The effect of aging time on the distribution of pyrene in soil particle-size fractions

Wei, Ran; Ni, Jinzhi; Lan, Guo-Cheng; Yang, Liuming; Yang, Yusheng

doi:10.1016/j.geoderma.2014.04.027

Cited by 21 publications

(13 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SOC is an important factor in influencing the distribution of organic pollutants in soil aggregates and is involved in pollutant immobilization and biodegradation (Amellal et al 2001;Gao et al 2013). In our study, the clay and coarse sand possessed relatively higher SOC contents relative to the fine sand and silt fractions, which result is in accordance with the result of Wei et al (2014). It is remarkable that the DBP or DEHP concentration is the highest in the clay fraction rather than the coarse sand fraction.…”

Section: Discussionsupporting

confidence: 81%

Application of modified attapulgite in phthalate acid ester-contaminated soil: Effects on phthalate acid ester dissipation and the composition of soil microbial community

Gao

Shi

Zhou³

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

The effects of modified attapulgite (MA) on the dissipations of the plasticizers di-n-butyl phthalate (DBP) and di-(2-ethylhexyl) phthalate (DEHP) in soil, as well as on the composition of soil microbial community, were studied. DBP, DEHP (50 mg kg −1 in soil, respectively), and MA (1, 5, and 10 % in soil) were mixed thoroughly with soil and incubated for 60 days. DBP-and DEHP-contaminated soils without MA were used as the controls. Both of DBP and DEHP residues in bulk soils and four soil fractions were measured at five incubation times 1, 7, 15, 30, and 60 days, and their dissipation kinetic equations were analyzed. The microbial phospholipid fatty acid (PLFA) concentrations were also measured at the end of experiment. Our results showed that the effect of modified attapulgite on DBP dissipation was related to its dosage in soil. The DEHP dissipation was both inhibited by MA at the 5 and 10 % rates in soils. The application of MA changed the content percentages but did not change the concentration order of phthalate acid esters (PAEs) in soil particlesize fractions. The total microbial PLFA content was significantly increased by 5 and 10 % MA in the contaminated soils. Meanwhile, the gram-negative (GN)/gram-positive (GP) ratios increased when MA was applied at the dosages of 5 and 10 % in DBP and 10 % in DEHP-contaminated soils. Principal component analysis (PCA) indicated that the change of bacteria PLFA, especially the GN bacterial PLFA, depended on the dosages of MA added into soil. The application of MA into soil has a positive effect on reducing the ecotoxicity of PAEs in soil based on the analysis of the soil microbial PLFA.

show abstract

Section: Discussionsupporting

confidence: 81%

Application of modified attapulgite in phthalate acid ester-contaminated soil: Effects on phthalate acid ester dissipation and the composition of soil microbial community

Gao

Shi

Zhou³

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…15−18 Furthermore, the affinity of OM to soil varies among the different size fractions, e.g., the affinity of OM bound to silt is generally higher than that bound to clay. 19,20 Therefore, compared with traditional sorption experiments, which combine all soil size fractions in the same sample, sorption experiments using soil size fractions are more beneficial to understand the sorption of pollutants to soil and can provide more useful information for determining which soil fraction is mainly responsible for the total sorption, and the mechanism controlling the sorption contribution among the different size fractions. 18,21 Many studies on the sorption of organic pollutants to particle-size fractions of soils and sediments have been conducted.…”

Section: ■ Introductionmentioning

confidence: 99%

“…18,21 Many studies on the sorption of organic pollutants to particle-size fractions of soils and sediments have been conducted. [16][17][18]20,21 However, there were almost focused on polycyclic aromatic hydrocarbons (PAHs) or endocrine disrupting chemicals (EDCs), with few investigations of recalcitrant organic pollutants such as PFOA and PFOS. Considering the large differences in physicochemical properties between PFOA (ionic, hydro-oleophobic, and recalcitrant) and PAHs or EDCs (lipophilic and biodegradable), 13,16,17 the sorption and distribution of PFOA to soil particle-size fractions urgently needs to be investigated.…”

Section: ■ Introductionmentioning

confidence: 99%

Mechanism and Implication of the Sorption of Perfluorooctanoic Acid by Varying Soil Size Fractions

Xiang

Xiao

et al. 2018

J. Agric. Food Chem.

View full text Add to dashboard Cite

Sorption of perfluorooctanoic acid (PFOA), a toxic and persistent organic pollutant, by various size fractions of an agricultural soil at environmentally relevant concentrations was evaluated. PFOA sorption to all fractions involved both film diffusion and intraparticle diffusion with the rate-limiting step by the latter. PFOA isotherm data fitted a linear model. Organic matter (OM), cation exchange capacity, pore volume, and the Brunauer−Emmett−Teller area played key roles in PFOA sorption. The sorption capacity followed the order of humic acid > clay (0.15−4.4 mm) > fine silt (1.9−39.8 mm) > coarse silt (17.3−79.4 mm) > fine sand (45.7−316.2 mm) > coarse sand (120−724.4 mm), opposite to their contributions to overall PFOA sorption due to the influence of their percentage weight in the original soil. Percentage OM content was the dominant factor controlling the fraction contributions to overall PFOA sorption, demonstrating influence of the hydrophobic force on sorption. PFOA should be highly mobile and bioavailable in soil-crop systems due to the low log K oc values.

show abstract

“…F2000R 7F2000R (14) F2000R 21F2000R 28 metabolic activity and they are key to the degradation of the pollutant [33], it would be expected that any change in these variables affect the effectiveness of the technique. It is documented that during the phytoremediation process, large changes occur in the availability of the contaminant and the structure of the microbial community that affect the degradation kinetics of the contaminant [34]. As observed in the PCA, diversity and richness are negatively correlated with the concentration of phenanthrene (− 0.85); therefore, changes at the community level are expected as the concentration of phenanthrene varies over time.…”

Section: Concentraɵon Of Phenanthrenementioning

confidence: 96%

Changes in microbial communities during phytoremediation of contaminated soil with phenanthrene

2020

View full text Add to dashboard Cite

Although polycyclic aromatic hydrocarbons (PAHs) are environmental pollutants that affect negatively soils biology, several strategies lead to their removal such as the phytoremediation. In order to assess the potential of phytoremediation using "alfalfa" Medicago sativa as a strategy to reduce the phenanthrene on the soil, we analyzed the structure and dynamic of the microbial communities of a microcosm soil artificially contaminated with phenanthrene (2000 ppm), which was exposed to the plants. At different incubation times (7, 14, 21, 28, 42, and 56 days), a soil sample was taken from each microcosm and the residual amount of phenanthrene was quantified. Dehydrogenase activity and the count of fungi and bacteria were also estimated. Bacterial communities were characterized using PCR-DGGE, Shannon and Weaver's indexes, multivariate analysis, and rarefaction curves. It was found that phytoremediation treatment was associated with a higher richness and bacterial diversity compared with those on control soil. Although an OTUs (Operational Taxonomic Unit) succession over time was detected in both treatments, bacterial richness and diversity were conditioned by the phenanthrene concentration available and also dependent on the treatment, which were associated to different bacterial communities. In this study, phytoremediation treatment reduced the content of phenanthrene in the soil after 56 days to a 0.45% compared with the control treatment, which only reached to 4.25%. This preliminary work suggests the promoting activity of "alfalfa" plants, through rhizodegradation, to remove in soil PAHs, as well as its relevance in the activation of different ecological processes mediated by soil microorganisms.

show abstract

The effect of aging time on the distribution of pyrene in soil particle-size fractions

Cited by 21 publications

References 45 publications

Application of modified attapulgite in phthalate acid ester-contaminated soil: Effects on phthalate acid ester dissipation and the composition of soil microbial community

Application of modified attapulgite in phthalate acid ester-contaminated soil: Effects on phthalate acid ester dissipation and the composition of soil microbial community

Mechanism and Implication of the Sorption of Perfluorooctanoic Acid by Varying Soil Size Fractions

Changes in microbial communities during phytoremediation of contaminated soil with phenanthrene

Contact Info

Product

Resources

About