Fate of di (2‑ethylhexyl) phthalate in different soils and associated bacterial community changes

The Science of the Total Environment
Fengxiao ZhuJuan Gao

Abstract

Di (2‑ethylhexyl) phthalate (DEHP) is a ubiquitous organic pollutant, which has caused considerable pollution in arable soils. In this study, the relationship between DEHP degradation potential and soil properties in 12 agricultural soils (S1-S12) was examined in a microcosm based experiment. Six of these soils were then selected to monitor patterns in bacterial community responses. It was found that DEHP degradation was positively correlated with bacterial counts in the original soils, suggesting a key role for bacteria in degradation. However, DEHP metabolism did not always lead to complete degradation. Its monoester metabolite, mono (2‑ethylhexyl) phthalate (MEHP), was present at appreciable levels in the two acidic soils (S1 and S2) during the incubation period of 35 days. Based on high-throughput sequencing data, we observed a greater impact of DEHP contamination on bacterial community structure in acidic soils than in the other soils. Nocardioides, Ramlibacter and unclassified Sphingomonadaceae were enriched in the two near-neutral soils where degradation was highest (S4 and S7), suggesting that these organisms might be efficient degraders. The relative abundance of Tumibacillus was greatly reduced in 50% of the six soils...Continue Reading

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Citations

May 20, 2020·Bulletin of Environmental Contamination and Toxicology·Cui ZhangJun Wang
Jun 20, 2020·Bulletin of Environmental Contamination and Toxicology·Yuanyuan YanCheng Gu
Oct 10, 2020·The Science of the Total Environment·Ping WangSijie Zhou

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