Competitive adsorption of phthalate esters on marine surface sediments: kinetic, thermodynamic, and environmental considerations

Mohammadian, Somaye; Ghanemi, Kamal; Nikpour, Yadollah

doi:10.1007/s11356-016-7723-9

Cited by 15 publications

(3 citation statements)

References 43 publications

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“…During the dry season, the DEHP concentration in the sediments had a significantly positive correlation with OM content ( r = 0.934, p < 0.01) and the proportion of fine grain ( r = 0.836, p < 0.01). The results suggest that both organic matter and grain size play a critical role in the DEHP distribution in sediments in the common case [ 6 , 37 , 51 , 60 , 61 ].…”

Section: Resultsmentioning

confidence: 99%

Spatial and Temporal Distribution of Di-(2-ethylhexyl) Phthalate in Urban River Sediments

Chen

Lim

et al. 2018

IJERPH

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This study investigated the spatial distribution of di-(2-ethylhexyl) phthalate (DEHP), and its potential biological effects, in the surface sediments that were collected from 10 sites at the Love River during dry and wet seasons. The grain size and organic matter were measured to understand the key factors that affect the distribution of DEHP concentrations in the sediments of Love River. The mean DEHP concentrations in the sediments that were collected during the wet and dry seasons were 28.6 ± 19.5 and 17.8 ± 11.6 mg/kg dry weight, respectively. The highest DEHP concentration was observed in the sediments that were sampled in the vicinity of the estuary. The correlation analysis showed that the grain size and organic matter may play a key role in the DEHP distribution in the sediments during the dry season, whereas the DEHP concentrations in the wet season may be mainly affected by other environmental and hydrological conditions. By a comparison with the sediment quality guidelines, the levels of DEHP in the sediments of Love River were found to have the potential to result in an adverse effect on aquatic benthic organisms. Specifically, during the wet season, wastewater from upstream of Love River is flushed downstream, causing a higher DEHP concentration in the sediments. Future pollution prevention and management objectives should move towards reducing the discharge of upstream wastewater and establishing a complete sewer system to reduce DEHP pollution in the environment.

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Section: Resultsmentioning

confidence: 99%

Spatial and Temporal Distribution of Di-(2-ethylhexyl) Phthalate in Urban River Sediments

Chen

Lim

et al. 2018

IJERPH

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“…Continuous emissions of PAEs have led to their ubiquitous distribution and abundance in the global environment. For example, PAEs have been determined in wastewater, river water, seawater, air, sediment, and fish. − Both atmospheric and aquatic transport pathways play an important role in the presence of PAEs in the marine environment. − When PAEs enter the marine environment, they can redistribute in different environmental compartments and exchange, crossing the interface between gas/particle, air/water, water/sediment, and water/organism. − Furthermore, it has been proven that sediments are important sinks and sources for PAE distribution and bioaccumulation in the marine environment. − Besides, photo- and biological degradation may interfere with their levels in the air and aquatic environments. , However, the transformed products of PAEs can be more toxic than their parent substances . Consequently, air–sea exchange processes may significantly interfere with the biogeochemical cycle of PAEs in the marine environment …”

Section: Introductionmentioning

confidence: 99%

“… 19 − 21 Furthermore, it has been proven that sediments are important sinks and sources for PAE distribution and bioaccumulation in the marine environment. 22 − 24 Besides, photo- and biological degradation may interfere with their levels in the air and aquatic environments. 25 , 26 However, the transformed products of PAEs can be more toxic than their parent substances.…”

Section: Introductionmentioning

confidence: 99%

Air–Sea Exchange and Atmospheric Deposition of Phthalate Esters in the South China Sea

Xie

et al. 2023

Environ. Sci. Technol.

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Phthalate esters (PAEs) have been investigated in paired air and seawater samples collected onboard the research vessel SONNE in the South China Sea in the summer of 2019. The concentrations of ∑7PAEs ranged from 2.84 to 24.3 ng/m3 with a mean of 9.67 ± 5.86 ng/m3 in air and from 0.96 to 8.35 ng/L with a mean of 3.05 ng/L in seawater. Net air-to-seawater deposition dominated air–sea exchange fluxes of DiBP, DnBP, DMP, and DEP, while strong water-to-air volatilization was estimated for bis(2-ethylhexyl) phthalate (DEHP). The estimated net atmospheric depositions were 3740 t/y for the sum of DMP, DEP, DiBP, and DnBP, but DEHP volatilized from seawater to air with an average of 900 t/y. The seasonally changing monsoon circulation, currents, and cyclones occurring in the Pacific can significantly influence the concentration of PAEs, and alter the direction and magnitude of air–sea exchange and particle deposition fluxes. Consequently, the dynamic air–sea exchange process may drive the transport of PAEs from marginal seas and estuaries toward remote marine environments, which can play an important role in the environmental transport and cycling of PAEs in the global ocean.

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Phthalate esters distribution in coastal mariculture of Hong Kong, China

Cheng

et al. 2018

Environ Sci Pollut Res

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The aim of the study is to evaluate the impact of mariculture on phthalate esters speciation and distribution in sediments and cultured fish in the Hong Kong regions and near mainland China. Concentrations of ∑phthalate esters in mariculture surface sediments (0 to 5 cm) ranged from 0.20 to 54.3 mg/kg dw (mean 10.3 mg/kg dw), with the highest recorded at M2 (20.4 mg/kg dw). Concentrations of phthalate esters were not significantly (p > 0.05) enriched in surface and sediment cores at mariculture sites relative to the reference sediments, 1 to 2 km away in areas without mariculture activities. Among different congeners, only butyl benzyl phthalate (BBP) concentrations demonstrated a significant correlation (R = 0.40, p < 0.05) with TOC values of sediments. The median concentrations of di-2-ethylhexyl phthalate (DEHP) and di-n-butyl phthalate (DBP) in the sediments were 1.57 and 6.96 times higher than the environmental risk levels (ERL), which may pose environmental risks. Results of health risk assessments revealed that the cultured fish (snubnose pompano, orange-spotted grouper, and red snapper) were safe for consumption, in terms of phthalate esters. This is the first study to assess the differences of phthalate esters contamination between mariculture and natural coastal sediments.

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Competitive adsorption of phthalate esters on marine surface sediments: kinetic, thermodynamic, and environmental considerations

Cited by 15 publications

References 43 publications

Spatial and Temporal Distribution of Di-(2-ethylhexyl) Phthalate in Urban River Sediments

Spatial and Temporal Distribution of Di-(2-ethylhexyl) Phthalate in Urban River Sediments

Air–Sea Exchange and Atmospheric Deposition of Phthalate Esters in the South China Sea

Phthalate esters distribution in coastal mariculture of Hong Kong, China

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