Evidence map›Paper›PMID 39915603›Full record

ArticleScientific reports2025

Synergistic recovery of Pr, Eu, and Ce from gold mine tailings using bioleaching and oxalic acid pretreatment.

Hoda Fereydouni, Tannaz Naseri, Seyyed Mohammad Mousavi

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Hoda FereydouniBiotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
Tannaz NaseriBiotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
Seyyed Mohammad MousaviBiotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran. mousavi_m@modares.ac.ir.

Funding

Tarbiat Modares University IG-39701
6 · The paper itself

Abstract

Mining activities produce a significant amount of gold mine tailings (GMT) rich in rare earth elements. Despite this, little information is available regarding the effective extraction of these precious elements from GMT. We describe a novel strategy for removing Pr, Ce, and Eu from GMT using Acidithiobacillus thiooxidans combined with a pretreatment step. For the pretreatment, GMT was exposed to 2 M oxalic acid for 6 h at 90 °C and 500 rpm at a liquid-to-solid ratio of 60 mL/g, which selectively removed iron and enhanced rare earth element bioavailability. As a result, GMT powder was introduced during the logarithmic growth phase of A. thiooxidans to maximize the bacterial activity and acid production during bioleaching. Surface modifications revealed by structural analysis validated the progress of the bioleaching procedure. Based on kinetic modeling, it was determined that chemical reactions determined the rate-limiting stage. The results showed a notable improvement in the recovery of rare earth elements after iron removal, with recovery of Pr, Ce, and Eu increasing by 24.4%, 14.4%, and 9.1%, respectively. A promising approach to resource recovery in mining operations could be achieved by integrating pretreatment and bioleaching for enhancing the recovery of rare earth elements from GMT.

Indexed as

EuropiumGoldMetals, Rare EarthMiningOxalic AcidAcidithiobacillusBiodegradation, EnvironmentalIronEuropiumGoldIronMetals, Rare EarthOxalic AcidAcidithiobacillus thiooxidansBioleachingGold mine tailingOxalic acidPretreatmentRare earths

Identifiers

PMID39915603
PMCPMC11803100

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.