Column experiment reveals high natural attenuation potential for toluene in iron-rich aquifers but significant concomitant secondary Fe pollution risk.

Front Microbiol · 2025 · PMC12587300 · PMID 41199943

Europe PMC DOI

hedged sentence

—

closest p

—

boldest claim

The sentences

an increasing trendno p-value reported

However, the Fe 2+ concentration in T1 was significantly higher than that in T2 and showed an increasing trend.

also in 63,971 other papers

Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.