Contamination of Nearshore Surficial Sediments from the Iranian Coast of the Caspian Sea

Parizanganeh, Abdolhossein; Lakhan, V. Chris; Jalalian, Hamid; Ahmad, Sajid Rashid

doi:10.1080/15320380701741305

Cited by 9 publications

(4 citation statements)

References 40 publications

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“…Many researchers suggested the direct relationship between levels of pollutants and the availability of fine sediments [54][55][56]. This process is explained adsorption, co-precipitation, and complexing reactions of metals on particle surfaces [57]. In the present study, results exposed the dominance of fine sand (Figure 6), suggesting the influence of macrotidal currents typical in São Marco Bay [42] on preventing mud accumulation.…”

supporting

confidence: 59%

Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil)

Fonseca¹,

F²,

S³

et al. 2020

OFOAJ

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The assessment of pollution in poor regions remains a challenge for developing countries. Difficult access to and low availability of logistical conditions result in a lack of information on environmental quality in these regions. To provide information on heavy metals concentrations in water and sediments, samples were collected in seven sampling stations in São Marco Bay's harbor area, seasonally, from August 2017 to September 2018. Water samples were evaluated for temperature, turbidity, salinity, Eh, oxygen content, pH, phosphorus, total organic carbons, and heavy metals. In sediment samples, heavy metals' potentially mobilizable fractions were evaluated. In parallel, grain size, organic matter and redox potential were also analyzed. The average values of water and its physicochemical parameters revealed an unstratified environment with a great influence of ocean waters. High concentrations of metals were recorded in the water of sediment contamination. The present study suggested the high hydrodynamics and resulting coarser grain size accumulation as the cause for the relatively balanced environment conditions.

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supporting

confidence: 59%

Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil)

Fonseca¹,

F²,

S³

et al. 2020

OFOAJ

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“…The quality and quantity of trace element accumulations in sediments depend on the sediment mineralogy, sediment texture and physical makeovers [17][18][19]. In addition, the depositional condition of sediments varies when subjected to the physical landforms on coastal environments [17,18].…”

Section: Introductionmentioning

confidence: 99%

An Ecological Risk Assessment of Sediments in a Developing Environment—Batticaloa Lagoon, Sri Lanka

Adikaram

Pitawala

Ishiga

et al. 2021

JMSE

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The land-sea interface is considered as a threatening environment due to anthropogenic development activities. Unplanned developments can cause effects on important ecosystems, water and human health as well. In this study, the influence of rapid regional development on the accumulation of trace elements to the sediments of an important ecosystem, Batticaloa lagoon, Sri Lanka was examined. Surface sediment pollution status and ecological risk was compared with that of the recent sedimentary history of about 1 m depth. Sediment core samples were collected and analyzed for grain size, organic matter and carbonate contents and trace elements (As, Pb, Zn, Cu, Ni and Cr) by the X-Ray Fluorescence (XRF) technique. The chemical results of core samples and recently published data of surface sediments of the same project were evaluated by pollution load index (PLI), potential ecological risk index (PERI) and sediment quality guidelines (SQG). Except for Cr, all other elements in cores show lower concentrations than the SQGs confirming the high Cr contents as recorded in the most of other Sri Lankan sediments. The sediment cores indicate an unpolluted, low ecological risk sedimentary history for all core sampling locations, whereas most of the surface sediments of the lagoon are less polluted with low potential ecological risk. Present anthropogenic practices and illiteracy of this rapid developing region can damage the green environment and hence environmental management planning is suggested for a sustainable future.

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“…Thus, the pH of the sediments had little effect on the fractions of heavy metal(loid)s, and there was a weak correlation between the pH and the fraction of heavy metal(loid)s [ 38 ]. The particle size of the sediment could affect the distribution and fractions of heavy metal(loid)s in the sediments [ 51 ]. As shown in Table 3 , silt and clay showed a significant positive correlation with the F1 and F2 fractions of Cu, while sand showed a negative correlation with the F1 and F2 fractions of Cu, suggesting that small sediment particles could increase copper mobility and bioavailability [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

Distribution, Ecological Risk, and Source Identification of Heavy Metal(loid)s in Sediments of a Headwater of Beijiang River Affected by Mining in Southern China

Luo,

Zhang,

Zhang

et al. 2024

Toxics

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In this study, the contents of eight heavy metal(loid)s (As, Pb, Zn, Cd, Cr, Cu, Sb and Tl) in 50 sediment samples from a headwater of Beijiang River were studied to understand their pollution, ecological risk and potential sources. Evaluation indexes including sediment quality guidelines (SDGs), enrichment factor (EF), geo-accumulation index (Igeo), risk assessment code (RAC) and bioavailable metal index (BMI) were used to evaluate the heavy metal(loid)s pollution and ecological risk in the sediments. Pearson’s correlation analysis and principal component analysis were used to identify the sources of heavy metal(loid)s. The results showed that the average concentration of heavy metal(loid)s obviously exceeded the background values, except Cr. Metal(loid)s speciation analysis indicated that Cd, Pb, Cu and Zn were dominated by non-residual fractions, which presented higher bioavailability. The S content in sediments could significantly influence the geochemical fractions of heavy metal(loid)s. As was expected, it had the most adverse biological effect to local aquatic organism, followed by Pb. The EF results demonstrated that As was the most enriched, while Cr showed no enrichment in the sediments. The assessment of Igeo suggested that Cd and As were the most serious threats to the river system, while Cr showed almost no contamination in the sediments. Heavy metal(loid)s in sediments in the mining- and smelting-affected area showed higher bioavailability. According to the results of the above research, the mining activities caused heavier heavy metal(loid)s pollution in the river sediment. Three potential sources of heavy metal(loid)s in sediment were distinguished based on the Pearson’s correlation analysis and PCA, of which Cd, Pb, As, Zn, Sb and Cu were mainly derived from mining activities, Cr was mainly derived from natural sources, Tl was mainly derived from smelting activities.

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Contamination of Nearshore Surficial Sediments from the Iranian Coast of the Caspian Sea

Cited by 9 publications

References 40 publications

Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil)

Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil)

An Ecological Risk Assessment of Sediments in a Developing Environment—Batticaloa Lagoon, Sri Lanka

Distribution, Ecological Risk, and Source Identification of Heavy Metal(loid)s in Sediments of a Headwater of Beijiang River Affected by Mining in Southern China

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