Methods to determine the reducing capacity of dissolved organic matter in Boom Clay pore water

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Methods to determine the reducing capacity of dissolved organic matter in Boom Clay pore water. / Bleyen, Nele; Hendrix, Katrien; Vasile, Mirela; Valcke, Elie; Jacops, Elke (Peer reviewer); Mariën, An.

Studiecentrum voor Kernenergie, 2016. 56 p. (SCK•CEN Reports; No. ER-283).

Research output: Report/bookER - External report

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@book{5953f23b63264fb8b86997bc63377ba3,
title = "Methods to determine the reducing capacity of dissolved organic matter in Boom Clay pore water",
abstract = "To study the effect of nitrate and nitrite on the reducing capacity of dissolved organic matter (DOM) in Boom Clay pore water, two methods to determine this reducing capacity have been developed and evaluated. These two methods are based on the oxidation of DOM in real Boom Clay Water (RBCW) either by ferricyanide or by ferric citrate. When ferricyanide is used as oxidant, the reducing capacity of oxidisable DOM in RBCW ranges from 3.4 to 6.1 meq/gC. For ferric citrate as oxidant, lower values of the reducing capacity of DOM in RBCW are obtained, ranging from 0.8 to 1.3 meq/gC, mainly due to its lower standard redox potential compared to ferricyanide. As these methods would be applied to investigate whether a possible redox reaction between DOM and nitrate or nitrite would cause a significant change in reducing capacity of DOM in Boom Clay, the sensitivity of both methods to nitrate and/or nitrite (and azide as microbial inhibitor) was investigated. Finally, a ‘proof of principle’ test indicated that both methods can be applied to detect changes in reducing capacity of DOM due to oxidation.",
keywords = "Boom Clay, Eurobitum, dissolved organic matter, pore water",
author = "Nele Bleyen and Katrien Hendrix and Mirela Vasile and Elie Valcke and Elke Jacops and An Mari{\"e}n",
note = "Score=2",
year = "2016",
month = "9",
day = "1",
language = "English",
series = "SCK•CEN Reports",
publisher = "Studiecentrum voor Kernenergie",
number = "ER-283",

}

RIS - Download

TY - BOOK

T1 - Methods to determine the reducing capacity of dissolved organic matter in Boom Clay pore water

AU - Bleyen, Nele

AU - Hendrix, Katrien

AU - Vasile, Mirela

AU - Valcke, Elie

AU - Mariën, An

A2 - Jacops, Elke

N1 - Score=2

PY - 2016/9/1

Y1 - 2016/9/1

N2 - To study the effect of nitrate and nitrite on the reducing capacity of dissolved organic matter (DOM) in Boom Clay pore water, two methods to determine this reducing capacity have been developed and evaluated. These two methods are based on the oxidation of DOM in real Boom Clay Water (RBCW) either by ferricyanide or by ferric citrate. When ferricyanide is used as oxidant, the reducing capacity of oxidisable DOM in RBCW ranges from 3.4 to 6.1 meq/gC. For ferric citrate as oxidant, lower values of the reducing capacity of DOM in RBCW are obtained, ranging from 0.8 to 1.3 meq/gC, mainly due to its lower standard redox potential compared to ferricyanide. As these methods would be applied to investigate whether a possible redox reaction between DOM and nitrate or nitrite would cause a significant change in reducing capacity of DOM in Boom Clay, the sensitivity of both methods to nitrate and/or nitrite (and azide as microbial inhibitor) was investigated. Finally, a ‘proof of principle’ test indicated that both methods can be applied to detect changes in reducing capacity of DOM due to oxidation.

AB - To study the effect of nitrate and nitrite on the reducing capacity of dissolved organic matter (DOM) in Boom Clay pore water, two methods to determine this reducing capacity have been developed and evaluated. These two methods are based on the oxidation of DOM in real Boom Clay Water (RBCW) either by ferricyanide or by ferric citrate. When ferricyanide is used as oxidant, the reducing capacity of oxidisable DOM in RBCW ranges from 3.4 to 6.1 meq/gC. For ferric citrate as oxidant, lower values of the reducing capacity of DOM in RBCW are obtained, ranging from 0.8 to 1.3 meq/gC, mainly due to its lower standard redox potential compared to ferricyanide. As these methods would be applied to investigate whether a possible redox reaction between DOM and nitrate or nitrite would cause a significant change in reducing capacity of DOM in Boom Clay, the sensitivity of both methods to nitrate and/or nitrite (and azide as microbial inhibitor) was investigated. Finally, a ‘proof of principle’ test indicated that both methods can be applied to detect changes in reducing capacity of DOM due to oxidation.

KW - Boom Clay

KW - Eurobitum

KW - dissolved organic matter

KW - pore water

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/19961962

M3 - ER - External report

T3 - SCK•CEN Reports

BT - Methods to determine the reducing capacity of dissolved organic matter in Boom Clay pore water

PB - Studiecentrum voor Kernenergie

ER -

ID: 1512555