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Environmental Earth Sciences

Erschienen in:

01.01.2016 | Original Article

Role of salinity in the multiphase redistribution of polycyclic aromatic hydrocarbons (PAHs) in sediment suspension

verfasst von: Rufeng Li, Chenghong Feng, Dongxin Wang, Baohua Li, Lijuan Hu, Zhenyao Shen

Erschienen in: Environmental Earth Sciences | Ausgabe 2/2016

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Abstract

Sediment suspension in estuarine environment was simulated with particle entrainment simulator device to investigate the phase redistribution characteristics of polycyclic aromatic hydrocarbons (PAHs). The main focus was laid especially on the role of salinity gradient in the static and dynamic release behavior of PAHs via keeping the consistent of other factors (i.e., hydrodynamic condition and sediment component) in the whole experiment. Results showed that salinity facilitated the accumulation of dissolved and particle-bound PAHs in overlying water in sediment pre-standing and suspending period, which certainly increased the adverse ecological effect of PAHs in sediments. The most beneficial value of salinity for PAHs release from sediments was about 20 ‰. Salinity had more significant impact on the release behaviors of 2+3 ring PAHs than other individual PAHs species. Salinity significantly changed the diameter and suspending status of flocs via adsorption and charge neutralization, and thus affected the existing status of PAHs in the overlying water. Based on quantitative calculation, salinity was found to have more significant influence on the release of PAHs than the pre-fixed hydrodynamic force.

Vorheriger Artikel Estimation of the maximum velocity using the entropy concept in an open channel

Nächster Artikel Numerical modeling of tidal effects on groundwater dynamics in a multi-layered estuary aquifer system using equivalent tidal loading boundary condition: case study in Zhanjiang, China

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Titel: Role of salinity in the multiphase redistribution of polycyclic aromatic hydrocarbons (PAHs) in sediment suspension
verfasst von: Rufeng Li
Chenghong Feng
Dongxin Wang
Baohua Li
Lijuan Hu
Zhenyao Shen
Publikationsdatum: 01.01.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Environmental Earth Sciences / Ausgabe 2/2016
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-015-5014-2

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