Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China

Discharge of acid mine drainage (AMD) from abandoned coal mines of the YuDong catchment in Kaili City, Guizhou Province, China, has severely damaged local ecological environments. In this study, a laboratory-scale dispersed alkaline substrate (DAS) was studied for the treatment of simulated AMD. The...

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Autores principales:	Li Wenbo, Feng Qiyan, Liang Haoqian, Chen Di, Li Xiangdong
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	acid mine drainage dispersed alkaline substrate heavy metal packing optimization passive treatment technique Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/45c00a7b26064e82bc80730a496eb3b2
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spelling	oai:doaj.org-article:45c00a7b26064e82bc80730a496eb3b22021-11-06T11:26:20ZPassive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China0273-12231996-973210.2166/wst.2021.405https://doaj.org/article/45c00a7b26064e82bc80730a496eb3b22021-10-01T00:00:00Zhttp://wst.iwaponline.com/content/84/8/1981https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Discharge of acid mine drainage (AMD) from abandoned coal mines of the YuDong catchment in Kaili City, Guizhou Province, China, has severely damaged local ecological environments. In this study, a laboratory-scale dispersed alkaline substrate (DAS) was studied for the treatment of simulated AMD. The experimental conditions and reaction mechanisms were preliminarily explored. The treatment effect and variation law of vertical effluent water quality of the experimental conditions were thoroughly analysed. The results indicated that small-sized limestone (diameter 5–7 mm) having a 20:1 mixture ratio with shavings and minimum HRT of 20 hours result in increasing effluent pH from 3.5 to 6.6, achieving 66.2% and 99.1% removal of Fe and Al, respectively. There were obvious differences in each reaction layer for the removal of various pollutants from AMD along the depth by DAS, the main reaction zone was first 20–30 cm of the reaction column. The removal process of metal ions and sulfate was accompanied by bio-mineralization reaction. This test provided a valuable support for the local practical engineering applications, enriched the AMD processing technology experimental cases, and provided reference for the treatment technology of similar polluted areas. HIGHLIGHTS A dispersed alkaline substrate was designed to treat the acid mine drainage from abandoned coal mines of YuDong valley, which provides a reference for the further design of site device and other similar contaminated areas.; Combining the physical and chemical parameters of the effluent, and mineralogical characterization of the filler along with the microbial diversity of the system, the mechanism of DAS treatment of AMD was analyzed.; Under this experiment conditions, DAS can raise the effluent pH to 6.6, and the average removal rate of Fe and Al was 66.2% and 99.1%, respectively. Daily decrease rate of Fe was 16∼18 g/m2/d.;Li WenboFeng QiyanLiang HaoqianChen DiLi XiangdongIWA Publishingarticleacid mine drainagedispersed alkaline substrateheavy metalpacking optimizationpassive treatment techniqueEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 8, Pp 1981-1996 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acid mine drainage dispersed alkaline substrate heavy metal packing optimization passive treatment technique Environmental technology. Sanitary engineering TD1-1066
spellingShingle	acid mine drainage dispersed alkaline substrate heavy metal packing optimization passive treatment technique Environmental technology. Sanitary engineering TD1-1066 Li Wenbo Feng Qiyan Liang Haoqian Chen Di Li Xiangdong Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China
description	Discharge of acid mine drainage (AMD) from abandoned coal mines of the YuDong catchment in Kaili City, Guizhou Province, China, has severely damaged local ecological environments. In this study, a laboratory-scale dispersed alkaline substrate (DAS) was studied for the treatment of simulated AMD. The experimental conditions and reaction mechanisms were preliminarily explored. The treatment effect and variation law of vertical effluent water quality of the experimental conditions were thoroughly analysed. The results indicated that small-sized limestone (diameter 5–7 mm) having a 20:1 mixture ratio with shavings and minimum HRT of 20 hours result in increasing effluent pH from 3.5 to 6.6, achieving 66.2% and 99.1% removal of Fe and Al, respectively. There were obvious differences in each reaction layer for the removal of various pollutants from AMD along the depth by DAS, the main reaction zone was first 20–30 cm of the reaction column. The removal process of metal ions and sulfate was accompanied by bio-mineralization reaction. This test provided a valuable support for the local practical engineering applications, enriched the AMD processing technology experimental cases, and provided reference for the treatment technology of similar polluted areas. HIGHLIGHTS A dispersed alkaline substrate was designed to treat the acid mine drainage from abandoned coal mines of YuDong valley, which provides a reference for the further design of site device and other similar contaminated areas.; Combining the physical and chemical parameters of the effluent, and mineralogical characterization of the filler along with the microbial diversity of the system, the mechanism of DAS treatment of AMD was analyzed.; Under this experiment conditions, DAS can raise the effluent pH to 6.6, and the average removal rate of Fe and Al was 66.2% and 99.1%, respectively. Daily decrease rate of Fe was 16∼18 g/m2/d.;
format	article
author	Li Wenbo Feng Qiyan Liang Haoqian Chen Di Li Xiangdong
author_facet	Li Wenbo Feng Qiyan Liang Haoqian Chen Di Li Xiangdong
author_sort	Li Wenbo
title	Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China
title_short	Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China
title_full	Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China
title_fullStr	Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China
title_full_unstemmed	Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China
title_sort	passive treatment test of acid mine drainage from an abandoned coal mine in kaili guizhou, china
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/45c00a7b26064e82bc80730a496eb3b2
work_keys_str_mv	AT liwenbo passivetreatmenttestofacidminedrainagefromanabandonedcoalmineinkailiguizhouchina AT fengqiyan passivetreatmenttestofacidminedrainagefromanabandonedcoalmineinkailiguizhouchina AT lianghaoqian passivetreatmenttestofacidminedrainagefromanabandonedcoalmineinkailiguizhouchina AT chendi passivetreatmenttestofacidminedrainagefromanabandonedcoalmineinkailiguizhouchina AT lixiangdong passivetreatmenttestofacidminedrainagefromanabandonedcoalmineinkailiguizhouchina
_version_	1718443664350380032

Passive treatment test of acid mine drainage from an abandoned coal mine in Kaili Guizhou, China

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