Nickel sorption and speciation in a marine environment

Sadiq, Muhammad

doi:10.1007/bf00026557

Cited by 12 publications

(2 citation statements)

References 23 publications

(30 reference statements)

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“…Generally, free ionic metal concentrations are reduced in high-salinity environments in comparison with low salinity because of the increased presence of complexing anions. For instance, the two anions (SO 4 2− and Cl − ) are noteworthy in seawater for nickel [34,58]. Besides, at higher salinities, there should be increased competition with metal ions by protective cations such as Na + , Mg 2+ , and Ca 2+ for binding to sites at the biotic ligand (Leonard et al [34] and reference therein).…”

Section: Influence Of Environmental Heterogeneities (Hydrographical Amentioning

confidence: 99%

Interferences of trace metals between sediment and Dotillid crab (Ilyoplax frater) from three tidal creeks, Karachi, Pakistan

Siddiqui

Saher

2021

SN Appl. Sci.

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In the Anthropocene era, an immersion of toxic substances, i.e., trace metals, has been enhanced in the marine environment not only due to urban sprawl and industrial development but predominantly owing to incongruous management and lack of sustainable approaches. The coastal region of Pakistan shares a similar obstacle as most of the developing countries confronted. Therefore, this study was designed to investigate concentrations of eight metals (Cu, Fe, Zn, Ni, Co, Pb, Cr, and Cd) in sediment and Dotillid crab, Ilyoplax frater, at three tidal creeks in Karachi, Pakistan. All metals in sediments and crabs were analyzed by atomic absorption spectrometer. The sediment pollution was evaluated by contamination degree (CD) and potential ecological risk index (RI). After depicting the metal pollution in sediments, metal accumulation, and contamination in benthic crab were investigated through total metal concentrations in crabs, accumulation factor (AF), correlation analysis, and regression analysis. The results exhibited substantial differences in the concentrations of Zn, Ni, Pb, Cr, and Cd among the tidal creek sediments. Contamination factors indicated that the Cd and Pb had the highest sharing in sediment pollution, and the tidal creeks classified as moderately contaminated. All metal accumulations in Dotillid crabs showed notable spatial variations, and accumulation factors (AFs) for most of the metals were > 1.0, signifying the strong bioaccumulation of metals in crabs. Particularly, Cu, Co, and Cd levels were considerably greater (two to three times) in Dotillid crabs compared to creek’s sediments, even though they don’t share any relationship between two matrixes. Hydrographical and sedimentological traits also revealed significant interactions with metal levels in sediments and crabs. A substantial association was also noticed in Fe, Ni, and Pb between sediments and crabs. Interestingly, most of the metal AFs showed a notable inverse correlation with the environmental matrix. Exceptionally, a strong positive correlation found between the Pb concentration in crabs and sediments suggested that I. frater probably acts as an indicator of Pb pollution.

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Section: Influence Of Environmental Heterogeneities (Hydrographical Amentioning

confidence: 99%

Interferences of trace metals between sediment and Dotillid crab (Ilyoplax frater) from three tidal creeks, Karachi, Pakistan

Siddiqui

Saher

2021

SN Appl. Sci.

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“…Ni is released into the marine environment from the discharge of metal industries, mining, refining, power plants, waste incinerators, and direct leaching from rocks and soil (Fishbein, 1981;Denkhaus and Salnikow, 2002). Meanwhile, Ni also is present in crude oils and, in the event of an oil spill, is released into the marine environment (Sadiq, 1989). Ni concentration in estuaries and streams generally ranges from 1 to 75 μg L -1 (Eisler, 1998) and could reach as high as 500 to 2000 μg L -1 in natural waters near industrial sites (Chau and Kulikovsky-Cordeiro, 1995).…”

Section: Introductionmentioning

confidence: 99%

Biochemical Response of the Cyclopoida Copepod Apocyclops Borneoensis Exposed to Nickel

Mohammed¹

2014

JJBS

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The use of biomarkers to evaluate the biological effects of pollutants in marine organisms represents a recent tool in biomontoring programs. The cyclopoida copepod Apocyclops borneoensis was exposed to different Ni treatments [0 (control), 10, 100, 1000 μg l-1 Ni] for 1, 2, 4, 7, 14 days. At each exposure time, acetylchlinesterase (AChE), superoxide dismutase (SOD), glutathione-S-transferase (GST), glutathione (GSH) were analyzed. Additionally, lipid peroxidation (LPO) level was measured after a 14-day exposure. The results show that Ni treatment significantly stimulated copepod's antioxidants SOD, GST and GSH at environmentally relevant concentrations after a certain exposure time. On the other hand, the exposure time significantly affected SOD and GSH. In contrast, Ni exposure significantly decreased LPO level, implying that the factor involved in LPO might not significantly depend on the operations and functions in the antioxidant defense system. In addition, Ni might also be a neurotoxic agent to copepods via changing AChE activity.

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Chemical partitioning and bioavailability of lead and nickel in an estuarine system

Babukutty

Jacob

1995

Enviro Toxic and Chemistry

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Sediments, water, and biota of an estuarine system were analyzed for concentrations of lead and nickel Sediments were sequentially extracted to obtain the different chemically extractable fractions (exchangeable, carbonate bound, Fe/Mn‐oxide bound, organically bound, and residual fractions) of these metals Concentrations of these metals in the soft tissue of an estuarine bivalve Villorita cyprinoides var cochinensis were correlated with the concentrations of these metals present in the various sediment fractions, dissolved, and particulate phases in water The degree of correlation between these various environmental variables and biological factors was considered as the index of bioavailability Metal concentrations in the soft tissue and particulate phase of water were divided by the corresponding concentrations in the dissolved phase in water to obtain the bioconcentration ratio (BCR) and metal partitioning ratio (MPR), respectively These ratios were found to be useful in quantifying the metal bioavailability The relationship between other biological factors and environmental variables is also presented and discussed

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Nickel sorption and speciation in a marine environment

Cited by 12 publications

References 23 publications

Interferences of trace metals between sediment and Dotillid crab (Ilyoplax frater) from three tidal creeks, Karachi, Pakistan

Interferences of trace metals between sediment and Dotillid crab (Ilyoplax frater) from three tidal creeks, Karachi, Pakistan

Biochemical Response of the Cyclopoida Copepod Apocyclops Borneoensis Exposed to Nickel

Chemical partitioning and bioavailability of lead and nickel in an estuarine system

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