In this research work, isolation of humic acid from coal of Northeastern region of India is reported. The study is also targeted for application of the coal-derived humic acid in acid mine drainage (AMD) water treatment and electrochemical devices. All the obtained results are compared with the standard humic acid and examined the formation of humic acid from the coal. The isolated coal-derived humic acid is found to be high degree of humifications and relatively stable up to about 200 °C. The FTIR study indicates the formation of metal-humic acid complexes. On treatment with acidic water (AMD), the coal-derived humic acid was found to have the ability to remove toxic metal such as (in order) Pb > Cu > Zn > Cd. In addition, the preliminary electrochemical properties of the isolated humic acid are also discussed in the paper. The specific capacitance of the isolated coal-derived humic acid via cyclic voltammetry and charge-discharge analysis is found to be 7 mF/g at scan rate 10 mV/s and 22 mF/g within the potential window 0.4 V, respectively. The charge-discharge cycles are stable for more than 1000 cycles within the potential window 0.4 V. This study will create a new pathway for the further research in this field.

在这项研究工作中，报道了从印度东北地区的煤中分离腐殖酸。该研究还针对煤衍生的腐植酸在酸性矿山排水 (AMD) 水处理和电化学装置中的应用。所有获得的结果都与标准腐植酸进行了比较，并检查了煤中腐植酸的形成。发现分离出的煤衍生的腐植酸具有高度腐殖化并且在高达约 200°C 时相对稳定。FTIR 研究表明金属-腐殖酸复合物的形成。在用酸性水 (AMD) 处理后，发现煤衍生的腐殖酸具有去除有毒金属的能力，例如（按顺序）Pb > Cu > Zn > Cd。此外，本文还讨论了分离出的腐植酸的初步电化学性质。通过循环伏安法和充放电分析发现，分离的煤衍生腐植酸的比电容在 0.4 V 电位窗口内的扫描速率为 10 mV/s 和 22 mF/g 时分别为 7 mF/g。在0.4 V的电位窗口内，充放电循环稳定超过1000次。该研究将为该领域的进一步研究开辟一条新途径。