Heavy metal distribution and contamination status in the sedimentary environment of Cochin estuary

Salas, P. M.; Sujatha, C. H.; Kumar, C. S. Ratheesh; Cheriyan, Eldhose

doi:10.1016/j.marpolbul.2017.04.018

Cited by 67 publications

(11 citation statements)

References 76 publications

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“…Industrialization and urbanization have resulted in a strong risk of TEs contamination in ecosystems. Therefore, assessment of TEs accumulation that has resulted from anthropogenic activities is of special concern because of their bioaccumulation effects [4].…”

Section: Introductionmentioning

confidence: 99%

“…Once discharged into aquatic systems, TEs undergo numerous processes such as dissolution, sorption, precipitation and complexation with inorganic or organic ligands and particulate matter. Once they reach bottom sediments, TEs create a potential supply of pollution elements that can alter environmental quality [4]. The flow of contamination to some drains from several tributaries, urban drainages and industrial effluents are delivered in some cases to the estuarine regions and move to the adjoining agricultural soils through processes such as irrigation, flood deposition, and dredging.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal and Spatial Distribution of Soil Trace Elements around Kitchener Drain in the Northern Nile Delta, Egypt

et al. 2019

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The pollution of agricultural soils, water and plants by trace elements (TEs) in the Nile Delta Region, Egypt, is of great importance. This study aimed to investigate the spatial and seasonal variation of some TEs in the agricultural area adjacent to Kitchener Drain and to evaluate the ecological risk posed by these elements using six indices. Soil and plant samples were collected from seven sites close to the drain, while water samples were collected from the corresponding sites inside the drain during three seasons (winter, spring and fall). The results showed that all studied TEs in the soil varied seasonally and spatially among the locations around the drain. Most of the studied elements in the soil were higher in the southern and middle area around the drain. All studied elements in the soil were also higher in the winter than other seasons. Nickel and lead were almost non-detected during all seasons in plant tissues, while other elements were higher in the winter than other seasons. In contrast to the soil and plant tissues, water samples demonstrated lower or non-detected levels of TEs. The results also indicated that the values for the risk assessment indices differed among the studied TEs. Therefore, there is a risk of increasing the concentration of some metals in the study area due to anthropogenic pollution from the adjacent polluted drain through irrigation with contaminated water and spreading of contaminated dredged materials on agricultural fields.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seasonal and Spatial Distribution of Soil Trace Elements around Kitchener Drain in the Northern Nile Delta, Egypt

et al. 2019

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“…Industrial or municipal wastewater treated by effluent treatment plants (ETPs) contains more organic pollutants and matter, including heavy metals such as chromium, zinc, copper and lead. The metals uptake by floc of sludge is of great importance in pollution abatement (Świerczek et al 2018), (Salas et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Back-propagation neural network: Box–Behnken design modelling for optimization of copper adsorption on orange zest biochar

Sivamani¹,

Prasad²,

Nithya

et al. 2021

Int. J. Environ. Sci. Technol.

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Heavy metals adsorption by adsorbents prepared from natural materials is a low-cost effective method for their removal from aqueous environments. This study aims to assess the applicability of orange zest biochar to adsorb divalent copper (cupric chloride) from its aqueous solution by maximizing the adsorption capacity using feed-forward back-propagation neural network (FFBPNN)-Box-Behnken design (BBD) modelling. BBD modelling predicted the maximum of 99.61% copper removal at an initial concentration of copper, adsorbent dosage and temperature of 100 ppm, 192.5 mg per 100 mL of feed solution and 38 °C. The results showed the best fit between experimental, BBD and FFBPNN predicted values. Langmuir isotherm fitted well with the experimental data than Freundlich model, and the maximum adsorption capacity was found to be 116.28 mg/g. Also, adsorption kinetic data followed the Lagergren's pseudo-first-order kinetic model. Thus, the obtained results conclude that the orange zest biochar was found to be one of the potential adsorbents for the removal of divalent copper from its aqueous solution.

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“…Sediments are important sinks for various pollutants and play a useful role in the assessment of heavy metal contamination (Delshab et al 2017). According to Salas et al (2017), bottom sediments may serve as a metal pool that can release metals to the overlaying water via natural anthropogenic processes, causing  Author for correspondence: tunjimoruf@gmail.com potential adverse health effects to the ecosystems because of their serious toxicity and persistence. The deposition of mercury in sediments occurs through an interaction between sediment and water, whereby variations of metal contents of sediment and water depend on variation of water chemistry, for example temperature, pH and solute concentration (Hosseini et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Relationship Between Mercury Concentration in Water, Bottom Sediment And Two Mollusc Species (Crassostrea Gasar and Tympanotonus Fuscatus) From a Lagos Creek in Nigeria

et al. 2021

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Concentration of mercury was investigated in the flesh and shell of two species of benthic mollusc, Crassostrea gasar and Tympanotonus fuscatus and in water and sediment from Makoko Creek, adjacent to the Lagos Lagoon between January to September 2019. Values obtained for physicochemical parameters in Makoko Creek (water temperature- 28.92±0.1°C; pH- 7.73±0.02; salinity- 14.23±0.05 ppt; dissolved oxygen- 5.34±0.02 mg/l; biological oxygen demand- 7.780±0.1 mg/l and chemical oxygen demand- 12.34±0.02 mg/l) were within the acceptable levels for survival, metabolism and physiology of aquatic organism. The concentration of mercury followed decreasing order as sediment >water >flesh >shell across locations for both species. For all the tested samples of C. gasar and T. fuscatus, biowater accumulation factor in flesh and shell were higher than those of bio-sediment accumulation factor. The coefficients of variance (CV %) in shells were lower than those of the flesh for both investigated mollusc species. It was shown that mercury contents of flesh or shells of C. gasar and T. fuscatu are directly affected by those of water and bottom sediment. J. Bio-Sci. 29(1): 143-151, 2021 (June)

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Heavy metal distribution and contamination status in the sedimentary environment of Cochin estuary

Cited by 67 publications

References 76 publications

Seasonal and Spatial Distribution of Soil Trace Elements around Kitchener Drain in the Northern Nile Delta, Egypt

Seasonal and Spatial Distribution of Soil Trace Elements around Kitchener Drain in the Northern Nile Delta, Egypt

Back-propagation neural network: Box–Behnken design modelling for optimization of copper adsorption on orange zest biochar

Relationship Between Mercury Concentration in Water, Bottom Sediment And Two Mollusc Species (Crassostrea Gasar and Tympanotonus Fuscatus) From a Lagos Creek in Nigeria

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