes of contact time, the adsorption and kinetics models were fit well with the experimental results. The study demonstrated that ozonation with anthracite could be a good practical option for groundwater treatment.

中文翻译：

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使用无烟煤从预臭氧化地下水中去除 Fe、Mn、UV254 和颜色的有效性

本文通过批量实验研究了无烟煤从预臭氧化地下水中去除 Fe、Mn、UV254 和颜色的潜在用途。预臭氧化地下水样品是在实验室中制备的，以展示地下水样品的实际特征。检查了无烟煤和地下水样品的一般特征。讨论了无烟煤用量、pH、搅拌速度和接触时间对测试参数降低的影响。此外，还评估了三个吸附等温线（Langmuir、Freundlich 和 Temkin）以及动力学模型。结果表明，铁的最大去除率 (67%) 发生在 100 g 无烟煤剂量时，没有观察到显着的 Mn 去除。此外，无烟煤使用 100 g 的剂量就能够去除 UV254 和颜色。然而，使用相同的无烟煤用量 100 g 时，颜色的最大去除效率为 76%。300 rpm 的最佳振荡速度导致所有参数的最大去除效率。最佳 pH 值为 7，这导致 Fe (40%)、Mn (7%)、UV254 (43%) 和颜色 (50%) 的最大去除效率。对于所有参数，最佳接触时间为 90 分钟，用量为 100 g，这导致 Fe、Mn、UV254 和颜色的去除效率分别为 54%、52% 和 70%。吸附和动力学模型与实验结果非常吻合。总的来说，这项研究表明，无烟煤可能是地下水处理的一个很好的实用选择。强铁 (Fe) 和锰 (Mn) 浓度；是地下水的重大问题之一，导致地下水呈红色和黑色。已经进行了批量实验工作来研究无烟煤作为替代吸附剂从预臭氧化地下水中去除 Fe、Mn、UV254 和颜色的适用性。单独使用臭氧去除这些污染物的效果较差。在接触时间为 7 和 90 分钟的最佳 pH 值下，吸附和动力学模型与实验结果非常吻合。该研究表明，无烟煤臭氧化可能是地下水处理的一个很好的实用选择。吸附和动力学模型与实验结果非常吻合。该研究表明，无烟煤臭氧化可能是地下水处理的一个很好的实用选择。吸附和动力学模型与实验结果非常吻合。该研究表明，无烟煤臭氧化可能是地下水处理的一个很好的实用选择。