Evidence map›Paper›PMID 39679007›Full record

ArticleWater research X2025

An inconvenient impact: Unveiling the overlooked differences in crystalline forms of iron (hydro)oxides on anaerobic digestion.

Han-Quan Wen, Guan-Lin Chen, Yu-Sheng Li, Tian Tian, Yuan Pan, Han-Qing Yu

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Article in Water research X, 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. Article
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

6 authors.

Han-Quan WenCAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Technology, University of Science and Technology of China, Hefei 230026, China.
Guan-Lin ChenCAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Technology, University of Science and Technology of China, Hefei 230026, China.
Yu-Sheng LiCAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Technology, University of Science and Technology of China, Hefei 230026, China.
Tian TianKey Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Yuan PanCAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Technology, University of Science and Technology of China, Hefei 230026, China.
Han-Qing YuCAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Technology, University of Science and Technology of China, Hefei 230026, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Iron (hydro)oxides are commonly used to enhance anaerobic digestion due to their cost-effectiveness and versatility. However, the influence of crystalline structure on digestion performance is often overlooked despite their unique characteristics. In this study, we investigated how different crystalline forms of FeOOH affect substrate utilization, sludge activity, and the microbiomes in up-flow anaerobic sludge blanket (UASB) reactors. The crystalline structure of FeOOH impacted reactor performance, with γ-FeOOH, β-FeOOH, and α-FeOOH showing decreasing effectiveness, as reflected in chemical oxygen demand (COD) removal efficiencies of 99.0 %, 98.3 % and 97.1 %, respectively. FeOOH crystals influenced the secretion of extracellular polymeric substances (EPS) and sludge activity by releasing Fe ions at varying rates, leading to Fe accumulation in EPS in the order of β-FeOOH > γ-FeOOH > α-FeOOH. Additionally, γ-FeOOH supported the most stable microbial community structure, as indicated by the highest Alpha diversity index. This stability was associated with increased levels of

Indexed as

Anaerobic digestioncrystalline formEPSFeOOHMetagenome

Identifiers

PMID39679007
PMCPMC11638638

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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.