scholarly journals Metal Bioaccumulation by Carp and Catfish Cultured in Lake Chapala, and Weekly Intake Assessment

2021 ◽  
Vol 11 (13) ◽  
pp. 6087
Author(s):  
Claudia Alvarado ◽  
Diego M. Cortez-Valladolid ◽  
Enrique J. Herrera-López ◽  
Ximena Godínez ◽  
José Martín Ramírez
Keyword(s):  
Heavy Metal ◽  
Ictalurus Punctatus ◽  
Heavy Metal Contamination ◽  
Heavy Metal Accumulation ◽  
Human Consumption ◽  
Main Concern ◽  
Metal Bioaccumulation ◽  
Lake Chapala ◽  
Cultured Fish ◽  
Metal Incorporation

Aquaculture offers great potential for fish production in Lake Chapala, but reports of heavy metal contamination in fish have identified a main concern for this activity. In the present study, cultures of the species Cyprinus carpio and Ictalurus punctatus were grown in a net cage in Lake Chapala. The patterns of heavy metal accumulation (Cu, Zn, Cd, Hg, Pb, As) in muscle and liver were monitored in order to evaluate the level of metal incorporation in the fish. Estimates of weekly metal intake (EWI) were made based on the results of the concentrations in edible parts of fish of commercial size. The patterns of metal bioaccumulation between tissues and species showed that liver had a higher concentrating capacity for Zn, Cu, Cd, and Pb. In contrast, similar concentrations of Hg and As were found in the liver and muscle tissue. According to the EWI estimates, the heavy metals in these cultured fish do not represent a risk for human consumption.

scholarly journals Heavy metal levels in cattle egrets (Bubulcus ibis) foraging in some abattoirs in Lagos State metropolis

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Elijah Abakpa Adegbe ◽  
Oluwaseyi Oluwabukola Babajide ◽  
Lois Riyo Maina ◽  
Shola Elijah Adeniji
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Accumulation ◽  
Heavy Metal Contamination ◽  
Heavy Metal Accumulation ◽  
Bubulcus Ibis ◽  
Significant Difference ◽  
Metal Levels ◽  
Lagos State ◽  
The Mean

Abstract Background Heavy metal accumulation in the ecosystem constitutes a potential toxic effect which is hazardous to human health. Increasing environmental pollution has necessitated the use of cattle egrets to evaluate the levels of heavy metal contamination, to establish their use in biomonitoring of heavy metals and to provide data for monitoring pollution in the environment. Results The present study assessed the utilization of Bubulcus ibis in monitoring pollution in five abattoirs, namely Agege, Bariga, Kara, Itire and Idi-Araba, all situated in Lagos State. The concentration of five (5) heavy metals, cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) was determined in the liver, muscle and feather of Bubulcus ibis using the atomic absorption spectrophotometer. The trend of metal accumulation was in the order: Zn > Cu > Pb > Cd > Ni for all the sampled tissues. The mean tissue concentrations of the metals were significantly different (p < 0.05) among the sites. The highest levels of metal concentration were reported in the liver in all the locations. Mean concentration of Cd in Kara (0.003 ± 0.00058) was significantly (p < 0.05) higher than those found at Agege (0.0013 ± 0.00058) and Idi-Araba (0.001 ± 0.001). A significant difference (p < 0.05) was also observed between the mean concentrations of Cu in Bariga (0.01 ± 0.001) and Idi-Araba (0.003 ± 0.001). Conclusion All the studied heavy metals were present in the liver, muscle and feathers of the cattle egrets. The contamination levels were ascertained from the study which indicated that cattle egrets are useful in biomonitoring studies and the generated data will serve as baseline data which could be compared with data from other locations for monitoring heavy metal pollution.

A Comparative Study of Heavy Metal Accumulation in Tissues of the Crested Tern, Sterna bergii, Breeding Near Industrialized and Non-Industrialized Areas

1981 ◽  
Vol 8 (3) ◽  
pp. 665 ◽  
Author(s):  
DM Howarth ◽  
AJ Hulbert ◽  
D Horning
Keyword(s):  
Heavy Metal ◽  
Metal Accumulation ◽  
Heavy Metal Contamination ◽  
Heavy Metal Accumulation ◽  
Cadmium Content ◽  
Salt Glands ◽  
Manganese Zinc ◽  
Copper Manganese ◽  
Cadmium Lead ◽  
The Individual

Tissues taken from crested terns were analysed for cadmium, lead, copper, chromium, manganese, zinc and iron. The birds were taken from a breeding colony in a non-industrialized region (North Solitary I., NNE. of Coffs Harbour, N.S.W.) and from one near an industrialized region (Big I., Port Kembla, N.S.W.). The birds from the industrialized region did not show any consistent evidence of significant heavy metal contamination when compared to those of the non-industrialized region. The individual tissues were also compared to assess the distribution of the various metals, and the relative degree to which each tissue accumulates the metals. Some accumulation of chromium, copper, manganese, lead and, to a lesser degree, cadmium and zinc was found in the salt glands. The kidneys had a relatively large cadmium content.

scholarly journals Biomonitoring of Heavy Metal Pollution Using Acanthocephalans Parasite in Ecosystem: An Updated Overview

Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 811 ◽  
Author(s):  
El-Sayed E. Mehana ◽  
Asmaa F. Khafaga ◽  
Samar S. Elblehi ◽  
Mohamed E. Abd El-Hack ◽  
Mohammed A.E. Naiel ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Industrial Revolution ◽  
Heavy Metal Contamination ◽  
Developmental Stages ◽  
Heavy Metal Accumulation ◽  
Natural Ecosystem ◽  
Parasitic Infestation ◽  
Living Organisms ◽  
Life On Earth

As a result of the global industrial revolution, contamination of the ecosystem by heavy metals has given rise to one of the most important ecological and organismic problems, particularly human, early developmental stages of fish and animal life. The bioaccumulation of heavy metals in fish tissues can be influenced by several factors, including metal concentration, exposure time, method of metal ingestion and environmental conditions, such as water temperature. Upon recognizing the danger of contamination from heavy metals and the effects on the ecosystem that support life on earth, new ways of monitoring and controlling this pollution, besides the practical ones, had to be found. Diverse living organisms, such as insects, fish, planktons, livestock and bacteria can be used as bioindicators for monitoring the health of the natural ecosystem of the environment. Parasites have attracted intense interest from parasitic ecologists, because of the variety of different ways in which they respond to human activity contamination as prospective indices of environmental quality. Previous studies showed that fish intestinal helminths might consider potential bioindicators for heavy metal contamination in aquatic creatures. In particular, cestodes and acanthocephalans have an increased capacity to accumulate heavy metals, where, for example, metal concentrations in acanthocephalans were several thousand times higher than in host tissues. On the other hand, parasitic infestation in fish could induce significant damage to the physiologic and biochemical processes inside the fish body. It may encourage serious impairment to the physiologic and general health status of fish. Thus, this review aimed to highlight the role of heavy metal accumulation, fish histopathological signs and parasitic infestation in monitoring the ecosystem pollutions and their relationship with each other.

scholarly journals ANALISIS KANDUNGAN LOGAM BERAT Pb DAN Cd DI MUARA SUNGAI MANGGAR BALIKPAPAN

2018 ◽  
Vol 12 (2) ◽  
pp. 117
Author(s):  
Godfrida Any Yusriana Dewi ◽  
Steven A Samson ◽  
Usman Usman
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Waste Disposal ◽  
Metal Contamination ◽  
Metal Content ◽  
Heavy Metal Contamination ◽  
Aquatic Organisms ◽  
The Body ◽  
Metal Bioaccumulation ◽  
Heavy Metal Bioaccumulation

Human activities around the estuary of the Manggar river in Balikpapan produce waste disposal and cause heavy metal contamination such as lead (Pb) and cadmium (Cd) in water bodies. The contaminant can endanger the life of aquatic organisms. It can also occurs heavy metal bioaccumulation in the body of the aquatic organisms. The results show that the heavy metal content of Pb and Cd in water, sediment and water biota indicated that the estuary of the Manggar River was contaminated by heavy metals. The content of Pb and Cd in water is 0.276 mg/l and 0.020 mg/l, in sediments is 24.7 mg/kg and 4.52 mg/kg, and in the biota is 4.20 mg/kg and 0.80 mg/kg. This means that fish and shells taken from the waters around the estuary of the Manggar River are not safe for consumption because they can interfere the human health.

scholarly journals Effects and Mechanisms of Microbial Remediation of Heavy Metals in Soil: A Critical Review

2018 ◽  
Vol 8 (8) ◽  
pp. 1336 ◽  
Author(s):  
Yuyao Jin ◽  
Yaning Luan ◽  
Yangcui Ning ◽  
Lingyan Wang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Accumulation ◽  
Heavy Metal Contamination ◽  
Heavy Metal Accumulation ◽  
Future Research ◽  
Ecological Benefits ◽  
Factors Influencing ◽  
Primary Mechanism ◽  
Microbial Remediation

The use of microbes to change the concentration of heavy metals in soil and improve the ability of plants to deal with elevated metals concentrations has significant economic and ecological benefits. This paper reviews the origins and toxic effects of heavy metal pollution in soil, and describes the heavy metal accumulation mechanisms of microbes, and compares their different bioconcentration abilities. Biosorption, which depends on the special structure of the cell wall, is found to be the primary mechanism. Furthermore, Escherichia coli are found to adsorb more heavy metals than other species. Factors influencing microbial treatment of wastewater and soil containing heavy metals include temperature, pH, and different substrates. Finally, problems in the application of microbial treatment of heavy metal contamination are considered, and possible directions for future research are discussed.

scholarly journals Communities of oribatid mites and heavy metal accumulation in oribatid species in agricultural soils in Egypt impacted by waste water

2010 ◽  
Vol 46 (No. 4) ◽  
pp. 159-170 ◽  
Author(s):  
H.M. El-Sharabasy ◽  
A. Ibrahim
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Agricultural Land ◽  
Heavy Metal Contamination ◽  
Agricultural Soils ◽  
Diversity Index ◽  
Heavy Metal Accumulation ◽  
Oribatid Mites ◽  
The Body

The continued use of waste water for irrigation of agricultural fields in Egypt may lead to accumulation of heavy metals in soils and adverse effects on soil-living communities. We investigated responses of oribatid communities to heavy metal contamination in mango plantations irrigated by the Ismailia canal in the Suez region. Mean concentrations of heavy metals determined in irrigation water were considerably above the recommended levels. Concentrations of metals in agricultural soil were however below the permissible levels. A comparison with concentrations of a typical uncontaminated soil in this area revealed that the Ismailia water canal used for irrigation of agricultural land has elevated levels of heavy metals. The results of our ecological survey showed that the abundance and structure of the soil oribatid communities were not influenced by levels of heavy metals in the soil. We also showed that the diversity index can be a valuable tool for assessing the possible impact of pollutants on different species of oribatid mites. The oribatid species appeared to be accumulating different amounts of heavy metals when characterised by their bioconcentration factors. Most species were poor zinc accumulators. The accumulation of heavy metals in the body of oribatids was not strictly determined by their body size or by the trophic level. In conclusion, our study showed that mango plantations impacted by waste water from the Ismailia canal are accumulating heavy metals in their soils above the background concentrations, but ecological effects on soil-living communities are not apparent yet.

scholarly journals Heavy metals in waters used for human consumption and crop irrigation

2018 ◽  
Vol 13 (4) ◽  
pp. 1
Author(s):  
Laercio Santos Silva ◽  
Izabel Cristina de Luna Galindo ◽  
Clístenes Wilians Araújo do Nascimento ◽  
Romário Pimenta Gomes ◽  
Ludmila de Freitas ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Heavy Metal Contamination ◽  
Monitoring Program ◽  
Seasonal Effect ◽  
Human Consumption ◽  
Contaminated Water ◽  
Vegetable Crops ◽  
Ni Content ◽  
Animal Consumption ◽  
Crop Irrigation

The consumption of contaminated water is a major source of heavy metal contamination in humans and animals. This study therefore aimed to assess Cd, Cu, Mn, Ni, Pb, and Zn levels in water used for human and animal consumption and vegetable crop irrigation in Camocim de São Félix, Pernambuco, Brazil. Water samples were collected on the studied farms from an artesian well and reservoirs used for human and animal consumption as well as for crop irrigation. The results showed that concentrations of Cd (> 0.001 mg L-1), Ni (> 0.025 mg L-1) and Pb (> 0.01 mg L-1) were above the maximum allowable limits established under Brazilian law, indicating the need for a preventive monitoring program and immediate intervention initiatives aimed at the sources of contamination. The results demonstrate the need to quantify heavy metal content in vegetable crops, since their contamination by irrigation water may make them harmful to human health. Rainfall has a seasonal effect on heavy metal concentrations in water, showing a significant effect on Pb levels, whereas Cd and Ni content was less dependent on seasonal variation.

scholarly journals An Assessment of the Bivalve Perna viridis, as an Indicator of Heavy Metal Contamination in Paradise Point of Karachi, Pakistan

2016 ◽  
Vol 59 (3) ◽  
pp. 164-171
Author(s):  
Rashida Qari ◽  
Olufemi Ajiboye ◽  
Saima Imran ◽  
Abdul Rahim Afridi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Contamination ◽  
Soft Tissues ◽  
Heavy Metal Contamination ◽  
Human Consumption ◽  
Perna Viridis ◽  
High Accumulation ◽  
Accumulation Of Metals ◽  
Mn Concentrations

The edible bivalves Perna viridis (green mussel), (n = 100) were analysed for their total Hg,Pb, Cu, Ni, Zn, Co, Fe, Cr, Cd, and Mn concentrations to indicate heavy metal contamination in ParadisePoint of Karachi coast using atomic absorption spectrophotometer. There are large seasonal variations inthe metal concentrations of Mn (0.025-0.67 µg/g), Fe (0.055-7.740 µg/g), Ni (0.004-0.52 µg/g), Hg (0.0001-0.004 µg/g), Zn (0.04-3.32 µg/g), Cu (0.008-1.66 µg/g), Pb (0.022-2.43 µg/g), Co (0.01-0.044 µg/g), Cd(0.04-0.88 µg/g) and Cr (0.13-1.20 µg/g) recorded in bodies/soft tissues of P. viridis obtained in the samplesof the year 1993 and 2012 at the Paradise Point of Karachi coast. The results of heavy metals are in thefollowing descending order of concentration in the samples collected in the year 1993: Fe>Cr>Zn>Mn>Pb>Cd>Cu>Ni>Co>Hg, while Fe>Zn>Pb>Cu>Cr>Cd>Mn>Ni>Co>Hg order was recorded in samplescollected in the year 2012. The high accumulation of metals was found mostly in the samples collectedin the year 2012 when compared with the samples of the year 1993. This is an indication that the areaunder study showed signs of being exposed to significant levels of heavy metal pollution due to directdischarge of industrial and domestic wastes along the coast. The concentrations of these heavy metals werelower than the permissible limits for human consumption. However, if this pollution persists, it can proveto be very detrimental in future.

scholarly journals The Evaluation of Heavy Metal Accumulation in Whiting Fish (Merlanguis merlangus euxinus Nordmann, 1840), a Local and Economic Species of the Central Black Sea Region

2021 ◽  
Vol 9 (4) ◽  
pp. 683-688
Author(s):  
Oylum Gökkurt Baki
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Black Sea ◽  
International Organizations ◽  
Heavy Metal Accumulation ◽  
Human Consumption ◽  
Visceral Organ ◽  
Limit Values ◽  
Black Sea Region ◽  
Central Black Sea Region

The present study aimed to determine the heavy metal cadmium (Cd), chromium (Cr), nickel (Ni), lead (Pb) and mercury (Hg) accumulations in muscle tissues, gills, gonads, liver, and other visceral organs (liver) of whiting fish (Merlanguis merlangus euxinus Nordmann, 1840) samples obtained by hunting from the Sinop (Black Sea) coasts. The mean cadmium value in muscle tissue, which concerns public health, was found to be 1.07±0.02 µg.kg-1, the chromium value was found to be 1.48±0.07 µg.kg-1, the nickel value was found to be 1.77±0.14 µg.kg-1, the lead value was found to be 5.38±0.29 µg.kg-1 while the mercury value was determined only in the gill and could not be determined in organs, and since it was below the limit values declared by international organizations for all metals, it was determined that it would not create adverse effects for human consumption. Also, examining the order of accumulation of heavy metals in tissues and organs from highest to lowest, it was sorted as liver> visceral organ> gill> muscle> gonad for cadmium; visceral organ> gill> muscle> liver> gonad for chromium; visceral organ> gill> liver> muscle> gonad for nickel; gill> visceral organ> liver> muscle> gonad for lead, while the mercury accumulation was detected only in the gill. Also, the data obtained as a result of the analyses made in the gonad is an important determination in terms of the effects of heavy metals on the reproduction of the species, as well as on the continuity of the population. Since the values determined in the other analyzed tissues were below the limit values reported by international organizations, the results showed that they do not pose any threat to human health in terms of workplace and time, type, and determined heavy metals.

scholarly journals Heavy metal concentrations in vegetables cultivated and sold in Machakos Municipality, Kenya

2021 ◽  
Vol 24 (12) ◽  
pp. 2027-2034
Author(s):  
R.M. Tomno ◽  
L. Kitulu ◽  
J.K. Nzeve ◽  
F. Waswa ◽  
S.N. Mailu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Contamination ◽  
Public Awareness ◽  
Urban Stream ◽  
County Government ◽  
Human Consumption ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
The Mean

Heavy metal contamination of vegetables is a key aspect of food quality assurance since vegetables form a substantial proportion of the daily human diet. Health risks in urban populations due to exposure to heavy metals are on the increase because of the consumption of vegetables irrigated with wastewater. This study analyzed the concentration of Cd, Cu, Pb, Zn and Cr in spinach and kales grown using contaminated water of the Mitheu urban stream and those sold within Machakos municipality. Vegetable samples were collected once per month for a period of four months starting from June to September 2019. The mean heavy metal concentrations obtained were0.013 – 3.19 mg/kg, 0.468 – 1.706 mg/kg, 0.02 – 0.368 mg/kg, 5.78 – 26.7 mg/kg, and 0.104 – 14.0 mg/kg for Cd, Cu, Pb, Zn and Cr respectively in kale samples from the different sampling sites. The heavy metal mean concentrations in spinach were 0.055 – 0.575 mg/kg, 3.79 – 5.55 mg/kg, 0.098 – 1.49 mg/kg, 8.32 – 20.7 mg/kg and 0.368 – 4.43 mg/kg for Cd, Cu, Pb, Zn and Cr respectively. The mean concentrations of Cd, Pb, Zn and Cr in both spinach and kales in some of the sampling sites were above WHO permissible levels for heavy metals in vegetables for human consumption. However, the mean concentration of Cu was below WHO recommended levels. Consumption of these vegetables therefore poses a health risk to the consumers. There is need to create public awareness on the dangers of consuming contaminated vegetables. Additionally, measures to curb heavy metal pollution in Mitheu stream should be taken by the County Government of Machakos.

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