2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University HWRBRB pmi-16224 https://pmi.spmi.ru/pmi/article/view/16224 Геотехнология и инженерная геология Geotechnical Engineering and Engineering Geology Acid mine water treatment using neutralizer with adsorbent material Очистка кислотных шахтных сточных вод нейтрализацией с использованием адсорбента Tumialán Pablo Espinoza Тумиалан П. Эспиноза Tumialán Pablo Espinoza darana@continental.edu.pe 0000-0002-5031-0993 Административный центр Серро – С.А.К – Волкан (Лима, Перу) Empresa Administradora Cerro S.A.C – Volcan (Lima, Peru) Martinez Nelida Tantavilca Мартинес Н. Тантавилка Martinez Nelida Tantavilca ntantavilca@continental.edu.pe 0000-0002-9988-2941 Университет Континенталь (Уанкайо, Перу) Universidad Continental (Huancayo, Peru) Hinostroza Clara Barreto Хиностроза К. Баррето Hinostroza Clara Barreto darana@continental.edu.pe 0009-0006-9987-7823 Университет Континенталь (Уанкайо, Перу) Universidad Continental (Huancayo, Peru) Arana Ruedas Del Piero R. Руэдас Д.П.Р. Арана Arana Ruedas Del Piero R. darana@continental.edu.pe 0000-0002-3682-5405 Университет Континенталь (Уанкайо, Россия) Universidad Continental (Huancayo, Russia) 15 12 2023 2024 267 381 387 11 04 2023 25 10 2023 04 07 2024 © 2023 П. Эспиноза Тумиалан, Н. Тантавилка Мартинес, К. Баррето Хиностроза, Д.П.Р. Арана Руэдас © 2023 Pablo Espinoza Tumialán, Nelida Tantavilca Martinez, Clara Barreto Hinostroza, Del Piero R. Arana Ruedas 2023 П. Эспиноза Тумиалан, Н. Тантавилка Мартинес, К. Баррето Хиностроза, Д.П.Р. Арана Руэдас Pablo Espinoza Tumialán, Nelida Tantavilca Martinez, Clara Barreto Hinostroza, Del Piero R. Arana Ruedas Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/16224

Одной из существенных проблем в горно-добывающем секторе является кислотный дренаж шахт, особенно на заброшенных и действующих шахтах, где должным образом не контролируется качество сброса воды. Степень удаления растворенных металлов меди, железа, свинца и цинка в дренаже кислых шахт была исследована путем применения различных пропорций смесей на основе нейтрализующего реагента гашеной извести с содержанием 67 % оксида кальция (CaO) с адсорбирующим материалом – природным бентонитом натрия по сравнению с применением нейтрализующего реагента без смешивания, обычно используемого при нейтрализации кислых горных стоков. Полученные результаты показывают, что степень удаления растворенных металлов из дренажа кислых шахт при обработке смесью нейтрализующего реагента и адсорбирующего материала в определенной пропорции достигает качества сброса, соответствующего экологическому стандарту (предельно допустимый уровень) при более низком рН, чем при нанесении нейтрализующего материала без смешивания, что свидетельствует о чистом снижении нейтрализующего агента на 1 кг/м3 кислотного шахтного дренажа. Кроме того, осадок, образующийся при обработке смесью нейтрализующего реагента с адсорбирующим материалом, обладает лучшими характеристиками, чем обычный осадок без бентонита, поскольку он больше подходит для использования в качестве укрывного материала, снижая степень поверхностной инфильтрации воды в нанесенный осадок.

One of the biggest issues in the mining sector is due to acid mine drainage, especially in those abandoned mining operations and active ones that fail to adequately control the quality of their water discharge. The removal degree of copper, iron, lead, and zinc dissolved metals in acid mine drainage was investigated by applying different proportions of mixtures based on neutralizing reagent hydrated lime at 67 % calcium oxide (CaO), with adsorbent material – natural sodium bentonite, compared to the application of neutralizing reagent without mixing, commonly used in the neutralization of acid mining drainage. The obtained results show that the removal degree of dissolved metals in acid mine drainage when treated with a mixture of neutralizing reagent and adsorbent material in a certain proportion, reaches discharge quality, complying with the environmental standard (Maximum Permissible Limit), at a lower pH than when neutralizing material is applied without mixing, registering a net decrease in the consumption unit of neutralizing agent express on 1 kg/m3 of acid mine drainage. Furthermore, the sludge produced in the treatment with a mixture of the neutralizing reagent with adsorbent material has better characteristics than common sludge without bentonite, since it is more suitable for use as cover material, reducing the surface infiltration degree of water into the applied deposit.

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