Abfertiawan Muhammad Sonny, Palinggi Yoseph, Syafila Mindriany, Handajani Marisa, Pranoto Kris
Water and Wastewater Engineering Research Group, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology, Indonesia.
Environmental Department, Kaltim Prima Coal, Indonesia.
Heliyon. 2023 Jul 26;9(8):e18687. doi: 10.1016/j.heliyon.2023.e18687. eCollection 2023 Aug.
Static tests of acid mine drainage potential are an important part of mining water management. Net acid generation (NAG) test is widely used in Indonesian coal mines because of its convenience. This test uses HO to oxidize sulfide minerals within rock samples to determine their net acid-forming capacity. This study aimed to determine the difference between HO at concentrations of 7.5% (the standard in several Indonesian coal mines) and 15% (the standard of the Acid Rock Drainage Test Handbook and Indonesian National Standard) in categorizing rocks as potentially acid-forming and non-acid-forming and in terms of NAG solution characteristics. A total of 564 rock samples collected from two Indonesian coal mining sites were analyzed using pH, NAG, total sulfur, and acid-base-accounting tests. The results of the study showed that there was no significant difference in rock classification or the behavior of contaminants in the NAG solution between 7.5% and 15% HO. The characteristics of sulfide minerals in Indonesian coal mines were the main factors influencing the results of the NAG test and behavior of contaminants in the NAG solution. Therefore, HO at a concentration of 7.5% can be used in Indonesian coal mines with relatively low total sulfur concentrations (<5%) and minerals in framboidal form.
酸性矿山排水潜力的静态测试是采矿水管理的重要组成部分。净产酸量（NAG）测试因其便利性在印度尼西亚煤矿中被广泛使用。该测试使用过氧化氢来氧化岩石样品中的硫化物矿物，以确定它们的净产酸能力。本研究旨在确定浓度为7.5%（印度尼西亚一些煤矿的标准）和15%（《酸性岩石排水测试手册》和印度尼西亚国家标准的标准）的过氧化氢在将岩石分类为潜在产酸岩石和非产酸岩石以及在NAG溶液特性方面的差异。使用pH值、NAG、总硫和酸碱平衡测试对从印度尼西亚两个煤矿开采地点采集的总共564个岩石样品进行了分析。研究结果表明，7.5%和15%的过氧化氢在岩石分类或NAG溶液中污染物行为方面没有显著差异。印度尼西亚煤矿中硫化物矿物的特性是影响NAG测试结果和NAG溶液中污染物行为的主要因素。因此，浓度为7.5%的过氧化氢可用于总硫浓度相对较低（<5%）且矿物呈莓球状的印度尼西亚煤矿。
