Research on heavy metal release with suspended sediment in Taihu Lake under hydrodynamic condition

Geng, Ningbo; Bai, Yu; Pan, Suli

doi:10.1007/s11356-021-17666-1

Cited by 15 publications

(5 citation statements)

References 46 publications

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“…The resuspension process exposes both the surface sediments and the suspended particles to oxidizing conditions, altering the physicochemical properties of the sediment environment, including changes in pH and Eh, which lead to the release of heavy metals from the surfaces of the sediments and suspended particles into the overlying water [61]. Simultaneously, hydrodynamic forces disrupt the equilibrium conditions of heavy metals at the sediment-water interface, causing changes in the water pressure and facilitating the diffusion of interstitial water within the sediment, which also results in the dispersion of heavy metals from the sediment into the overlying water [62].…”

Section: Mechanisms Of the Migration And Transformation Of Heavy Meta...mentioning

confidence: 99%

Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

Geng,

Xia,

et al. 2024

Processes

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Intertidal sediments are rich in biological resources, which are important for material circulation and energy exchange. Meanwhile, these areas can be treated as sinks as well as sources of coastal heavy metal pollutants. Due to the influence of the tide, the intertidal sediments are in a state of periodic flooding and exposure, and environmental factors such as dissolved oxygen, salinity and overlying water pressure are changeable. Heavy metals in sediments are prone to migration and transformation with the dynamic effects of tidal water and the changes in the environment factors, which increase the bioavailability of heavy metals. In this review, the characteristics of distribution and the bioavailability of heavy metals in intertidal sediments are described; the migration and transformation behavior of heavy metals and its influencing factors under tidal conditions are analyzed; and the mechanisms of heavy metal’s migration and transformation in the intertidal zone are summarized. Moreover, the bioaccumulation of heavy metal by organisms and the remediation techniques are discussed. Therefore, this review systematically summarizes the states of existence, the transport mechanisms, and the fate of heavy metals in the intertidal sediment, fills in the research gap of the cycling of heavy metal in the intertidal zone, and provides a theoretical basis for the control of heavy metal pollution.

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Section: Mechanisms Of the Migration And Transformation Of Heavy Meta...mentioning

confidence: 99%

Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

Geng,

Xia,

et al. 2024

Processes

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“…For instance, our results indicates that the reduction of Fe/Mn oxides within sediment actively promotes the liberation of adsorbed Cd, Pb, and Zn back into the overlying water. Different hydrodynamic conditions can either facilitate or impede the diffusion and transportation of heavy metals (Geng et al, 2022). Turbulent flows enhance metal dispersion and interaction with sediment particles (Hayter and Gu, 2000).…”

Section: Management Implications From Freezing Periodsmentioning

confidence: 99%

In situ, high-resolution evidence for the release of heavy metals from lake sediments during ice-covered and free periods

Zhu,

Wu,

Han

et al. 2024

Front. Ecol. Evol.

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Heavy metal dynamics at the sediment-water interface (SWI) has attracted plenty of attention due to their meticulous depiction for metal sorption-release processes. However, little is known about their concentration, migration and release characteristics underneath the ice, especially at the millimeter scale. Here we investigated dynamics of labile As, Cd, Cu, Mn, Pb and Zn by the diffusive gradients in thin-films (DGT) technique during ice-covered and ice-free periods in the Lake Xingkai basin. The concentrations of metals were relatively high at the SWI and ranged for As: 0.001~13.42 μg L−1, Cd: 0.01~0.45 μg L−1, Cu: 0.001~2.75 μg L−1, Mn: 5.31~2958.29 μg L−1, Pb: 0.06~1.43 μg L−1, and Zn: 2.92~112.96 μg L−1. Particularly, concentration of Mn was extremely higher than other studies, possibly due to diagenetic process. Labile concentrations of heavy metals in January were significantly lower than those in May, suggesting that elevated temperatures lead to the release of heavy metals from the sediment to the overlying water. Based on the Fick’s first law, the diffusive fluxes as a source of Mn (413.82-1163.25 mg·m-2·d-1) and As (3.53 -8.12 mg·m-2·d-1) indicated that heavy metals were released from sediments to the overlying water. While the diffusive fluxes as a sink of Zn (-1.80-(-2.36) mg·m-2·d-1) and Pb (-0.02-(-0.46) mg·m-2·d-1) to sediments. Redundancy Analysis (RDA) revealed that the main factors influencing the heavy metal migration were dissolved oxygen (45.6% of total explanation, P=0.01) in January, and water temperature (52.9%, P=0.006) in May. This study extends theoretical scope for understanding metal migration and release process, and provides valuable suggestions for lake management during the freezing period.

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“…Moreover, Wang et al [9] developed a coupled model based on environmental fluid dynamics code and applied it to Taihu Lake, and the results show that the transformation trend of the heavy metal pollutants is similar to that of sediment ones. Geng et al [10] also studied the release of heavy metals with suspended sediment in Taihu Lake under hydrodynamic conditions. Based on the Lattice Boltzmann method (LBM), a numerical model of heavy metals released into overlying water under hydrodynamic conditions is established.…”

Section: Introductionmentioning

confidence: 99%

Lattice-Boltzmann-Method-Based Numerical Simulation for Heavy Metal Migration Process during Deep-Sea Mining

Yin,

Chen,

Yang

et al. 2024

Symmetry

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During deep-sea mining, heavy metal pollutants can cause contamination in the marine environment. In this paper, the multiphasic coupling model is established to describe the heavy metal migration process during deep-sea mining, which takes the effects of the convection–diffusion, adsorption–desorption, and sedimentation–resuspension of heavy metals in the aquatic environment into full consideration. Due to the advantages of the Lattice Boltzmann method, it is adopted to numerically solve the multiphasic coupling model and achieve the simulation of the heavy metal migration process during deep-sea mining. In addition, taking cadmium as an example, the concentration variations are discussed and analyzed in detail. Based on the established model and Lattice Boltzmann method, the concentration distribution of heavy metals can be accurately described to provide the reasonable bases for the evaluation of marine environmental protection.

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Research on heavy metal release with suspended sediment in Taihu Lake under hydrodynamic condition

Cited by 15 publications

References 46 publications

Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

In situ, high-resolution evidence for the release of heavy metals from lake sediments during ice-covered and free periods

Lattice-Boltzmann-Method-Based Numerical Simulation for Heavy Metal Migration Process during Deep-Sea Mining

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