The precipitation of fluoride, calcium and magnesium minerals from Egyptian Mediterranean Sea coast in relation to discharged waters

El‐Said, Ghada F.; Shaltout, Nayrah A.; Moneer, Abeer A.; El-Sadaawy, Manal M.; Morsy, Amal M.H.

doi:10.1080/19443994.2014.979243

Cited by 14 publications

(6 citation statements)

References 37 publications

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“…e significant correlation between SO 4s and Mg w (r � 0.706, p ≤ 0.010) and Li w (r � 0.633, p ≤ 0.027) may be associated to the formation of Mg-sulfate and the pollution of sediments by discharged waters containing excessive sulfate and Li [89]. In the contrary, the strong positive correlation between TP s and Cu s and between TPs and Zn s may be related to the same source of polluted discharge water [23,83].…”

Section: Interactions Of Halogens and Tested Variables Inmentioning

confidence: 96%

“…e negative moderate relation of F w and I p (r � 0.606, p ≤ 0.037) may indicate replacement of iodine in pore water by fluoride of the surface water. e moderate relationship between fluoride in surface water and CO 3w (r � −0.632, p ≤ 0.027) and HCO 3w (r � 0.593, p ≤ 0.042) may be related to carbonate exchange and the formation of fluorite minerals (CaF 2 ) [23].…”

Section: Interactions Of Halogens and Tested Variables Inmentioning

confidence: 99%

“…e Saturation Index (SI) of 23 and 15 structures in surface water and pore water samples were calculated respectively [23,48].…”

Section: Saturation Index (Si)mentioning

confidence: 99%

“…It can be calculated from the division of the product of the molar concentrations (IAP; [49]) of their component by their equilibrium solubility constant (Table 1 [23,48]:…”

Section: Saturation Index (Si)mentioning

confidence: 99%

“…Fluoride has been recorded an abnormal concentration in the seawater along the Mediterranean coast of Egypt. In addition to the large amount of minerals that may be dissolved in the sediment-water interface, the Mediterranean coast of Egypt is also adversely affected by raw sewage, domestic, agricultural, and industrial waste [23]. Bromine is used in the manufacture of agricultural pesticides, disinfectants, film photography, lamps, dyes, textiles, cosmetics, etc.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous Fluctuation of Halogens in Relation to the Pollution Status along Lake Mariout, Egypt

El‐Said

Zokm

El-Sayed

et al. 2020

Journal of Chemistry

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This paper aimed to study the anomalous fluctuation of halogens with respect to the pollution status in surface water (w), pore water (p), and sediments (s) of Lake Mariout. It provided a framework for understanding the distribution of dissolved and precipitated halogen salts related to the pollution status of the lake. The study cleared out that bromide was only the most abundant halogen in the three studied partitions. On contrast, sediment’s partition contained the lowest chloride content. Fluoride minerals, especially, fluorapatites and carbonate-fluorapatite (FAP and CFAP), had high Saturation Index (SI) values in surface water (42.77–51.95 and 16.04–60.89, respectively) and in pore water (51.26–54.60 and 17.52–78.33, respectively). Bromide and chloride were mainly found in the soluble forms in the surface water and pore waters. Iodide salts, (Ca(IO3)2 and Ca(IO3)2.6H2O), were moderately precipitated in surface and pore waters. Thus, SI content reflected that halogens, especially fluoride and iodide, played a vital role in reducing lake pollution. Fluorite (CaF2) and sellaïte (MgF2) could only be formed in pore water, while calcite and aragonite could be deposited from surface water. In addition, Cl was mainly found in the forms of NaCl, CaCl2, MgCl2, and KCl in surface and pore waters. The multivariate analysis revealed that fluoride precipitate may serve in decreasing the dissolved salt pollution. Multivariate analysis showed that in the long run, the fluoride precipitation in FAP and CFAP can significantly adsorb and absorb various pollutants and can protect the lake from pollution. The ecological risk assessment conducted by calculating the enrichment factor (EF) showed that the lake was still unpolluted. Regarding human health risks, at appropriate levels of human health and safety, the hazard quotient (HQ) and hazard index (HI) of halogens found to be lower than these reported levels. Hence, ingestion and dermal absorption routes of halogens by surface water and sediments did not pose any adverse effects to population reflecting uncontaminated status of Lake Mariout.

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Section: Interactions Of Halogens and Tested Variables Inmentioning

confidence: 96%

Section: Interactions Of Halogens and Tested Variables Inmentioning

confidence: 99%

“…e Saturation Index (SI) of 23 and 15 structures in surface water and pore water samples were calculated respectively [23,48].…”

Section: Saturation Index (Si)mentioning

confidence: 99%

“…It can be calculated from the division of the product of the molar concentrations (IAP; [49]) of their component by their equilibrium solubility constant (Table 1 [23,48]:…”

Section: Saturation Index (Si)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anomalous Fluctuation of Halogens in Relation to the Pollution Status along Lake Mariout, Egypt

El‐Said

Zokm

El-Sayed

et al. 2020

Journal of Chemistry

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The Egyptian Nile estuarine habitats: a review

Abdelsalam,

Tadros,

Moneer

et al. 2024

Aquat Sci

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Estuaries are nutrient-rich environments characterized by a gradient in salinity due to the mixing of freshwater and seawater. These bodies of water play vital functions in nature and provide a wide variety of essential ecosystem services. In general, many natural and/or man-made activities have strongly stressed the Egyptian Nile estuarine habitats, as has the water shortage that was expected after the construction of the Grand Ethiopian Renaissance Dam. In recent decades, the Nile Delta has been considered to be one of the most important productive oil-producing petroleum regions due to onshore and offshore gas discoveries alongside gasoline and base oil generation. Up-to-date systematic reviews of the Egyptian estuarine habitats (Rosetta and Damietta) are missing, and the review reported here was undertaken to fill this gap. In this review, we consider the physical, chemical, geological, pollution, and biological parameters of Egyptian Nile estuaries. In this context, our aim is to contribute to a broader understanding of the Egyptian estuarine habitat; moreover, we provide potential warning signals that may aid in estuarine environmental protection. We found that most of the previous studies had focused on the two branches of the Nile or on the marine waters adjacent to these branches, and that only a few studies focused on the estuarine habitats themselves. In most of these previous studies, the salinity gradient of water was reported to be a significant factor in the distribution of the different measured parameters while, in contrast, more recent investigations confirm the importance of potential effluent sources in affecting the distribution of these parameters. We highly recommend that the data reported here be updated in future studies on different environmental aspects.

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Spatiotemporal distribution of some dissolved salts and minerals in Lake Edku connected to Mediterranean Sea: in relation to different pollutant inputs

El‐Said

El-Sadaawy

Shaltout

et al. 2021

Environ Monit Assess

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The precipitation of fluoride, calcium and magnesium minerals from Egyptian Mediterranean Sea coast in relation to discharged waters

Cited by 14 publications

References 37 publications

Anomalous Fluctuation of Halogens in Relation to the Pollution Status along Lake Mariout, Egypt

Anomalous Fluctuation of Halogens in Relation to the Pollution Status along Lake Mariout, Egypt

The Egyptian Nile estuarine habitats: a review

Spatiotemporal distribution of some dissolved salts and minerals in Lake Edku connected to Mediterranean Sea: in relation to different pollutant inputs

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