Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland

This study demonstrated the successful use of a laboratory-scale baffled horizontal constructed wetland substituted with mixed organic media for zinc removal from high acidity (∼610 mg L−1 as CaCO3), sulfate-rich (∼1,300 mg L−1) wastewater. The wetland was planted with Typha latifolia. The mean zinc...

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Autores principales:	Shweta Singh, Saswati Chakraborty
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	biomass activity bioremediation constructed wetlands microbial identification phytoremediation zinc pollution Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/602b6d2b4bc84d49bff6cb2a3100d60e
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spelling	oai:doaj.org-article:602b6d2b4bc84d49bff6cb2a3100d60e2021-12-02T07:41:38ZZinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland0273-12231996-973210.2166/wst.2021.477https://doaj.org/article/602b6d2b4bc84d49bff6cb2a3100d60e2021-11-01T00:00:00Zhttp://wst.iwaponline.com/content/84/10-11/3403https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732This study demonstrated the successful use of a laboratory-scale baffled horizontal constructed wetland substituted with mixed organic media for zinc removal from high acidity (∼610 mg L−1 as CaCO3), sulfate-rich (∼1,300 mg L−1) wastewater. The wetland was planted with Typha latifolia. The mean zinc concentration in the influent was gradually increased from 0.56 ± 0.02 mg L−1 to 5.3 ± 0.42 mg L−1. The mean zinc concentration in the outflow was 0.22 ± 0.19 mg L−1, which accounted for 95% zinc removal throughout the study. However, total zinc uptake by the plants was 533 mg kg−1, accounting for only 1.2% of total zinc removal; therefore, major zinc retention occurred within wetland media (83%). The overall activity and specific sulfidogenic activity decreased at the end of the study to 1.43 mg chemical oxygen demand removed per mg of TVS per day and 0.60 mg sulfate reduced per mg of TVS per day, respectively. Additionally, 16S rRNA sequencing revealed major dominant phyla present: Firmicutes (36%), Proteobacteria (16%), Actinobacteria (8.8%), Planctomycetes (7.8%), Chloroflexi (3.5%), Acidobacteria (1.9%) and Fibrobacteres (1.5%). HIGHLIGHTS Effective acidity removal with alkalinity generation (35–750 mg L−1 as CaCO3).; CW exhibited good zinc removal efficiency (92–95%), with >80% retention in media.; Zinc uptake by plants was 533 mg kg−1, accounting for only 1.2% of total zinc removal.; Specific sulfidogenic activity accounted for 0.60–0.83 mg sulfate reduced per mg of TVS per day.; Metagenomics revealed the dominance of Firmicutes (36%) and Proteobacteria (16%).;Shweta SinghSaswati ChakrabortyIWA Publishingarticlebiomass activitybioremediationconstructed wetlandsmicrobial identificationphytoremediationzinc pollutionEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 10-11, Pp 3403-3414 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomass activity bioremediation constructed wetlands microbial identification phytoremediation zinc pollution Environmental technology. Sanitary engineering TD1-1066
spellingShingle	biomass activity bioremediation constructed wetlands microbial identification phytoremediation zinc pollution Environmental technology. Sanitary engineering TD1-1066 Shweta Singh Saswati Chakraborty Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
description	This study demonstrated the successful use of a laboratory-scale baffled horizontal constructed wetland substituted with mixed organic media for zinc removal from high acidity (∼610 mg L−1 as CaCO3), sulfate-rich (∼1,300 mg L−1) wastewater. The wetland was planted with Typha latifolia. The mean zinc concentration in the influent was gradually increased from 0.56 ± 0.02 mg L−1 to 5.3 ± 0.42 mg L−1. The mean zinc concentration in the outflow was 0.22 ± 0.19 mg L−1, which accounted for 95% zinc removal throughout the study. However, total zinc uptake by the plants was 533 mg kg−1, accounting for only 1.2% of total zinc removal; therefore, major zinc retention occurred within wetland media (83%). The overall activity and specific sulfidogenic activity decreased at the end of the study to 1.43 mg chemical oxygen demand removed per mg of TVS per day and 0.60 mg sulfate reduced per mg of TVS per day, respectively. Additionally, 16S rRNA sequencing revealed major dominant phyla present: Firmicutes (36%), Proteobacteria (16%), Actinobacteria (8.8%), Planctomycetes (7.8%), Chloroflexi (3.5%), Acidobacteria (1.9%) and Fibrobacteres (1.5%). HIGHLIGHTS Effective acidity removal with alkalinity generation (35–750 mg L−1 as CaCO3).; CW exhibited good zinc removal efficiency (92–95%), with >80% retention in media.; Zinc uptake by plants was 533 mg kg−1, accounting for only 1.2% of total zinc removal.; Specific sulfidogenic activity accounted for 0.60–0.83 mg sulfate reduced per mg of TVS per day.; Metagenomics revealed the dominance of Firmicutes (36%) and Proteobacteria (16%).;
format	article
author	Shweta Singh Saswati Chakraborty
author_facet	Shweta Singh Saswati Chakraborty
author_sort	Shweta Singh
title	Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
title_short	Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
title_full	Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
title_fullStr	Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
title_full_unstemmed	Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
title_sort	zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/602b6d2b4bc84d49bff6cb2a3100d60e
work_keys_str_mv	AT shwetasingh zincremovalfromhighlyacidicandsulfaterichwastewaterinhorizontalsubsurfaceconstructedwetland AT saswatichakraborty zincremovalfromhighlyacidicandsulfaterichwastewaterinhorizontalsubsurfaceconstructedwetland
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Zinc removal from highly acidic and sulfate-rich wastewater in horizontal sub-surface constructed wetland

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