Effects of perfluorooctanoic acid (PFOA) on activated sludge microbial community under aerobic and anaerobic conditions

Huang, Duanyi; Xu, Rui; Sun, Xiaoxu; Li, Yongbin; Xiao, Enzong; Xu, Zhimin; Wang, Qi; Gao, Pin; Yang, Zhen; Lin, Hanzhi; Sun, Weimin

doi:10.1007/s11356-022-18841-8

Cited by 11 publications

(7 citation statements)

References 64 publications

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“…Previous studies have suggested that there is no conclusive evidence that PFOA can be degraded under aerobic conditions [25]. In contrast, Huang et al (2022) found that anaerobic bacteria could degrade PFOA and the removal rate of AD system reached 63% [26]. Meester et al ( 2004) compared the aerobic and anaerobic biodegradation of PFOA, with the conclusion that the aerobic process almost did not degrade, and the anaerobic process almost completely removed PFOA [27].…”

Section: Introductionmentioning

confidence: 99%

Insight into the Impacts and Removal Pathways of Perfluorooctanoic Acid (PFOA) in Anaerobic Digestion

Xie

Chen

Wang

et al. 2022

Water

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Perfluorooctanoic acid (PFOA) that accumulates in wastewater and excess sludge interact with the anaerobes and deteriorate the energy recovery and pollutants removal performance in the anaerobic digestion (AD) system. However, the interaction between PFOA and microbial metabolism in the AD systems remains unclear. This study aimed to clarify the effects and mechanism of PFOA on the AD process as well as the removal pathways of PFOA in an AD system. The results showed that the methane recovery efficiency was inhibited by 7.6–19.7% with the increased PFOA concentration of 0.5–3.0 mg/L, and the specific methanogenesis activity (SMA) was inhibited by 8.6–22.3%. The electron transfer system (ETS) was inhibited by 22.1–37.3% in the PFOA-containing groups. However, extracellular polymeric substance (EPS) gradually increased due to the toxicity of PFOA, and the ratio of protein to polysaccharide shows an upward trend, which led to the formation of sludge aggregates and resistance to the toxic of PFOA. The PFOA mass balance analysis indicated that 64.2–71.6% of PFOA was removed in the AD system, and sludge adsorption was the main removal pathway, accounting for 36.1–61.2% of the removed PFOA. In addition, the anaerobes are proposed to have the potential to reduce PFOA through biochemical degradation since 10.4–28.2% of PFOA was missing in the AD system. This study provides a significant reference for the treatment of high-strength PFOA-containing wastes.

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Section: Introductionmentioning

confidence: 99%

Insight into the Impacts and Removal Pathways of Perfluorooctanoic Acid (PFOA) in Anaerobic Digestion

Xie

Chen

Wang

et al. 2022

Water

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“…The adsorption capacity of TW substrates has been widely applied to assess their lifespan, which is usually limited by the low adsorption capacity of common substrates utilized, such as gravel, coarse, and sand. , IIRP amendment provided additional adsorption sites for As by taking advantage of the large specific area and strong binding affinity between As and Fe oxides. IIRP amendment increased the As(V) breakthrough time 7-fold, as calculated by As(V) adsorption capacity at an equilibrium As concentration of 50 μg L –1 (50% breakthrough).…”

Section: Discussionmentioning

confidence: 99%

Immobile Iron-Rich Particles Promote Arsenic Retention and Regulate Arsenic Biotransformation in Treatment Wetlands

Liu

Häggblom

et al. 2022

Environ. Sci. Technol.

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Remediation of arsenic (As)-contaminated wastewater by treatment wetlands (TWs) remains a technological challenge due to the low As adsorption capacity of wetland substrates and the release of adsorbed As to pore water. This study investigated the feasibility of using immobile iron-rich particles (IIRP) to promote As retention and to regulate As biotransformation in TWs. Iron-rich particles prepared were immobilized in the interspace of a gravel substrate. TWs with IIRP amendment (IIRP-TWs) achieved a stable As removal efficiency of 63 ± 4% over 300 days, while no As removal or release was observed in TWs without IIRP after 180 days of continuous operation. IIRP amendment provided additional adsorption sites and increased the stability of adsorbed As due to the strong binding affinity between As and Fe oxides. Microbially mediated As(III) oxidation was intensified by iron-rich particles in the anaerobic bottom layer of IIRP-TWs. Myxococcus and Fimbriimonadaceae were identified as As(III) oxidizers. Further, metagenomic binning suggested that these two bacterial taxa may have the capability for anaerobic As(III) oxidation. Overall, this study demonstrated that abiotic and biotic effects of IIRP contribute to As retention in TWs and provided insights into the role of IIRP for the remediation of As contamination.

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“…Concurrently, it has been observed that PFOA can also impede the expression of specific genes within microorganisms. PFOA has the potential to hinder gene expression associated with various processes, including amino acid metabolism, energy production, and transformation within sludge microorganisms . Whereas, Fe x S y (e.g., pyrite (FeS 2 ) and pyrrhotite (Fe 1– n S)) emerges with wide distribution in the Earth’s crust, exhibiting susceptibility to weathering processes .…”

Section: Introductionmentioning

confidence: 99%

“…PFOA has the potential to hinder gene expression associated with various processes, including amino acid metabolism, energy production, and transformation within sludge microorganisms. 20 Whereas, Fe x S y (e.g., pyrite (FeS 2 ) and pyrrhotite (Fe 1−n S)) emerges with wide distribution in the Earth's crust, exhibiting susceptibility to weathering processes. 21 In a realistic environment, the coexistence of Fe x S y and microorganisms is a common phenomenon, often leading to intricate and multifaceted interactions.…”

Section: Introductionmentioning

confidence: 99%

Dual Role of Microbe–Fe_xS_y Interaction to Drive Perfluorooctanoic Acid Multipath Chain Reaction Decay Cycles and Secondary Minerals-Ions (Fe²⁺/Fe³⁺) Transformation Cycles

Wang,

Zhang,

Fan

et al. 2024

ACS EST Water

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The coexistence of iron−sulfur minerals (Fe x S y ) and microorganisms is a common phenomenon, often leading to intricate interactions. Perfluorooctanoic acid (PFOA) presents extensive spatial−temporal attenuation characteristics. However, the mechanism governing PFOA in relevant diverse PFOA-ion occurrence environments remains unclear. In this study, the effects difference between microbe/Fe x S y and microbe−Fe x S y , and specific effects of four PFOA-ions environments on PFOA were investigated. Results showed a remarkable 277% increase in PFOA attenuation rate (λ) in microbe−Fe x S y media (0.343 h −1 ) than in Fe x S y (0.091 h −1 ) alone. The ion inhibiting effect on PFOA attenuation was demonstrated (λ from 0.343 to 0.159 h −1 ), with the maximum effect in HCO 3 − . It can be attributed to the occupation of sites by HCO 3− which led to a greater repulsion. More PFOA was dispersed into distant regions (low reaction zone). Moreover, SO 4 2− or NO 3 − with microbe−Fe x S y interaction exhibited pronounced retardation effects (on PFOA). Notably, enhanced formations of2− and PFOA-NO 3 − environments. Pseudomonas reduced Fe 3+ to Fe 2+ , and Rhizobiales contributed to producing 3 Fe 2+ after consuming 2 Fe 2+ . Fe 2+ and Pseudomonas combined to drive PFOA multipath chain reaction. This provided a theoretical basis for understanding PFOA cross-media transport and fate in microbe−mineral−ions interaction environments.

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Effects of perfluorooctanoic acid (PFOA) on activated sludge microbial community under aerobic and anaerobic conditions

Cited by 11 publications

References 64 publications

Insight into the Impacts and Removal Pathways of Perfluorooctanoic Acid (PFOA) in Anaerobic Digestion

Insight into the Impacts and Removal Pathways of Perfluorooctanoic Acid (PFOA) in Anaerobic Digestion

Immobile Iron-Rich Particles Promote Arsenic Retention and Regulate Arsenic Biotransformation in Treatment Wetlands

Dual Role of Microbe–Fe_xS_y Interaction to Drive Perfluorooctanoic Acid Multipath Chain Reaction Decay Cycles and Secondary Minerals-Ions (Fe²⁺/Fe³⁺) Transformation Cycles

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Effects of perfluorooctanoic acid (PFOA) on activated sludge microbial community under aerobic and anaerobic conditions

Cited by 11 publications

References 64 publications

Insight into the Impacts and Removal Pathways of Perfluorooctanoic Acid (PFOA) in Anaerobic Digestion

Insight into the Impacts and Removal Pathways of Perfluorooctanoic Acid (PFOA) in Anaerobic Digestion

Immobile Iron-Rich Particles Promote Arsenic Retention and Regulate Arsenic Biotransformation in Treatment Wetlands

Dual Role of Microbe–FexSy Interaction to Drive Perfluorooctanoic Acid Multipath Chain Reaction Decay Cycles and Secondary Minerals-Ions (Fe2+/Fe3+) Transformation Cycles

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Dual Role of Microbe–Fe_xS_y Interaction to Drive Perfluorooctanoic Acid Multipath Chain Reaction Decay Cycles and Secondary Minerals-Ions (Fe²⁺/Fe³⁺) Transformation Cycles