scholarly journals Bioaccumulation of heavy metals in the tissues of Schizothorax plagiostomus at River Swat

2022 ◽  
Vol 82 ◽  
Author(s):  
M. Shah ◽  
S. Kausar ◽  
J. A. Mian ◽  
H. Jabeen ◽  
N. Ullah ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Nitric Acid ◽  
Perchloric Acid ◽  
Tissue Type ◽  
High Concentration ◽  
Northern Areas ◽  
Snow Trout ◽  
Lead Nickel ◽  
Schizothorax Plagiostomus

Abstract Snow trout (Schizothorax plagiostomus) is an economically important freshwater fish, mostly found in northern areas of water reservoirs of Pakistan. The current study was conducted in River Swat to analyze the bioaccumulation of heavy metals (Pb, Cr, Ni, and Zn) in tissues of Schizothorax plagiostomus. Tissues were extracted and dissolved in perchloric acid (HClO4) and nitric acid (HNO3) along with hotplate. The heavy metals, zinc (Zn), lead (Pb), chromium (Cr), and Nickel (Ni) were determined using Perkin Elmer 2380 atomic absorption spectrophotometer. Results shows great variation in the content of the metal related to tissue type and sampling sites. A high concentration of bioaccumulation was reported at Charbagh, whereas lowest at Odigram: Charbagh>Landakai>Odigram. In the same way, Cr was the most accumulated heavy metal followed by lead, nickel, and Zinc:

Heavy metals other than lead in flaked paints from buildings in Eastern Nigeria

2007 ◽  
Vol 23 (9) ◽  
pp. 525-528 ◽  
Author(s):  
JKC Nduka ◽  
OE Orisakwe ◽  
CA Maduawguna
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Nitric Acid ◽  
Atomic Absorption ◽  
Perchloric Acid ◽  
Iron Level ◽  
Port Harcourt ◽  
Pass Through ◽  
Zinc Levels ◽  
Metal Burden

Cadmium, chromium, iron, zinc, and copper levels of flaked paints collected from fifty buildings of four major cities – Enugu, Onitsha, Aba, and Port Harcourt in Eastern Nigeria were studied. Fifty samples of the flaked paints were ground with laboratory pestle and mortar, 2 g of fine ground paints that could pass through a 0.5-mm sieve were digested with 15 ml concentrated nitric acid and perchloric acid at a ratio of 1:1 and analyzed for cadmium, chromium, iron, zinc and copper using atomic absorption spectrophotometer 500. Cadmium ranged from 9.032 ± 0.000 to 10.575± 0.000 and 6.845 ± 0.000 to 10.028 ± 0.002 mg/kg in Enugu and Onitsha, respectively. In Aba and Port Harcourt, the levels of cadmium ranged 7.464 ± 0.002–9.343 ± 0.002 and 7.293 ± 0.002–9.395 ± 0.000 mg/kg, respectively. Chromium levels were significantly lower in Enugu (range 0.940 ± 0.000–12.793 ± 0.002 mg/kg) when compared with the values from other cities namely Onitsha (range 1.613 ± 0.002–15.140 ± 0.000 mg/kg), Aba (range 15.206 ± 0.000–39.215 ± 0.000 mg/kg) and Port Harcourt (range 33.118 ± 0.002–55.418 ± 0.002 mg/kg). The highest levels (mg/kg) of iron (11 908.150 ± 0.000), zinc (31.508 ± 0.002) and copper (7.588 ± 0.002) were seen in buildings from Enugu aged 11 years and above. The iron level (mg/kg) ranged from 1391.750 ± 0.000 to 10 476.845 ± 0.000, 1450.176 ± 0.000 to 11 580.750 ± 0.000 and 3314.913 ± 0.002 to 8162.333 ± 0.002 in Onitsha, Aba, and Port Harcourt, respectively. Zinc levels were significantly lower in Onitsha than in Aba and Port Harcourt. Age of building did not seem to affect the levels of these metals namely iron, zinc and copper from these cities. This study shows that flaked paints increase the environmental heavy metal burden in Nigeria.

ASSESSMENT OF HEAVY METAL CONCENTRATION IN COCONUT WATER

1970 ◽  
pp. 07-10
Author(s):  
MdDidarul Islam, Ashiqur Rahaman, Aboni Afrose
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Concentration ◽  
Coconut Water ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Toxic Heavy Metal ◽  
Low Concentration ◽  
Wet Ashing ◽  
Aas Method

This study was based on determining concentration of essential and toxic heavy metal in coconut water available at a local Hazaribagh area in Dhaka, Bangladesh. All essential minerals, if present in the drinking water at high concentration or very low concentration, it has negative actions. In this study, fifteen samples and eight heavy metals were analyzed by Atomic Absorption Spectroscopy (AAS) method which was followed by wet ashing digestion method. The concentration obtained in mg/l were in the range of 0.3 to 1.5, 7.77 to 21.2, 0 to 0.71, 0 to 0.9, 0 to 0.2, 0.9 to 17.3, 0.1 to 0.9, 0 to 0.9 and 0 to 0.7 for Fe, Ni, Cu, Cd, Cr, Zn, Pb and Se respectively. From this data it was concluded that any toxic heavy metals like Cd, Cr, Pb and Ni exceed their toxicity level and some essential nutrients were in low concentration in those samples. 

scholarly journals Isolation and Identification of Heavy Metal Tolerant Bacteria from Tannery Effluents

2016 ◽  
Vol 29 (1) ◽  
pp. 23-26
Author(s):  
M Iqbal Hossain ◽  
M Nural Anwar
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Bacillus Coagulans ◽  
Bacillus Firmus ◽  
Chemical Parameters ◽  
High Concentration ◽  
Isolation And Identification ◽  
Tannery Effluents ◽  
Physical And Chemical ◽  
Metal Tolerant Bacteria

The aim and objective of the study was to isolate and characterize heavy metal tolerant microorganisms from tannery effluents. Six effluent samples were collected aseptically and their physical and chemical parameters were determined. A total of 40 bacterial colonies were isolated from these effluent samples. Among them, six bacterial isolates were characterized provisionally as Alcaligenes aquamarinus, Bacillus coagulans, Bacillus firmus, Enterobacter cloacae, Pseudomonas alcaligens and Pseudomonas mendocina based on morphological, cultural and biochemical characteristics. The survibality and tolerance to heavy metals (Cr and Cu) of these isolates were examined. All the isolates were found to grow at high concentration of CuSO4 (95ppm/ml) and varying degrees of chromium (K2Cr2O7). The highest tolerance was shown by Alcaligenes aquamarinus. These heavy metal tolerant organisms could be potential agents for bioremediation of heavy metals polluted environment.Bangladesh J Microbiol, Volume 29, Number 1, June 2012, pp 23-26

Isolation and characterization of heavy metal tolerant Gram-positive bacteria with bioremedial properties from municipal waste rich soil of Kestopur canal (Kolkata), West Bengal, India

Biologia ◽  
2012 ◽  
Vol 67 (5) ◽  
Author(s):  
Kamala Gupta ◽  
Chitrita Chatterjee ◽  
Bhaskar Gupta
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Tolerance ◽  
Environmental Pollutants ◽  
Heavy Metal Tolerance ◽  
Antibiotic Sensitivity ◽  
Bacterial Strains ◽  
High Concentration ◽  
Isolation And Characterization ◽  
Bacillus Weihenstephanensis

AbstractThe present study was conducted to determine the culturable bacterial profile from Kestopur canal (Kolkata, India) and analyze their heavy metal tolerance. In addition to daily sewage including solid and soluble wastes, a considerable load of toxic metals are released into this water body from industries, tanneries and agriculture, household as well as health sectors. Screening out microbes from such an environment was done keeping in mind their multifunctional application especially for bioremediation. Heavy metals are major environmental pollutants when present in high concentration in soil and show potential toxic effects on growth and development in plants and animals. Some edible herbs growing in the canal vicinity, and consumed by people, were found to harbour these heavy metals at sub-toxic levels. The bioconcentration factor of these plants being <1 indicates that they probably only absorb but not accumulate heavy metals. All the thirteen Grampositive bacteria isolated from these plants rhizosphere were found to tolerate high concentration of heavy metals like Co, Ni, Pb, Cr, Fe. Phylogenetic analysis of their 16S rDNA genes revealed that they belonged to one main taxonomic group — the Firmicutes. Seven of them were found to be novel with 92–95% sequence homology with known bacterial strains. Further microbiological analyses show that the alkaliphilic Bacillus weihenstephanensis strain IA1 and Exiguobacterium aestuarii strain CE1, with selective antibiotic sensitivity along with high Ni2+ and Cr6+ removal capabilities, respectively, can be prospective candidates for bioremediation.

Assessment of Adverse Effects of Lead, Nickel and Cadmium on Biochemical Parameters, Antioxidants Status and Metallothionein Expression in Buffaloes Slaughtered at Local Abattoir

2021 ◽  
Author(s):  
Himalaya Bhardwaj ◽  
Chanchal Singh ◽  
Shashi Nayyar
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Adverse Effects ◽  
Biochemical Parameters ◽  
Maximum Level ◽  
Lactic Dehydrogenase ◽  
Atomic Absorption Spectrophotometry ◽  
Health Concern ◽  
Control Group ◽  
Lead Nickel

Background: With the pace of industrialization, heavy metal level has been increasing in animals thereby causing deleterious effects, which emanate as public health concern, associated with their accumulation in food chain. The present study was undertaken to assess the systemic damage caused by heavy metals in buffaloes. Methods: The assessment of adverse effects of the lead (Pb), nickel (Ni) and cadmium (Cd), in blood was determined by monitoring the levels of biochemical parameters, antioxidants and expression of metallothionein in buffaloes. Blood and tissue (liver, kidney, pancreas and ovary) samples (n=50) were collected from local abattoir to estimate the levels of lead, nickel and cadmium using atomic absorption spectrophotometry. Antioxidants and biochemical parameters were estimated using standard procedures and while the expression of metallothionein-2 was analyzed using real-time PCR.Result: After determining the concentration of heavy metals in samples the buffaloes were classified as heavy metal exposed and non-exposed groups. The plasma level of heavy metals were found to be significantly (p less than 0.05) higher than the permissible limit in exposed buffaloes. In tissues, heavy metals levels were within the permissible limits. Malondialdehyde level in each of lead, nickel and cadmium exposed groups was significantly (p less than 0.05) higher than the non-exposed, control group. The antioxidant activity of superoxide dismutase, catalase and glutathione was found to be increased significantly (p less than 0.05) in exposed groups. Also, plasma glucose, cholesterol, aspartate transaminase (AST), alanine transaminase (ALT), alkaline phosphatase (ALP), lactic dehydrogenase (LDH), creatine kinase (CK), urea and creatinine levels were found to be significantly higher (p less than 0.05) in the blood of the animal model used for the study. The fold change expression of MT-2 in blood was found to be at maximum level in cadmium and minimum in nickel exposed buffaloes. It can be concluded from the results of the experiment that heavy metals affect major organs (liver, kidney and muscle etc.) as evident by altered intracellular expression of MT-2, antioxidants and biochemical parameters.

scholarly journals High Concentration of Heavy Metal and Metalloid Levels in Edible Campomanesia adamantium Pulp from Anthropic Areas

2021 ◽  
Vol 18 (11) ◽  
pp. 5503
Author(s):  
David Johane Machate ◽  
Elaine S. de Pádua Melo ◽  
Daniela G. Arakaki ◽  
Rita de Cássia Avellaneda Guimarães ◽  
Priscila Aiko Hiane ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Health Risks ◽  
Chemical Elements ◽  
Hazard Quotient ◽  
Icp Oes ◽  
High Concentration ◽  
Microwave Assisted ◽  
Total Cancer ◽  
Metals And Metalloid

This study aimed to quantify the extent of heavy metal, non-metal and metalloid levels in the Campomanesia adamantium pulp obtained from an area crossed by road experiencing high large vehicle traffic and intensive agriculture modern farming, to monitor the health risks associated with pulp consumption by humans. For this purpose, in three spots located within this area, ripe fruits were collected on the roadside, bush and farm-margin. Pulp samples were digested by microwave-assisted equipment, and chemical elements were quantified by ICP OES. The concentrations of K, Pb, Se, Fe, Mo, Zn, Co, Ni and Mn in the pulp collected in roadside/bush points showed statistical differences (p < 0.05). The heavy metals and metalloid concentrations that exceeded FAO/WHO standards were ordered Pb > As > Mo > Co > Ni > Mn > Cr. Therefore, among these metalloid and heavy metals, As, Pb and Cr were found to be higher in farm-margin > roadside > bush (1.5 × 10−3, 1.1 × 10−3 and 6.2 × 10−4), respectively. Therefore, As is the most important metalloid with higher levels in farm-margin, roadside and bush (1.5 × 10−3, 1.0 × 10−3 and 6.0 × 10−4 > 10−6–10−4 and 3.33, 2.30 and 1.34 > 1), respectively, to total cancer risk and hazard quotient, if 10 g daily of pulp are consumed.

scholarly journals Monitoring of heavy metal contamination of soil and plants (for example, Potentilla tanacetifolia Willd. ex Schlecht.) of natural ecosystems in Chita urban areas

2018 ◽  
Vol 7 (1) ◽  
pp. 110-115
Author(s):  
Galina Yurievna Samoilenko ◽  
Evgeniy Aleksandrovich Bondarevich ◽  
Natalia Nikolaevna Kotsyurzhinskaya ◽  
Igor Anatolyevich Boriskin
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Urban Areas ◽  
Heavy Metal Contamination ◽  
Soil Samples ◽  
Natural Ecosystems ◽  
High Concentration ◽  
Mobile Forms ◽  
Zinc Cadmium ◽  
Cadmium Lead

The paper presents data on the content of gross and mobile forms of zinc, cadmium, lead and copper in the soils of Chita and its surroundings. The paper contains a comparative analysis of the accumulation (Kn) and movement (KP) coefficients of these microelements in organs ( Potentilla tanacetifolia Willd. ex Schlecht.), relative to their gross content and mobile forms in soils. The authors have revealed that soil samples of the studied sites contain unequal gross amount of heavy metals. In some points (6 and 3) the content of cadmium and zinc exceeded the Mac, that is why such soils have been attributed to heavily polluted. The index of biological activity on mobile forms of heavy metals in all sites significantly exceeded the same index on gross forms. It was found that Potentilla tanacetifolia are accumulators of heavy metal ions. Aboveground bodies accumulate and absorb cadmium and copper especially intensively, thus the content of mobile forms of these metals in the soil is insignificant. Excessive adsorption of trace elements in the phytomass of plants can be connected with surface contamination. According to the content of zinc and lead, the accumulation values in the organs of P. tanacetifolia were characterized by small coefficient values, against the background of their high concentration in the soil.

scholarly journals An analysis of some heavy metals in the water, sediments and some fishery organisms from Yewa Lagoon, Nigeria

2020 ◽  
Vol 42 (1) ◽  
pp. 228-232
Author(s):  
I. O. Taiwo ◽  
O. A. Olopade ◽  
A. F. Gafar
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Environmental Samples ◽  
Metal Content ◽  
Heavy Metal Content ◽  
High Concentration ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
Fishing Villages ◽  
Cu And Zn

The concentration of heavy metals(Zn, Ni, Pb, Cd and Cu) in the muscle of three fishery organisms (Chrysicththysnigrodigitatus, Sarotherodongalilaeus and Peneausmonodon)and in environmental samples of waterand sediment were tested in Yewa Lagoon, Nigeria. Five fishing villages along the lagoon were selected as the sample sites where these metals were tested. The heavy metal content in the muscle of the fishery organisms was Zn > Ni >Pb> Cu > Cd;Zn > Ni >Pb> Cd > Cu and Zn > Ni >Pb> Cd > Cu inC.nigrodigitatus, S.galilaeus and P.monodon respectively. The heavy metal concentrations in the sediment was Zn >Pb> Cu > Ni > Cd. However, nickel and cadmium were not present in the water at two sampling sitesof Yewa Lagoon.The water of Yewa Lagoon is polluted with all the five heavy metals which were all higher than the WHO standard. The concentration of Zinc in the fishery organisms were below the WHO standard. However, the high concentration of zinc in the water (which is well above the WHO standard) could be associated with the fact that zinc is naturally abundant in Nigeria soils.

scholarly journals DISTRIBUTION AND BIOACCUMULATION OF HEAVY METALS Pb AND Cd ON BIVALVES Anadara nodifera, Meretrix lyrata, AND Solen lamarckii IN COASTAL WATERS OF THE WEST MADURA STRAIT

2018 ◽  
Vol 9 (2) ◽  
pp. 631-643 ◽  
Author(s):  
. Ahyar ◽  
Dietriech G. Bengen ◽  
Yusli Wardiatno
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Coastal Waters ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Quality Standards ◽  
High Concentration ◽  
Metal Analysis ◽  
The West ◽  
Negative Impacts

Madura strait receives waste disposal from various activites in the mainland, making it vulnerable to contamination of harmful pollutants. Some of the harmful pollutants are heavy metal Pb and Cd. The high concentration Cd and Pb give negative impacts to the biota including bivalves. This study was conducted to assess the distribution of heavy metals Pb and Cd in the waters and their accumulation in bivalves Anadara nodifera, Meretrix lyrata, and Solen lamarckii in coastal waters of the West Madura Strait. Heavy metal analysis refer to APHA 2012 using AAS. The results showed that concentration of Cd and Pb in water were below the quality standards, while in sediment were above the standard (Cd of 7.20 mg/kg and Pb of 62.06 mg/kg). The concentration of Cd in bivalve were different among the species tested A. nodifera of 6.10 mg/kg, M. lyrata of 3.65 mg/kg, and S. lamarckii of 2.74 mg/kg, as well as Pb concentration A. nodifera of 60.10 mg/kg, M. lyrata of 51.48 mg/kg, and S. lamarckii of 45.29 mg/kg). These results indicated that the three shells have exceeded the maximum limit of heavy metal contamination in food (Cd of 1.0 mg/kg and Pb of 1.5 mg/kg). Keywords: bivalve, heavy metal, Madura Strait

scholarly journals Response of Human Alveolar Epithelial (hAELVi) Cells to Heavy Metals in Airborne Particulate

2021 ◽  
Author(s):  
Hui-Fang Chang ◽  
Ji-Yen Cheng
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ion ◽  
Epithelial Cell Line ◽  
Ros Production ◽  
High Concentration ◽  
Permeable Membrane ◽  
Alveolar Epithelial ◽  
Human Lung Cells

Abstract In vitro human alveolar models provide a platform to investigate the cellular behavior and activity of human lung cells for toxicity assays. However, there has been relatively rare research on the new human alveolar epithelial cell line (hAELVi) for the toxicity induced by heavy metal ions. In this study, hAELVi cells were exposed to various concentrations of Cd, As, and Zn for 24h. The morphological changes of hAELVi cells were observed after exposure to heavy metals. A high concentration of Cd, As, and Zn led to cell death. However, the cytotoxicity was not reflected by the transepithelial electrical resistance (TEER) value after exposure to 250 μM of As and Zn. In addition, Cd at a concentration of 200 μM induced the significant production of TNF-α whereas As and Zn did not induce observable secretion of the cytokine. On the contrary, a high concentration of Cd, As, and Zn inhibited the production of IL-6. In addition, there is not a direct relationship between the metal ion cytotoxicity and the ROS production in the hAELVi cells. Accordingly, this study contributes to elucidating the cytotoxicity, TEER variation, ROS production, and cytokine secretion of hAELVi cells to acute exposure to heavy metal in vitro. The discrepancy between the cytotoxicity and the TEER result suggests that hAELVi cell cultured on permeable membrane exhibit very different behavior, which is worth pursuing.

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