Heavy metal pollution assessment in relation to sediment properties in the coastal sediments of the southern Caspian Sea

Bastami, Kazem Darvish; Neyestani, Mahmoud Reza; Shemirani, Farzaneh; Soltani, Farzaneh; Haghparast, Sarah; Akbari, A. Hossein Nezhad G.

doi:10.1016/j.marpolbul.2014.12.035

Cited by 180 publications

(42 citation statements)

References 28 publications

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“…Pollution with trace elements is regarded as a serious threat to the environment and wildlife habitats due to their toxicity, persistence, and ability to be incorporated into food chains (Ayas et al 2007; Gao et al 2013; Urbaniak et al 2008). Nowadays, key studies on trace elements in bottom sediments cover potential ecological risk, geochemical cycling, assessment of health risk caused by trace elements, and toxicity assessment (Fang et al 2012; Bastami et al 2015; Sayed et al 2015; Li 2014, Baran and Tarnawski 2015). Different environmental factors such as chemical, physicochemical, biological, and ecotoxicological must be taken into account for the assessment of ecological risk caused by trace element exposure in the aquatic ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of trace elements and ecotoxicity of bottom sediments in Rybnik reservoir, Silesian-Poland

Baran

Tarnawski

Koniarz

2016

Environ Sci Pollut Res

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The aim of study was to integrate chemical analyses and toxicity bioassays in order to assess the environmental risk connected with the presence of trace elements in the sediments. This study examined the ecological significance of trace elements in bottom sediments by applying a set of complementary sediment quality assessment methods sediment quality guidelines (SQGs) (mean probable effect concentration quotient (PECQ)), potential ecological risk index (PERI), contamination degree (C d ) and two bioassays: the bacterial luminescence inhibition test with Vibrio fischeri on sediment elutriates and the direct contact test with the ostracod crustacean Heterocypris incongruens. The samples were collected from 50 stations of Rybnik reservoir. The reservoir is a region with enormous concentration of industry, mainly hard coal mining, electric power industry, and transportation. Despite the high diversity in metal concentration in the sediments, the spatial distribution of trace elements in the sediments was very similar. Moreover, the strong positive correlations between individual pairs of trace elements indicate that they may derive from a similar source and move together. According to mean PECQs, 68 % of the samples were potentially non-toxic and 32 % of the samples were potentially toxic. PERI values suggested that 70 % of the sediment sampling sites exhibited low ecological risk from metal pollution while 24 % of the samples had severe and serious risk. Based on our combined evaluation, we believe that Cd and Cu in the sediment samples frequently caused adverse biological effects. Higher toxic responses were observed in the Microtox test than in the Ostracodtoxkit test. All the sediment samples were found toxic to V. fischeri, and 96 % of the samples had effect percentages >50 %. For H. incongruens, 12 % of the sediments were not toxic and 44 % had effect percentages >50 %. In order to perform a complex assessment of the environmental impact of metal pollution, both chemical and ecotoxicological analysis should be carried out.

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Section: Introductionmentioning

confidence: 99%

Spatial distribution of trace elements and ecotoxicity of bottom sediments in Rybnik reservoir, Silesian-Poland

Baran

Tarnawski

Koniarz

2016

Environ Sci Pollut Res

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“…Untreated or not fully treated waste waters containing As and Hg from urban areas, industrial sites and agricultural areas are discharged into aquatic environments Bastami et al, 2015;Zalewska et al, 2015). As and Hg are highly toxic heavy metals, which are transported in the water column, accumulated in sediments, and biomagnified through the food chain, resulting in remarkable ecological risks to benthic organisms, fish and humans (Neff, 1997;Mason et al, 2000;Cotin et al, 2011;Nance et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Distributions, sources and ecological risk assessment of arsenic and mercury in the surface sediments of the southwestern coastal Laizhou Bay, Bohai Sea

Zhuang

Gao

2015

Marine Pollution Bulletin

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a b s t r a c tThe spatial distributions of As and Hg in riverine and marine surface sediments of the coastal southwestern Laizhou Bay were obtained, and multiple indices and guidelines were applied to assess their contamination and ecological risks. The As concentrations in riverine sediments were close to those in marine sediments, and on the whole the dominant proportion of As was identified to be from natural sources. The Hg concentrations in riverine sediments were much higher than those in marine sediments, so river transportation was likely the main way of Hg into the southwestern Laizhou Bay. In respect of As, the sediment quality was fine according to the risk assessment methods used; in contrast, Hg presented an extremely contaminated status with a very high ecological risk in some riverine sediments, while most of the marine sediments were relatively much less polluted by Hg and under a lower ecological risk from it.Ó 2015 Elsevier Ltd. All rights reserved.There is worldwide concern about contamination caused by heavy metals such as arsenic (As) and mercury (Hg), because of the environmental persistence, the biogeochemical recycling and the ecological risks of these elements. Untreated or not fully treated waste waters containing As and Hg from urban areas, industrial sites and agricultural areas are discharged into aquatic environments Bastami et al., 2015;Zalewska et al., 2015). As and Hg are highly toxic heavy metals, which are transported in the water column, accumulated in sediments, and biomagnified through the food chain, resulting in remarkable ecological risks to benthic organisms, fish and humans (Neff, 1997;Mason et al., 2000;Cotin et al., 2011;Nance et al., 2012). When entering the aquatic environment, only a small part of free metal ions stay dissolved in water because of the combined action of adsorption, hydrolysis and co-precipitation, and the rest of them get deposited in sediments (Gaur et al., 2005). However, when environmental conditions change, sediments may transform from the main sink of heavy metals to the sources of them for the overlying waters (Gaur et al., 2005;Prica et al., 2008). So the measurements of heavy metals only in the water and in the suspended materials are far from enough due to water discharge fluctuations and low resident time (Varol, 2011). Therefore the concentrations of heavy metals in sediments are often monitored to provide basic information for the environmental risk assessment (Long et al., 1995; SEPA, 2002).The Laizhou Bay is a semi-enclosed shallow coastal water region located in the northwest of Shandong Peninsula with $7000 km 2 in area and a $320 km long coastline, accounting for about 10% of the total area of the Bohai Sea, China. The Bohai Sea is recognized as one of the marine ecosystems in China that face with serious eco-environmental problems, and the Laizhou Bay is one of its three major bays . The topography of the Bay tilts from the southeast to the northwest, with a gradually down trend. Affected by the Yellow River, the Yellow River del...

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“…Moreover, it is equally important to evaluate the biological adverse risks. Hence, comparisons with sediment quality guidelines (SQGs) are usually done (Bastami et al, 2015;Merhaby et al, 2015;Wang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Distribution and ecotoxicology of bioavailable metals and As in surface sediments of Paraguaçu estuary, Todos os Santos Bay, Brazil

Pereira

Moreira

Oliveira

et al. 2015

Marine Pollution Bulletin

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Surface sediments collected in the intertidal zone of Paraguaçu estuary in July, 2013, were analyzed for organic matter, nitrogen, phosphorus, grain size fractions and partial concentrations of 16 metals. The USEPA 3051A method and ICP-OES and CV-AAS techniques were chosen to metal analysis. Pollution indices (EF, Igeo and PIN) and a comparison with sediment quality guidelines (UET, ERL, ERM, TEL and PEL of NOAA) were conducted in order to evaluate the potential metal impacts over the area. Principal Component Analysis (PCA) and Pearson correlation results showed the importance of organic matter content and the fine-grained fraction of sediments on the control of the bioavailable metals distribution. The Paraguaçu estuary already has anthropogenic enrichment relative to the background level, especially for Mn, whose values exceeded almost 30 times the background at one site (Mn: 1197.30 mg kg(-1)). However, metal levels are still below the reference values with the exception of Hg at one site (Hg: 0.25 mg kg(-1), exceeded TEL and ERL).

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Heavy metal pollution assessment in relation to sediment properties in the coastal sediments of the southern Caspian Sea

Cited by 180 publications

References 28 publications

Spatial distribution of trace elements and ecotoxicity of bottom sediments in Rybnik reservoir, Silesian-Poland

Spatial distribution of trace elements and ecotoxicity of bottom sediments in Rybnik reservoir, Silesian-Poland

Distributions, sources and ecological risk assessment of arsenic and mercury in the surface sediments of the southwestern coastal Laizhou Bay, Bohai Sea

Distribution and ecotoxicology of bioavailable metals and As in surface sediments of Paraguaçu estuary, Todos os Santos Bay, Brazil

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