scholarly journals Monitoring and assessment of sediment contamination with toxic heavy metals: case study of industrial effluent dispersion in Alaro River, Nigeria

2018 ◽  
Vol 8 (6) ◽  
Author(s):  
A. R. Ipeaiyeda ◽  
P. C. Onianwa
Keyword(s):  
Heavy Metals ◽  
Industrial Effluent ◽  
Sediment Contamination ◽  
Toxic Heavy Metals

scholarly journals Bioremoval of Different Heavy Metals in Industrial Effluent by the Resistant Fungal Strain Aspergillus niger

2021 ◽  
Vol 20 (4) ◽  
Author(s):  
K. J. Naveen Kumar ◽  
J. Prakash
Keyword(s):  
Heavy Metals ◽  
Aspergillus Niger ◽  
Metal Binding ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Industrial Effluent ◽  
Toxic Metal ◽  
Differential Pulse ◽  
Toxic Heavy Metals

Developing countries are increasingly concerned with pollution due to toxic heavy metals in the environment. Unlike most organic pollutants which can be destroyed, toxic metal ions released into the environment often persist indefinitely circulating and eventually accumulating throughout the food chain thus posing a serious threat to mankind. The use of biological materials for heavy metal removal or recovery has gained importance in recent years due to their good performance and low cost. Among the various sources, both live and inactivated biomass of organisms exhibits interesting metal binding capacities. Their complex cell walls contain high content of functional groups like amino, amide, hydroxyl, carboxyl, and phosphate which have been implicated in metals binding. In the present study, Aspergillus niger was used to analyze the metal uptake from an aqueous solution. The determination of Cu+2, Pb+2, Cd+2, Zn+2, Co-2 and Ni+2 in samples was carried out by differential Pulse Anodic Voltammetry (DPASV) and the Voltammograms. Production of oxalic acid was carried out by submerged fermentation. The organism used in the present study has the ideal properties to sequester toxic metals and grow faster.

scholarly journals HEAVY METALS IN THE FOOD CHAIN - CONSEQUENCES OF POLLUTING WATER BODIES

2021 ◽  
Vol 7 (1) ◽  
pp. 07-17
Author(s):  
T V Ramchandra ◽  
N R Narayan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Food Chain ◽  
Lake Water ◽  
Inductively Coupled Plasma ◽  
Industrial Effluent ◽  
Bone Diseases ◽  
Body Parts ◽  
Human Beings ◽  
Toxic Heavy Metals

Purpose of the study: Heavy metals in food (vegetables, etc.) are harmful to humans due to their non-biodegradable nature, long biological half-lives, and their potential to accumulate in different body parts. Prolonged consumption of such heavy metal contaminated vegetables through foodstuffs may lead to chronic accumulation of heavy metals in human beings' kidneys and liver, disrupting numerous biochemical processes, leading to cardiovascular, neural, kidney and bone diseases. Method: The study on heavy metal concentrations in vegetables grown in the command areas of Varthur lake, Bangalore. The collected vegetable samples were analyzed using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) technique to assess the level of heavy metal in acid digested samples. Main Findings: The study has shown a significant accumulation of heavy metals in vegetables that correlated well with its concentrations in soil and lake water. The prolonged irrigation of vegetables using contaminated lake water has led to soil contamination, which ultimately resulted in contamination of vegetables due to the uptake and accumulation of heavy metals in edible portions of vegetables. Application of the Study: Urgent attention is needed to devise and implement appropriate means of regular monitoring of the toxic heavy metals from domestic sewage and industrial effluent and provide proper advice and support for the safe and productive use of wastewater for irrigation purposes to prevent excessive buildup of heavy metals in the food chain.

scholarly journals Effect of Irrigation with Industrial Effluent and Well Water on the Levels of Heavy Metals in Wheat (Case Study of Alborz Industrial Center)

2019 ◽  
Vol 9 (5) ◽  
pp. 484-495 ◽  
Author(s):  
MM Zarrabi ◽  
◽  
S Mafakheri ◽  
A Mahdavi Mazdeh ◽  
Z Jafari Halali ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Industrial Effluent ◽  
Well Water ◽  
Industrial Center

scholarly journals Monitoring and mitigation of toxic heavy metals and arsenic accumulation in food crops: A case study of an urban community garden

Plant Direct ◽  
2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Andrew M. Cooper ◽  
Didra Felix ◽  
Fatima Alcantara ◽  
Ilya Zaslavsky ◽  
Amy Work ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Urban Community ◽  
Community Garden ◽  
Food Crops ◽  
Toxic Heavy Metals ◽  
Arsenic Accumulation ◽  
Heavy Metals And Arsenic

scholarly journals Potential Ecological Risk of Swamps Sediments in Illegal Refineries Sites: A Case Study of Isoko South, Delta State, Nigeria

2020 ◽  
pp. 1-9
Author(s):  
O. R. Akpomrere ◽  
H. Uguru
Keyword(s):  
Heavy Metals ◽  
Ecological Risk ◽  
Contamination Factor ◽  
Potential Ecological Risk ◽  
Toxic Heavy Metals ◽  
Oil Refineries ◽  
Niger Delta Region ◽  
Heavy Metals Toxicity ◽  
High Degree

This study was carried to determine the level of heavy metals toxicity in swampy forest of Isoko South, Delta State, Nigeria. Sediments samples were collected from nine spatial points, within the swampy forest of Enwhe community of Delta State, Nigeria. The study area contained clusters of illegal crude oil refineries, before they were destroyed by the Nigeria military, during the first quarter of 2020. A total area of 1 km2 of the swampy environment was covered in this study. Six toxic heavy metals (Cu, Zn, Cr, Cd, Pb, and Ni) contents, in the sediments were determined in accordance to international approved standards. The results revealed that the activities of the illegal refineries located in the study area, significantly increased the heavy metals toxicity in the sediments.  When compared with the results obtained from a reference point, the concentrations of the heavy metals were significantly higher, across the study area. Within the study area, spatial points B and D sediments contained the highest heavy metals concentrations. In addition, the study revealed that contamination factor of the sediments ranged between moderate and high degree of heavy metals contamination. This portrayed the potential ecological risks of the illegal refineries activities, to the environment of the region. Therefore, if these illegal refineries activities are allowed to continue unabated, they will cause a serious ecological risk to the Niger Delta region ecosystems.

scholarly journals Sediment Contamination Due to Toxic Heavy Metals in Mithi River of Mumbai

2012 ◽  
Vol 2 (3) ◽  
pp. 14-24 ◽  
Author(s):  
Pravin U. Singare ◽  
Ravindra M. Mishra ◽  
Manisha P. Trivedi
Keyword(s):  
Heavy Metals ◽  
Sediment Contamination ◽  
Toxic Heavy Metals

Environmental Risk and Recoverable Potential Evaluation of Heavy Metals in the Sludge from the Industrial Wastewater in China

2012 ◽  
Vol 508 ◽  
pp. 196-199 ◽  
Author(s):  
Jian Feng Bai ◽  
Cheng Long Zhang ◽  
Jing Wei Wang ◽  
Jin Qiu Xu ◽  
Yuan Zhou ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Industrial Wastewater ◽  
Low Cost ◽  
Industrial Effluent ◽  
Inorganic Elements ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Metal Production ◽  
Potential Evaluation ◽  
Steel Industries

During the treatment of wastewater from metal production and processing industries, a huge volume of sludge is generated. Sludge from the industrial effluent is usually abandoned or used in agriculture as fertilizer due to the presence of phosphorus, potassium and other inorganic elements, or landfilled. In our work, metals concentration in the sludge from different industries of multi-area, China, was determined and the recoverable potential was assessed. It indicated that the sludge from electroplating, PCB, leather treatment, metal smelter and stainless steel industries was restricted its use as a fertilizer because that the sludge had too high concentration of toxic heavy metals. Meanwhile, it was seen that Ag, Cu, Co, Ni, Pb, Zn contents in the sludge from some industries had exceeded the minimum standards of industrial smelting and had the value recycled. It is imperative and beneficial to find a low-cost, environmentally friendly recycling technology to recover the metals in sludge from industrial wastewater.

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. 

Assessment of micro and macro nutrients in poultry feeds available in Dhaka city, Bangladesh.

2017 ◽  
Vol 1 ◽  
pp. 264
Author(s):  
Md Didarul Islam ◽  
Ashiqur Rahaman ◽  
Fahmida Jannat
Keyword(s):  
Heavy Metals ◽  
Adverse Effect ◽  
The Other ◽  
Nutrient Level ◽  
Dhaka City ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Low Concentration ◽  
Feed Formulation ◽  
Macro Nutrients

This study was based on to determine the concentration of macro and micro nutrients as well as toxic and nontoxic heavy metals present in the chicken feed available in Dhaka city of Bangladesh. All macro nutrients, if present in the feed at high concentration have some adverse effect, at the same time if this nutrient present in the feed at low concentration this have some adverse effect too. So that this nutrient level should be maintained at a marginal level. On the other side toxic heavy metals if present in the feed at very low concentration those can contaminate the total environment of the ecosystem. In this study six brand samples (starter, grower, finisher and layer) which was collected from different renowned chicken feed formulation industry in Bangladesh. Those samples were prepared for analysis by wet ashing and then metals were determined by Atomic Absorption Spectroscopy. It was found that 27.7 to 68.4, 57.3 to 121.9, 0.21 to 4.1, 0.32 to 2.1, 0.11 to 1.58, 0.28 to 2.11 and 0.28 to 1.78 for zinc, iron, copper, mercury, cadmium, nickel and cobalt respectively. It was found that essential macro and micro nutrients were present in the feed in low concentration on the other side mercury was present in high concentration in the feed samples.

Determination of Traces Heavy Metals from Solid Residues Formed by Combustion of Lignite in Relation to Degree of Accessibility in Soil and Plants

2017 ◽  
Vol 68 (10) ◽  
pp. 2363-2366
Author(s):  
Delia Nica Badea
Keyword(s):  
Heavy Metals ◽  
Power Plant ◽  
Thermal Power ◽  
Reference Value ◽  
Combustion Products ◽  
Toxic Heavy Metals ◽  
Area Of Influence ◽  
Risk Potential

The paper evaluates the presence and content of traces of heavy metals Hg, Pb, Ni, Cd (total forms) from coal and solid combustion products, the degree of transfer and accessibility in the area of influence of a lignite power plant. The content of toxic heavy metals in residues are characterized by RE Meiji [ 1 (Pb and Hg) and REMeij �1 (Ni and Cd) for the filter ash. Pb and Ni content in the soil exceeds normal values, and Pb exceeds and alert value for sensitive soils around the residue deposit (70.20 mg.Kg-1). The degree of accessibility of the metals in plants (TF), reported at the Khan reference value (0.5), indicates a significant bioaccumulation level for the metals: Cd (1.9) and Hg (0.6) inside the deposit; Cd (0.39) at the base of the deposit, Hg (0.8) in the area of the thermal power plant. The trace levels of heavy metals analyzed by GFAAS and CVAAS (Hg), indicates a moderate risk potential for food safety and quality of life in the studied area.

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