Microbial degradation and impact of Bracken toxin ptaquiloside on microbial communities in soil

Engel, Pernille; Brandt, Kristian K.; Rasmussen, Lars Holm; Ovesen, Rikke Glerup; Sørensen, Jan

doi:10.1016/j.chemosphere.2006.08.025

Cited by 33 publications

(28 citation statements)

References 17 publications

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“…Ptaquiloside has been detected twice in Danish well water [20]. Ptaquiloside content in bracken varies and is detected at concentrations up to 42,000 μg/g, with the highest content being found in crosiers [4,21,22]. The highest PTA content ever reported was measured in fronds growing on the clayey soil used in the present study, which equaled an annual production and potential PTA load to soil of 20 g/m 2 [4].…”

Section: Introductionmentioning

confidence: 83%

“…Pollution of groundwater and surface waters can be abated if the toxins are degraded or sorbed during transport through the soil matrix to aquifers or other recipients. In most cases, plant toxins degrade quickly in soil, with half‐lives in the range of days [4–7]. Currently, few studies have examined toxins in terrestrial environments, but soil clay silicates seem to be important sorbents, as observed, for instance, for the mycotoxins zearalenone and ochratoxin A and for the carcinogenic afla‐toxins [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Degradation kinetics of ptaquiloside in soil and soil solution

Ovesen

Rasmussen²,

Hansen

2008

Enviro Toxic and Chemistry

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Ptaquiloside (PTA) is a carcinogenic norsesquiterpene glycoside produced in bracken (Pteridium aquilinum (L.) Kuhn), a widespread, aggressive weed. Transfer of PTA to soil and soil solution eventually may contaminate groundwater and surface water. Degradation rates of PTA were quantified in soil and soil solutions in sandy and clayey soils subjected to high natural PTA loads from bracken stands. Degradation kinetics in moist soil could be fitted with the sum of a fast and a slow first-order reaction; the fast reaction contributed 20 to 50% of the total degradation of PTA. The fast reaction was similar in all horizons, with the rate constant k(1F) ranging between 0.23 and 1.5/h. The slow degradation, with the rate constant k(1S) ranging between 0.00067 and 0.029/ h, was more than twice as fast in topsoils compared to subsoils, which is attributable to higher microbial activity in topsoils. Experiments with sterile controls confirmed that nonmicrobial degradation processes constituted more than 90% of the fast degradation and 50% of the slow degradation. The lower nonmicrobial degradation rate observed in the clayey compared with the sandy soil is attributed to a stabilizing effect of PTA by clay silicates. Ptaquiloside appeared to be stable in all soil solutions, in which no degradation was observed within a period of 28 d, in strong contrast to previous studies of hydrolysis rates in artificial aqueous electrolytes. The present study predicts that the risk of PTA leaching is controlled mainly by the residence time of pore water in soil, soil microbial activity, and content of organic matter and clay silicates.

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Degradation kinetics of ptaquiloside in soil and soil solution

Ovesen

Rasmussen²,

Hansen

2008

Enviro Toxic and Chemistry

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“…Anaerobic treatment presents a number of advantages, such as low nutrient requirements, low surplus sludge production, and ability to achieve a high degree of purification with high organic load feeds [2][3][4][5]. PTA wastewater was usually treated using aerobic activated sludge process [6][7][8]. Since the 1990s, anaerobic treatment methods have been gradually introduced in PTA wastewater treatment plants because of advantages, such as low energy requirement and lower surplus sludge production [9,10].…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of anaerobic fluidized bed reactors using brick beads and porous ceramics as support materials for treating terephthalic acid wastewater

Yun

Lü

Jiang

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThis study evaluated two different porous support materials (brick beads and porous ceramics) used in rapid mass-transfer anaerobic fluidized bed reactors (AFBRs) for treating terephthalic acid wastewater. The AFBRs, denoted as R1 (containing brick beads) and R2 (containing porous ceramics), were inoculated with anaerobic sludge. Results showed that the system organic loading rate increased from 7.37 kg COD/(m 3 d) to 18.52 kg COD/(m 3 d) over a period of 73 d. During the steady period, R2 showed better performance than R1. The chemical oxygen demand removal efficiency and total alkalinity removal efficiency of R1 were 65-75% and 60-70%, whereas those of R2 were 75-88% and 72-84%, respectively.

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“…8 PA can induce reproductive and developmental toxicity, as well as disrupt endocrine function. 13 The literature suggests that PTA wastewater is toxic to living organisms, 14,15 and the US Environmental Protection Agency recently added this class of chemicals to the list of priority pollutants. 10,11 Generally, BA reveals that the compound could affect the growth and reproduction of freshwater organisms, sperm viability, though it is not clinically considered as a reproductive or developmental toxicant.…”

Section: Introductionmentioning

confidence: 99%

Experimental and modeling study of pure terephthalic acid (PTA) wastewater transport in the vadose zone

Wang

Liu

Pei

et al. 2015

Environ. Sci.: Processes Impacts

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PTA wastewater discharged from a factory was selected as the research object in this project and CODcr was selected as the characteristic pollution factor. Static adsorption and soil column leaching experiments of silty clay and clayey soil were carried out to study the adsorption, bio-degradation and dispersion coefficient of CODcr in PTA wastewater. Hydrus-1D was used to build the convection-diffusion model to demonstrate the migration of PTA wastewater in the vadose zone. The results indicate that silty clay and clayey soil in the vadose zone can adsorb, degrade and impede the contaminants in PTA wastewater; however, the coefficient of adsorption and degradation were very low, they were down to 0.0002 L g(-1), 0.0003 L g(-1) and 0.0097 d(-1), 0.0077 d(-1) for silty clay and clayey soil, respectively. Under the virtual condition that, wastewater in the sewage pool is 5 m deep, CODcr concentration is 4000 mg L(-1), vadose zone is 21 m, PTA wastewater will reach the phreatic surface after 20.87 years. When wastewater in the sewage pool is 7 m with other conditions unchanged, after 17.18 years PTA wastewater will reach groundwater. The results show that there is a higher pollution risk for groundwater if we do not take any anti-seepage measures.

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Microbial degradation and impact of Bracken toxin ptaquiloside on microbial communities in soil

Cited by 33 publications

References 17 publications

Degradation kinetics of ptaquiloside in soil and soil solution

Degradation kinetics of ptaquiloside in soil and soil solution

Performance evaluation of anaerobic fluidized bed reactors using brick beads and porous ceramics as support materials for treating terephthalic acid wastewater

Experimental and modeling study of pure terephthalic acid (PTA) wastewater transport in the vadose zone

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