Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments

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Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments. / Bonaglia, Stefano; Rämö, Robert; Marzocchi, Ugo; Le Bouille, Léonie; Leermakers, Martine; Nascimento, Francisco J A; Gunnarsson, Jonas S.

In: Water Research, Vol. 148, 2019, p. 515-525.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Bonaglia, S, Rämö, R, Marzocchi, U, Le Bouille, L, Leermakers, M, Nascimento, FJA & Gunnarsson, JS 2019, 'Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments', Water Research, vol. 148, pp. 515-525. https://doi.org/10.1016/j.watres.2018.10.083

APA

Bonaglia, S., Rämö, R., Marzocchi, U., Le Bouille, L., Leermakers, M., Nascimento, F. J. A., & Gunnarsson, J. S. (2019). Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments. Water Research, 148, 515-525. https://doi.org/10.1016/j.watres.2018.10.083

CBE

Bonaglia S, Rämö R, Marzocchi U, Le Bouille L, Leermakers M, Nascimento FJA, Gunnarsson JS. 2019. Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments. Water Research. 148:515-525. https://doi.org/10.1016/j.watres.2018.10.083

MLA

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Author

Bonaglia, Stefano ; Rämö, Robert ; Marzocchi, Ugo ; Le Bouille, Léonie ; Leermakers, Martine ; Nascimento, Francisco J A ; Gunnarsson, Jonas S. / Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments. In: Water Research. 2019 ; Vol. 148. pp. 515-525.

Bibtex

@article{1b8e029c83ef4943acdfb67c40b7832c,
title = "Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments",
abstract = "Sediment capping with activated carbon (AC) is an effective technique used in remediation of contaminated sediments, but the ecological effects on benthic microbial activity and meiofauna communities have been largely neglected. This study presents results from a 4-week experiment investigating the influence of two powdered AC materials (bituminous coal-based and coconut shell-derived) and one control material (clay) on biogeochemical processes and meiofauna in contaminated sediments. Capping with AC induced a 62-63{\%} decrease in denitrification and a 66-87{\%} decrease in dissimilatory nitrate reduction to ammonium (DNRA). Sediment porewater pH increased from 7.1 to 9.0 and 9.7 after addition of bituminous AC and biomass-derived AC, respectively. High pH (>8) persisted for at least two weeks in the bituminous AC and for at least 24 days in the coconut based AC, while capping with clay had no effect on pH. We observed a strong impact (nitrate fluxes being halved in presence of AC) on nitrification activity as nitrifiers are sensitive to high pH. This partly explains the significant decrease in nitrate reduction rates since denitrification was almost entirely coupled to nitrification. Total benthic metabolism estimated by sediment oxygen uptake was reduced by 30 and 43{\%} in presence of bituminous coal-based AC and coconut shell-derived AC, respectively. Meiofauna abundances decreased by 60-62{\%} in the AC treatments. Taken together, these observations suggest that AC amendments deplete natural organic carbon, intended as food, to heterotrophic benthic communities. Phosphate efflux was 91{\%} lower in presence of bituminous AC compared to untreated sediment probably due to its content of aluminum (Al) oxides, which have high affinity for phosphate. This study demonstrates that capping with powdered AC produces significant effects on benthic biogeochemical fluxes, microbial processes and meiofauna abundances, which are likely due to an increase in porewater pH and to the sequestration of natural, sedimentary organic matter by AC particles.",
author = "Stefano Bonaglia and Robert R{\"a}m{\"o} and Ugo Marzocchi and {Le Bouille}, L{\'e}onie and Martine Leermakers and Nascimento, {Francisco J A} and Gunnarsson, {Jonas S}",
note = "Copyright {\circledC} 2018 The Authors. Published by Elsevier Ltd.. All rights reserved.",
year = "2019",
doi = "10.1016/j.watres.2018.10.083",
language = "English",
volume = "148",
pages = "515--525",
journal = "Water Research",
issn = "0043-1354",
publisher = "I W A Publishing",

}

RIS

TY - JOUR

T1 - Capping with activated carbon reduces nutrient fluxes, denitrification and meiofauna in contaminated sediments

AU - Bonaglia, Stefano

AU - Rämö, Robert

AU - Marzocchi, Ugo

AU - Le Bouille, Léonie

AU - Leermakers, Martine

AU - Nascimento, Francisco J A

AU - Gunnarsson, Jonas S

N1 - Copyright © 2018 The Authors. Published by Elsevier Ltd.. All rights reserved.

PY - 2019

Y1 - 2019

N2 - Sediment capping with activated carbon (AC) is an effective technique used in remediation of contaminated sediments, but the ecological effects on benthic microbial activity and meiofauna communities have been largely neglected. This study presents results from a 4-week experiment investigating the influence of two powdered AC materials (bituminous coal-based and coconut shell-derived) and one control material (clay) on biogeochemical processes and meiofauna in contaminated sediments. Capping with AC induced a 62-63% decrease in denitrification and a 66-87% decrease in dissimilatory nitrate reduction to ammonium (DNRA). Sediment porewater pH increased from 7.1 to 9.0 and 9.7 after addition of bituminous AC and biomass-derived AC, respectively. High pH (>8) persisted for at least two weeks in the bituminous AC and for at least 24 days in the coconut based AC, while capping with clay had no effect on pH. We observed a strong impact (nitrate fluxes being halved in presence of AC) on nitrification activity as nitrifiers are sensitive to high pH. This partly explains the significant decrease in nitrate reduction rates since denitrification was almost entirely coupled to nitrification. Total benthic metabolism estimated by sediment oxygen uptake was reduced by 30 and 43% in presence of bituminous coal-based AC and coconut shell-derived AC, respectively. Meiofauna abundances decreased by 60-62% in the AC treatments. Taken together, these observations suggest that AC amendments deplete natural organic carbon, intended as food, to heterotrophic benthic communities. Phosphate efflux was 91% lower in presence of bituminous AC compared to untreated sediment probably due to its content of aluminum (Al) oxides, which have high affinity for phosphate. This study demonstrates that capping with powdered AC produces significant effects on benthic biogeochemical fluxes, microbial processes and meiofauna abundances, which are likely due to an increase in porewater pH and to the sequestration of natural, sedimentary organic matter by AC particles.

AB - Sediment capping with activated carbon (AC) is an effective technique used in remediation of contaminated sediments, but the ecological effects on benthic microbial activity and meiofauna communities have been largely neglected. This study presents results from a 4-week experiment investigating the influence of two powdered AC materials (bituminous coal-based and coconut shell-derived) and one control material (clay) on biogeochemical processes and meiofauna in contaminated sediments. Capping with AC induced a 62-63% decrease in denitrification and a 66-87% decrease in dissimilatory nitrate reduction to ammonium (DNRA). Sediment porewater pH increased from 7.1 to 9.0 and 9.7 after addition of bituminous AC and biomass-derived AC, respectively. High pH (>8) persisted for at least two weeks in the bituminous AC and for at least 24 days in the coconut based AC, while capping with clay had no effect on pH. We observed a strong impact (nitrate fluxes being halved in presence of AC) on nitrification activity as nitrifiers are sensitive to high pH. This partly explains the significant decrease in nitrate reduction rates since denitrification was almost entirely coupled to nitrification. Total benthic metabolism estimated by sediment oxygen uptake was reduced by 30 and 43% in presence of bituminous coal-based AC and coconut shell-derived AC, respectively. Meiofauna abundances decreased by 60-62% in the AC treatments. Taken together, these observations suggest that AC amendments deplete natural organic carbon, intended as food, to heterotrophic benthic communities. Phosphate efflux was 91% lower in presence of bituminous AC compared to untreated sediment probably due to its content of aluminum (Al) oxides, which have high affinity for phosphate. This study demonstrates that capping with powdered AC produces significant effects on benthic biogeochemical fluxes, microbial processes and meiofauna abundances, which are likely due to an increase in porewater pH and to the sequestration of natural, sedimentary organic matter by AC particles.

U2 - 10.1016/j.watres.2018.10.083

DO - 10.1016/j.watres.2018.10.083

M3 - Journal article

VL - 148

SP - 515

EP - 525

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -