Assessment of heavy metal pollution, distribution and quantitative source apportionment in surface sediments along a partially mixed estuary (Modaomen, China)

Liu, Qiuxin; Jia, Zhiqian; Li, Shiyu; Hu, Jiatang

doi:10.1016/j.chemosphere.2019.03.063

Cited by 84 publications

(28 citation statements)

References 58 publications

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“…However, it should be noted that there are potential pitfalls of the conservative mixing line approach because it assumes it is possible to identify a unique freshwater end-member composition when the river water may come from several sources, which themselves are time variant or may enter within the estuarine mixing zone. External sources of metals can be significant in contaminated estuaries (Liu et al 2019). Fixing the seawater end-member composition is often more straightforward due to its relative homogeneity.…”

Section: Metal Behaviour During Estuarine Mixingmentioning

confidence: 99%

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Particle aggregation, pH changes and metal behaviour during estuarine mixing: review and integration

Mosley

Liss

2020

Mar. Freshwater Res.

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Estuaries are dynamic mixing zones where river water interacts with seawater, resulting in large and complex geochemical changes. How two key factors, particle aggregation and pH, affect metal behaviour in estuaries is reviewed and integrated in this paper. Riverine particles are coated with organic matter and electrostatic repulsive forces restrict aggregation. In estuaries, increased concentrations of divalent cations reduce the repulsive forces between particles at low salinities, resulting in their rapid coagulation and removal of particulate-associated metals (e.g. Fe and Pb). However, truly dissolved metals may mix conservatively, and metals associated more with colloidal and dissolved organic material (e.g. Cu and Zn) can show variable behaviour. In many field studies and modelling of river inputs with different compositions, pH decreases slightly at low salinity. Geochemical model simulations of dissolved metal speciation indicated that Zn would be desorbed from iron oxide binding surfaces due to these pH and cation concentration changes, with Cu also showing less binding to dissolved organic matter (DOM). DOM, pH and particle surfaces can influence individual metal behaviour at various spatial and temporal scales. Further integrated field and laboratory research in estuaries where key geochemical processes affecting metal concentrations are measured and modelled is needed.

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Section: Metal Behaviour During Estuarine Mixingmentioning

confidence: 99%

“…Pb, Zn). In estuaries affected by pollution, significant amounts of anthropogenic metal inputs may end up in the sediment (Liu et al 2019). Following deposition, mixing and redistribution of sediment phases and associated metals can occur (Reese et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Particle aggregation, pH changes and metal behaviour during estuarine mixing: review and integration

Mosley

Liss

2020

Mar. Freshwater Res.

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“…Although low to moderate ecological risk in the upstream and high ecological risk in the downstream was predicted, mobility and bioavailability of metals were considered as an important factor of risk analysis. Liu, Jia, Li, and Hu (2019) tried to comprehend the heavy metals, for example, Cu, Zn, Pb, Cr, Ni, Co, and Cd pollution, distribution and quantitative source monitoring in contaminated sediment near three locations, that is, tidal river channel (TRC), weakly mixed zone (WMZ) and strongly mixed zone (SMZ) of partially mixed estuary by positive matrix factorization (PMF) equipped with GIS. Cu, Zn, Pb, Cr, Ni, Co, and Cd concentrations in the sediment were 16.…”

Section: Annual Literature Reviewmentioning

confidence: 99%

“…Liu, Jia, Li, and Hu (2019) tried to comprehend the heavy metals, for example, Cu, Zn, Pb, Cr, Ni, Co, and Cd pollution, distribution and quantitative source monitoring in contaminated sediment near three locations, that is, tidal river channel (TRC), weakly mixed zone (WMZ) and strongly mixed zone (SMZ) of partially mixed estuary by positive matrix factorization (PMF) equipped with GIS. Cu, Zn, Pb, Cr, Ni, Co, and Cd concentrations in the sediment were 16.86–47.93, 111.56–235.78, 33.60–72.85, 0.40–3.90, 71.19–177.54, 21.41–47.97, and 14.64–29.37 mg/kg, respectively, when WMZ had high metal concentration than that of TRC and SMZ except for Cu because WMZ could settle the sediment especially fine particles that could support strong metal sorption process at low water velocity zone while low metal concentrations were basically influenced by sand mining or sediment dredging; and, moreover, fine particles were rich in high mineral content with organic matter and huge surface area per unit mass.…”

Section: Geographic Information System (Gis) For Monitoringmentioning

confidence: 99%

Contaminated aquatic sediments

Hossain

2020

Water Environment Research

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Aquatic sediments are contaminated by different anthropogenic activities and natural deposition. This review manuscript has discussed on published manuscript in 2019 based on monitoring and identification of contaminants, GIS application and isotopic evaluation for monitoring of pollutants, physicochemical and biochemical fate and transport of the pollutants as well as remediation and toxicity analysis so that environmental and ecological impacts due to pollution can be minimized.

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“…Kang et al [5] studied the effect of dissolved oxygen and nutrient level (NH 4 + , NO 3 − and PO 4 3− ) of the overlying water on the metal speciation and metal contents in river surface sediment. Fractionation of metal in the sediment may be affected by bioturbation, organic decay and change in pH and oxidation reduction potential (ORP) of the overlying water [5,7,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Metal Fractionation in Surface Sediments of the Brahmaputra River and Implications for Their Mobilization

Tsering

Sillanpää

Рейникайнен

et al. 2020

IJERPH

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The Brahmaputra River is the largest tropical river in India that flows along the Himalayan regions and it is the lifeline of millions of people. Metal fractionation in the Brahmaputra River’s surface sediments and its correlation with turbidity are assessed in this study. The interaction between metal fractions and the overlying water is studied using multivariate statistical analyses. The strong positive correlation between NH4 of the overlying water and the exchangeable fractions in sediments signifies that the metals in the exchangeable fractions can be substituted by NH4. Subsequently, these metals can be released into the overlying water. The fluctuation in turbidity from 73 to 875 NTU indicates a large variation in the suspended matter concentration, and a higher concentration of suspended matter could provide attachment sites for pollutants such as metals. Significant variation in turbidity manifests a potentially high risk of pollution. In addition, the observation of local people along the Brahmaputra River turning its color to muddy indicates the need for continuous monitoring of water quality and an assessment of pollution is crucial. Although the Brahmaputra River’s risk assessment code is at low risk, the exchangeable fractions of Ni and Zn are present at all sites. Thus, the Brahmaputra River requires early preventive measures and management strategies to control metal pollution. This study contributes to an understanding of the fluctuation of turbidity of a tropical river. We provide baseline data for policymakers, and the importance of further intensive studies on metal pollution in the Himalayan Rivers is highlighted.

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Assessment of heavy metal pollution, distribution and quantitative source apportionment in surface sediments along a partially mixed estuary (Modaomen, China)

Cited by 84 publications

References 58 publications

Particle aggregation, pH changes and metal behaviour during estuarine mixing: review and integration

Particle aggregation, pH changes and metal behaviour during estuarine mixing: review and integration

Contaminated aquatic sediments

Metal Fractionation in Surface Sediments of the Brahmaputra River and Implications for Their Mobilization

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