Heavy metals in surface sediments of the intertidal Laizhou Bay, Bohai Sea, China: Distributions, sources and contamination assessment

Zhang, Jinfeng; Gao, Xuelu

doi:10.1016/j.marpolbul.2015.06.035

Cited by 114 publications

(16 citation statements)

References 45 publications

(41 reference statements)

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“…The Monte Carlo simulation demonstrated that only Hg in September 2016 showed a probability (0.03%) of moderate risk (Table 6). The sources of Hg in this area were mainly land-based human activities, including factory discharge and combustion of fossil fuels, and river transportation is possibly the main means by which Hg enters Laizhou Bay [12, 14].…”

Section: Resultsmentioning

confidence: 99%

Probabilistic ecological risk assessment of heavy metals in western Laizhou Bay, Shandong Province, China

Chi

Tian

et al. 2019

PLoS ONE

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Considering the serious land-based pollution and the weak water exchange ability of western Laizhou Bay, it is essential to conduct an ecological risk assessment of the pollutants in this area. In this study, the ecological risk caused by heavy metals deposited in the surface sediments and those resuspended in the seawater of western Laizhou Bay was evaluated using probabilistic approaches. First, the concentrations of seven heavy metals, namely As, Cd, Cr, Cu, Hg, Pb, and Zn, in the surface sediments and seawater of western Laizhou Bay were detected during the spring and autumn of 2016. The concentrations of As, Cd, Cr, Cu, and Pb were found to be at levels comparable to those in the other global coastal systems, while those of Hg and Zn were lower than those in other coastal areas. Next, an ecological risk assessment of heavy metals in the surface sediments was performed using a typical potential ecological risk index and refined by using a Monte Carlo simulation. The results suggested low risk for the heavy metals detected in the sediments of western Laizhou Bay, with the exception of Hg in September 2016, which showed a probability (0.03%) of moderate risk. Meanwhile, the aquatic ecological risk assessment of the heavy metals was performed by applying a combination of hazard quotient (HQ) and joint probability curve. While the ecological risk of Cd, Hg, and Pb was found to be acceptable, the HQs for Cr, Cu, and Zn were greater than 1, and the overall risk probability of their adverse effects was higher than 0.05, suggesting certain ecological risk. Specifically, in the case of As, the overall risk probability was lower than 0.05, suggesting that its ecological risk was acceptable, although its HQ was greater than 1. Thus, by applying the probabilistic approaches, the ecological risk of the heavy metals in western Laizhou Bay was better characterized in this study, avoiding both overestimation and underestimation of ecological risk.

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Section: Resultsmentioning

confidence: 99%

Probabilistic ecological risk assessment of heavy metals in western Laizhou Bay, Shandong Province, China

Chi

Tian

et al. 2019

PLoS ONE

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“…In addition to hydrological factors, the particle size and components of sediments affect metal concentrations. In particular, finer particles tend to be metal adsorbent, and this tends to affect the physical transportation of metals [ 22 ]. Fine particles are also always associated with organic matter, as observed in the current study, and this resulted in metal deposition, especially within the wetland sites from which metals were slowly being released downstream [ 40 , 41 , 42 , 43 ].…”

Section: Discussionmentioning

confidence: 99%

“…Hence, improved insights into mechanisms of accumulation and geochemical distributions of metals are extremely important to gauge the extent of metal pollution in aquatic systems [ 3 , 12 , 21 ]. In turn, this monitoring is crucial when assessing ecological risks and developing pollution control strategies [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Quantifying Metal Contamination and Potential Uptake by Phragmites australis Adans. (Poaceae) Along a Subtropical River System

Netshiongolwe

Cuthbert

Maenetje

et al. 2020

Plants

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: Metal pollution is pervasive across terrestrial and aquatic ecosystems owing to anthropogenic activities. Sediments can accrue high concentrations of metals and act as secondary sources, and thus may be valuable indicators of metal contamination across spatiotemporal scales. In aquatic systems, the extent of metal pollution may be further mediated by transference among sediments and living organisms, with plant metal contaminants potentially predictive of underlying sediment concentrations. The present study thus quantifies the extent of metal pollutants (Na, K, Ca, Mg, Cu, Zn, Mn, B, Fe) across multiple study sites and seasons (cool-dry, hot-wet, hot-dry) in a subtropical river system. Furthermore, uptake by a key macrophyte species, Phragmites australis, was examined and correlated with sediment pollution levels among different plant parts. Overall, sediment pollution load indices differed seasonally, being significantly highest during the cool-dry season irrespective of sampling location, suggesting that periods with reduced water flows can exacerbate metal pollution levels in riverine sediments. Also, metal concentrations were highest in upstream wetland sites, indicating a capacity for metal sink effects in these areas. Overall, macrophytes contained high concentrations of select metals, however composition and concentrations differed across plant parts, with roots containing particularly high concentrations of Fe and B. Correlations between sediment and macrophyte concentrations were mostly non-significant, whilst stem Mn and Fe concentrations correlated significantly negatively and positively to sediment concentrations, respectively. The present study identifies key spatiotemporal differences in multiple metal contaminants in an understudied subtropical aquatic system that align with hydrological regime differences. Whilst macrophytes were not found to be major accumulators, or predictors, of metal contaminants in this study, they may collectively play a central role in concentration regulation in aquatic systems.

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“…Heavy metals (HMs) are extremely poisonous, non-biodegradable, and readily accumulated in the aquatic life. Surface runoff, especially with the development of industry, agriculture, and urbanization, discharged them into the marine environment (Diagomanolin et al, 2004;Zhang & Gao, 2015;Ranjbar Jafarabadi et al, 2017;Liu et al, 2018;Younis et al, 2019;Soliman et al, 2020). Metals are scavenged by particulate matter and deposited to coastal sediments after entering coastal waters, and hence, sediments are considered a major component of metal storage in marine ecosystems (Pan & Wang, 2012).…”

Section: Introductionmentioning

confidence: 99%

Spatial, seasonal distribution and ecological risk assessment of Zn, Cr, and Ni in Red Sea surface sediments, Egypt

Hanafy¹

2021

Egypt. J. of Aquatic Biolo. and Fish.

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Recently, the marine ecology in the Red Sea coast has been altered due to various anthropogenic activities that led to an accumulation of heavy metals (HMs) in its sediments. To evaluate the spatial and temporal distribution and the ecological risk assessment along the study area of the Egyptian Red Sea coast, fourteen samples of sediments were collected during spring and autumn in 2015. The present study aimed to address chromium, zinc, nickel, total carbonate and organic matter in the sampled sediments to assess the risk. In both seasons, the descending order of metal concentrations was Zn > Cr > Ni. The level of studied metals was compared to the background and sediment quality guideline (SQG) values. Results revealed that an adverse biological effect in some sites was possible. Zinc, for instance, recorded higher averages than those of the background and those detected along worldwide coasts. Additionally, to evaluate pollution, methodologies such as the enrichment factor (EF), contamination factor (CF), pollution index (PI) and modified pollution index (MPI) were calculated and interpreted.

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Heavy metals in surface sediments of the intertidal Laizhou Bay, Bohai Sea, China: Distributions, sources and contamination assessment

Cited by 114 publications

References 45 publications

Probabilistic ecological risk assessment of heavy metals in western Laizhou Bay, Shandong Province, China

Probabilistic ecological risk assessment of heavy metals in western Laizhou Bay, Shandong Province, China

Quantifying Metal Contamination and Potential Uptake by Phragmites australis Adans. (Poaceae) Along a Subtropical River System

Spatial, seasonal distribution and ecological risk assessment of Zn, Cr, and Ni in Red Sea surface sediments, Egypt

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