Zinc recovery from bioleachate using a microbial electrolysis cell and comparison with selective precipitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00131805" target="_blank" >RIV/00216224:14310/23:00131805 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3389/fmicb.2023.1238853" target="_blank" >https://doi.org/10.3389/fmicb.2023.1238853</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fmicb.2023.1238853" target="_blank" >10.3389/fmicb.2023.1238853</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Zinc recovery from bioleachate using a microbial electrolysis cell and comparison with selective precipitation

Popis výsledku v původním jazyce

Metal recycling is essential for strengthening a circular economy. Microbial leaching (bioleaching) is an economical and environmentally friendly technology widely used to extract metals from insoluble ores or secondary resources such as dust, ashes, and slags. On the other hand, microbial electrolysis cells (MECs) would offer an energy-efficient application for recovering valuable metals from an aqueous solution. In this study, we investigated a MEC for Zn recovery from metal-laden bioleachate for the first time by applying a constant potential of -100mV vs. Ag/AgCl (3M NaCl) on a synthetic wastewater-treating bioanode. Zn was deposited onto the cathode surface with a recovery efficiency of 41 +/- 13% and an energy consumption of 2.55 kWh kg(-1). For comparison, Zn recovery from zinc sulfate solution resulted in a Zn recovery efficiency of 100 +/- 0% and an energy consumption of 0.70 kWh kg(-1). Furthermore, selective metal precipitation of the bioleachate was performed. Individual metals were almost completely precipitated from the bioleachate at pH 5 (Al), pH 7 (Zn and Fe), and pH 9 (Mg and Mn).

Název v anglickém jazyce

Zinc recovery from bioleachate using a microbial electrolysis cell and comparison with selective precipitation

Popis výsledku anglicky

Metal recycling is essential for strengthening a circular economy. Microbial leaching (bioleaching) is an economical and environmentally friendly technology widely used to extract metals from insoluble ores or secondary resources such as dust, ashes, and slags. On the other hand, microbial electrolysis cells (MECs) would offer an energy-efficient application for recovering valuable metals from an aqueous solution. In this study, we investigated a MEC for Zn recovery from metal-laden bioleachate for the first time by applying a constant potential of -100mV vs. Ag/AgCl (3M NaCl) on a synthetic wastewater-treating bioanode. Zn was deposited onto the cathode surface with a recovery efficiency of 41 +/- 13% and an energy consumption of 2.55 kWh kg(-1). For comparison, Zn recovery from zinc sulfate solution resulted in a Zn recovery efficiency of 100 +/- 0% and an energy consumption of 0.70 kWh kg(-1). Furthermore, selective metal precipitation of the bioleachate was performed. Individual metals were almost completely precipitated from the bioleachate at pH 5 (Al), pH 7 (Zn and Fe), and pH 9 (Mg and Mn).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10608 - Biochemistry and molecular biology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Frontiers in Microbiology

ISSN

1664-302X

e-ISSN

1664-302X

Svazek periodika

14

Číslo periodika v rámci svazku

August 2023

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

001058992900001

EID výsledku v databázi Scopus

2-s2.0-85169617844