Organic matter content selectively binds specific trace metals in anaerobic digestate samples

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F25%3A43932589" target="_blank" >RIV/60461373:22320/25:43932589 - isvavai.cz</a>

Result on the web

<a href="http://bts.vscht.cz/sites/default/files/Bioprospect_3-4_2025_1.pdf" target="_blank" >http://bts.vscht.cz/sites/default/files/Bioprospect_3-4_2025_1.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Organic matter content selectively binds specific trace metals in anaerobic digestate samples

Original language description

Stable and effective anaerobic digestion necessitates bioavailable trace metals as crucial enzyme components. The degree to which these metals are bioavailable depends on their binding to various organic fractions within digestates. However, the role of these individual organic fractions in metal binding is poorly understood, especially the distinction based on size distribution. To show which fraction i.e., organic matter size, is significant for metal binding, we treated seven digestates from various full -scale anaerobic digestion plants by different ultrafiltration filters, namely 3 kDa molecular weight cutoff (MWCO), 10 kDa MWCO and 0.22 µm filters. In the resulting fractions (&lt; 3 kDa, 3-10 kDa, 10 kDa- 0.2 µm), we analyzed total organic carbon (TOC) and trace metals, including Mo, Mn, Co, Ni, Cu, Fe and Zn. The distribution of metals and organic matter was bimodal, i.e., the majority of metals and total organic carbon were found in two fractions, &lt; 3 kDa and 10 kDa- 0.2 µm. Overall, the influence of the feedstock on relative metal distribution was not substantial, resulting in the same metal being found in the similar percentage among different digestate samples. On the other hand, the feedstock appeared to have an effect on metal binding to organic matter: the samples with WWTP origin showed higher linear correlation than the samples originating from agricultural waste. Mn, Cu, Fe and Zn in WWTP samples showed to be impacted the most by organic matter size. These results gave an insight into the role of organic matter on trace metal binding in digestates.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

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Continuities

R - Projekt Ramcoveho programu EK

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Bioprospect

ISSN

1210-1737

e-ISSN

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Volume of the periodical

35

Issue of the periodical within the volume

3-4/2025

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

9

Pages from-to

51-59

UT code for WoS article

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EID of the result in the Scopus database

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