Treatment of Acid Drainage from Coal Mines Produced in the Boyacá Region, Colombia, using an Anaerobic Wetland with an Upward Flow

Q4 Engineering

Ingenieria y Universidad Pub Date : 2022-07-12 DOI:10.11144/javeriana.iued26.tadc

Cesar René Blanco-Zuñiga, Zully Ximena Chacón-Rojas, Juan Sebastian Villarraga-Castillo, Heidy Elizabeth Guevara-Suarez, Yesica Nataly Casteblanco-Castro, N. Rojas-Arias

{"title":"Treatment of Acid Drainage from Coal Mines Produced in the Boyacá Region, Colombia, using an Anaerobic Wetland with an Upward Flow","authors":"Cesar René Blanco-Zuñiga, Zully Ximena Chacón-Rojas, Juan Sebastian Villarraga-Castillo, Heidy Elizabeth Guevara-Suarez, Yesica Nataly Casteblanco-Castro, N. Rojas-Arias","doi":"10.11144/javeriana.iued26.tadc","DOIUrl":null,"url":null,"abstract":"Coal mining represents one of the primary economic incomes in the department of Boyacá, Colombia. However, the acid mine drainage (AMD) generated has a tremendous environmental impact in the area due to the presence of sulfate ions (SO4-2), heavy metals, and low pH This article studies the behavior in the content of Fe and sulfates in AMD samples when treated within an artificial anaerobic vertical flow wetland, analyzing the concentration of these elementsand the content of dissolved oxygen (DO) and pH at different time intervals. The treatment of a MAD from the department of Boyacá was carried out using a bioreactor prototype with an organic substrate to provide the necessary conditions for the development of sulfate-reducing bacteria. Measurements were made with hydraulic retention times between 24 to 120 hours, monitoring the changes in the content of total Fe, SO4-2, pH, and DO. The data obtained show a reduction for total Fe of 88.3%, established at 5.61g∙m-2∙day-1, and for SO4-2 of 34.3% with 9.35g∙m-2∙day-1; reaching a maximum removal degree of 52.32% at 120h for sulfates and 92% for Fe, where the maximum removal peak is achieved, reducing the Fe removal rate for longer times. The reduction in the concentration of Fe is related to the reduction of DO and regulation of the pH, in addition to favoring the reduction of sulfate ions through the formation of the mineralogical phases pyrite and siderite. These data show that the anoxic conditions of the organic environment are maintained, for which a subsequent aeration stage is suggested.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"6 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ingenieria y Universidad","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.11144/javeriana.iued26.tadc","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Engineering","Score":null,"Total":0}

引用次数: 0

Abstract

Coal mining represents one of the primary economic incomes in the department of Boyacá, Colombia. However, the acid mine drainage (AMD) generated has a tremendous environmental impact in the area due to the presence of sulfate ions (SO4-2), heavy metals, and low pH This article studies the behavior in the content of Fe and sulfates in AMD samples when treated within an artificial anaerobic vertical flow wetland, analyzing the concentration of these elementsand the content of dissolved oxygen (DO) and pH at different time intervals. The treatment of a MAD from the department of Boyacá was carried out using a bioreactor prototype with an organic substrate to provide the necessary conditions for the development of sulfate-reducing bacteria. Measurements were made with hydraulic retention times between 24 to 120 hours, monitoring the changes in the content of total Fe, SO4-2, pH, and DO. The data obtained show a reduction for total Fe of 88.3%, established at 5.61g∙m-2∙day-1, and for SO4-2 of 34.3% with 9.35g∙m-2∙day-1; reaching a maximum removal degree of 52.32% at 120h for sulfates and 92% for Fe, where the maximum removal peak is achieved, reducing the Fe removal rate for longer times. The reduction in the concentration of Fe is related to the reduction of DO and regulation of the pH, in addition to favoring the reduction of sulfate ions through the formation of the mineralogical phases pyrite and siderite. These data show that the anoxic conditions of the organic environment are maintained, for which a subsequent aeration stage is suggested.

查看原文本刊更多论文

利用上向流厌氧湿地处理哥伦比亚boyac地区煤矿酸性废水

煤矿开采是哥伦比亚boyac省的主要经济收入之一。然而，由于硫酸盐离子(SO4-2)、重金属和低pH值的存在，酸性矿水(AMD)对该地区的环境造成了巨大的影响。本文研究了在人工厌氧垂直流湿地中处理AMD样品时铁和硫酸盐含量的变化，分析了不同时间间隔下这些元素的浓度以及溶解氧(DO)和pH的含量。采用有机基质生物反应器原型对boyacac系的一种MAD进行了处理，为硫酸盐还原菌的生长提供必要的条件。水力滞留时间为24至120小时，监测总Fe、SO4-2、pH和DO含量的变化。所获得的数据表明，总Fe降低了88.3%，达到5.61g∙m-2∙day-1, SO4-2降低了34.3%，达到9.35g∙m-2∙day-1;在120h时，硫酸盐和铁的最大去除率分别达到52.32%和92%，达到最大去除率峰，降低铁去除率的时间更长。铁浓度的降低除了有利于通过矿物学相黄铁矿和菱铁矿的形成还原硫酸盐离子外，还与DO的还原和pH的调节有关。这些数据表明，有机环境的缺氧条件得到了维持，因此建议进行后续曝气阶段。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ingenieria y Universidad Engineering-Engineering (all)

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： Our journal''s main objective is to serve as a medium for the diffusion and divulgation of the articles and investigations in the engineering scientific and investigative fields. All the documents presented as result of an investigation will be received, as well as any review about engineering, this includes essays that might contribute to the academic and scientific discussion of any of the branches of engineering. Any contribution to the subject related to engineering development, ethics, values, or its relations with policies, culture, society and environmental fields are welcome. The publication frequency is semestral.