Anaerobic dissolved As(III) removal from metalpolluted waters by cathode-stabilized Fe(III)- oxyhydroxides.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00571472" target="_blank" >RIV/60077344:_____/23:00571472 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/23:43907569 RIV/00025798:_____/23:10168739

Result on the web

<a href="https://pubs.rsc.org/en/content/articlelanding/2023/EW/D2EW00844K" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2023/EW/D2EW00844K</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d2ew00844k" target="_blank" >10.1039/d2ew00844k</a>

Result language

angličtina

Original language name

Anaerobic dissolved As(III) removal from metalpolluted waters by cathode-stabilized Fe(III)- oxyhydroxides.

Original language description

A bioelectrochemical system (BES) to efficiently induce arsenite scavenging from anoxic waters is yet to be developed. Here we examined to what extent the presence of redox reactive humic substances derivatives and reactive nitrogen species interferes with the bioelectrochemically induced immobilization of As(iii) by Fe(iii) oxyhydroxides. Insights from extracellular electron transfer to insoluble minerals by a strain of Geobacter sp. were acquired and integrated with data from acetate utilization. We furthered our interpretations with in situ synchrotron-based analyses of experimentally precipitated biominerals. Geobacter sp. cells interacting with cathodes used oxidized humic substance derivatives as electron shuttles which fostered the partial reduction of Fe(iii), thus promoting the scavenging of As(iii) oxyanions. The oxyanions became immobilized in the reactive surfaces of FeOOH within mineral aggregates, where they were readily oxidized presumably as the result of related Fenton-like reactions. An experiment lacking humic derivatives fueled the formation of bacterial-mineral networks. These networks fostered short-range electron transfer mechanisms that initially promoted biotic amorphous ferrihydrite aggregation. The early ferrihydrite aggregates exhibited a decreased As(iii) scavenging capacity. In the presence of both humic derivatives and ammonium, the proposed BES was proven more effective in removing As(iii) from solution and despite elevated competing phosphate levels. In the presence of reactive N species alone, stabilization of Fe(iii) and microbial attachment promoted Fe(ii) scavenging which outcompeted As(iii) from the available ligands in the reactive mineral surfaces. Improving mineral stabilization is deemed crucial for direct As(iii)-sequestration in BESs. An optimized BES for As-removal would be beneficial not only for sequestering arsenite out of solution in geogenically polluted aqueous systems, but also for addressing the recurrent eutrophication of continental water bodies linked to seasonal phosphate solubilization.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10503 - Water resources

Project

<a href="/en/project/GJ19-15096Y" target="_blank" >GJ19-15096Y: Microbially induced iron, nitrogen and phosphorus co-recycling and transient decoupling in aqueous ferruginous ecosystems</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Environmental Science-Water Research & Technology

ISSN

2053-1400

e-ISSN

2053-1419

Volume of the periodical

9

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

454-466

UT code for WoS article

000897894400001

EID of the result in the Scopus database

2-s2.0-85144807061