scholarly journals SPECTROSCOPIC DETERMINATION OF SOME HEAVY METALS AND THEIR EFFECT ON THE QUALITY OF GROUNDWATER.

2017 ◽  
Vol 5 (4) ◽  
pp. 1276-1289
Author(s):  
R.M.Abd Elaal ◽  
◽  
W.H. Hegazy ◽  
I.A. Ibrahem ◽  
M.A. Esmail ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Spectroscopic Determination

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.

scholarly journals Bees: bioindicators of the environment

2020 ◽  
Author(s):  
Iryna Kovalchuk
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Raw Materials ◽  
Literature Information ◽  
Heavy Metals Accumulation ◽  
Systems Research ◽  
Metals Accumulation ◽  
Methodological Approaches

It is well-known that melliferous bees are the most sensitive indicators of ecologic conditions of natural environment. Researches in recent years show that bees and bee products can accumulate selectively some heavy metals, radioactive substances, pesticides and other polluters. Scales of heavy metals accumulation on the territory of Ukraine, as toxins of technologic origin unfortunately increase. Environmental pollution by heavy metals leads to their accumulation in plant and animal raw materials and production, consequently their quality decreases. It was proved that apiary accommodation in heavy metal polluted territories leads to their accumulation in pollen, honey bee-comb and wax. But the questions concerning study of peculiarities of sources, ways of pollution and heavy metals content in bee products are not enough lightened, and that was the purpose of our work. Generalized we present in literature information and results of our researches about the use of bees and bee products in quality of bioindicator contamination of environment by heavy metals. Dependence of content of heavy metals is set in the organism of bees in relation intensity of greening to contamination of environment. It is marked on the necessity of lead through of systems research in relation to determination of content of heavy metals in fabrics of bees and bee products with the purpose of search of new methodological approaches for authentication these toxicant of objective environment of contamination and him apimonitoring. Methodological elements of the researches of regularities of heavy metals and lipids content in the tissues of different anatomic sections of the organism and bee products were elaborated.

Determination of Contaminated Heavy Metals in Lacquer Thinner

2018 ◽  
Vol 879 ◽  
pp. 144-148
Author(s):  
Woravith Chansuvarn ◽  
Kunawoot Jainae
Keyword(s):  
Heavy Metals ◽  
Trace Metals ◽  
Absorption Spectrometry ◽  
High Concentration ◽  
X Ray ◽  
Wet Digestion ◽  
Clear Solution ◽  
Cu And Zn

The aim of this work needed to discover the problem of lacquer thinner products claimed with dissatisfying the quality of coating and color appearance. The trace metals produced cans was focused on release to solvents. The contaminated trace metals including Fe, Sn, Cu, and Zn in lacquer thinner were also determined by atomic absorption spectrometry (AAS). The lacquer thinner samples were simply carbonized to be ashes by furnace muffle at 550°C for 8 hours. The carbonized ashes were then also digested by conventional wet digestion with concentrated nitric acid until a clear solution was archived. Twenty samples of lacquer thinner were achieved from the paint manufacturer. The content of Fe, Sn, Cu, and Zn was found in the range of 0.0631-77.190 mg/kg, ND-12.613 mg/kg, ND-1.4679 mg/kg, and ND-0.4028 mg/kg, respectively. The result of high concentration of Fe related to the appearance of lacquer thinner color. The evidence of released heavy metals in the ashes of lacquer thinner samples was evaluated by X-ray fluorescence technique. The result of this work was concluded that the contaminated trace metals in the suspected lacquer thinner samples were leached from the metallic package.

scholarly journals X-ray fluorescence spectroscopic determination of heavy metals and trace elements in aerial parts of Origanum sipyleum L from Turkey

2016 ◽  
Vol 15 (5) ◽  
pp. 1013 ◽  
Author(s):  
Cenk Durmuşkahya ◽  
Hakan Alp ◽  
Zehra Sinem Hortooğlu ◽  
Ümit Toktas ◽  
Hüsniye Kayalar
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Spectroscopic Determination ◽  
X Ray ◽  
Aerial Parts ◽  
Metals And Trace Elements

scholarly journals Determination of Heavy Metals and Pesticides in Ginseng Products

2001 ◽  
Vol 84 (3) ◽  
pp. 936-939 ◽  
Author(s):  
Ikhlas A Khan ◽  
James Allgood ◽  
Larry A Walker ◽  
Ehab A Abourashed ◽  
Daniel Schlenk ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Total Concentration ◽  
Herbal Medicines ◽  
Over The Counter ◽  
Contaminant Exposure ◽  
Cadmium Lead ◽  
Contaminant Accumulation ◽  
Persistent Pesticides

Abstract Medicinal plants may carry residuals of environmentally persistent pesticides or assimilate heavy metals in varying degrees. Several factors may influence contaminant accumulation, including species, level and duration of contaminant exposure, and topography. As part of a program for assessment of the quality of herbal medicines, we have analyzed 21 over-the-counter ginseng (Panax ginseng) products in various dosage forms. Chromium, mercury, and arsenic were undetectable above their limits of detection in both liquid and solid samples; while cadmium, lead, and nickel were present in the majority of samples. The chlorinated pesticide levels varied widely. In most samples, the total concentration of pesticides was below 100 ppb; while in 5 samples the total concentration exceeded 100 ppb.

Heavy metal levels in cassava flour sold in Okura, Ejule and Ojapata of kogi state, Nigeria

2021 ◽  
Vol 19 (3) ◽  
pp. 45-54
Author(s):  
Olubiyo Gloria Taiye ◽  
Yakubu Anita Ohunene ◽  
Olubiyo Comfort Kehinde
Keyword(s):  
Heavy Metals ◽  
Human Exposure ◽  
Cassava Flour ◽  
Low Concentrations ◽  
Zn Concentration ◽  
Guideline Values ◽  
Metal Levels ◽  
Iron And Zinc

Cassava (Manihot esculenta) is a major source of carbohydrate and a staple food cultivated in Nigeria especially in Kogi  State. Determination of heavy metals in cassava flour from major markets:(Okura ,Ejule and Ojapata) in Kogi East was done to ascertain the quality of cassava flour and its human exposure path.Lead, cadmium, iron and zinc contents were determined using Atomic Absorption Spectrophotometer (AAS).The results were analysed using Analysis of Variance (ANOVA), Duncan Multiple Range Test (DMRT) and  Independent Sample t-test. Zn concentration in Ejule (Control) was as low as 0.002±0.000a . Pd,Cd,Fe, and Zn screened were far below the WHO guideline values or permissible limit of metal in food.This implies that the metal toxicants present in the cassava flour is in such low concentrations that render the food non-toxic and edible. Keywords: Heavy metals; pollution; cassava flour; human exposure.

scholarly journals Analysis of Heavy Metals Distribution in the River Town of Hamasaki's Rod Padangsidimpuan

2018 ◽  
Vol 19 (2) ◽  
pp. 50-56 ◽  
Author(s):  
Fatma Suryani Harahap ◽  
Laila Tussifah Lubis
Keyword(s):  
Heavy Metals ◽  
River Flow ◽  
Average Concentration ◽  
Sampling Location ◽  
Before And After ◽  
Open Dumping ◽  
Quality Threshold ◽  
Leachate Water

Systems of waste management in Padangsidimpuan City is an open dumping system. The location of the Padangsidimpuan City landfill is carried out at the Batu Bola TPA located in Batu Bola Village which is 120 meters from the Batang Ayumi river flow. Continuous landfill in the landfill produces pollutants in the form of leachate. Leachate contains organic materials and heavy metals. Heavy metals that are often found in leachate water are Iron (Fe) cadmium (Cd) and Zinc (Zn). This research aims to know the quality of the water of the Batang Ayumi river in terms of the content of heavy metals Cd, Zn, and Fe. This research uses descriptive exploratory method by conducting a survey first. The determination of the sampling location using purposive sampling method at four stations specified. River water sampling is carried out twice, before and after rain. This research uses an Atomic Absorption Spectrophotometer tool. The data obtained were analyzed by comparing research data with water quality standards based on PP. No. 82 of 2001 to look at the conditions of the heavy metal pollution of Cd, Zn and Fe. The results of this study showed that the average concentration of the metal content Cd, Zn and Fe werw below the specified quality threshold, namely the concentration of metal Cd of all stations is 0.0009 mg/l, a concentration of metal Fe is 0.03 mg/l, and concentration of Zn metal is 0.0002 mg/l.

scholarly journals Determination of the quality of canned vegetable snacks with various cereals

2021 ◽  
pp. 35-39
Author(s):  
L. K. Sengirbekova ◽  
L. S. Syzdykova
Keyword(s):  
Heavy Metals ◽  
Quality Assessment ◽  
Canned Food ◽  
Minced Meat

This article presents the canned vegetable snack recipes with various cereals and the results of their quality assessment. During the study, in order to expand the range of canned vegetable snacks, rice in the composition of vegetable minced meat was replaced with buckwheat and millet grits, in the ratio of 90g, 100g, 110g. The article reflects the new recipes of canned vegetable snacks prepared with the addition of millet and buckwheat, as well as studies of the content of heavy metals in the developed types of canned food, which showed their compliance with the standards of GOST 30178-96, GOST 26935-86.

Influence of production progress on the heavy metal content in flax fibers

2009 ◽  
Vol 63 (5) ◽  
Author(s):  
Małgorzata Szynkowska ◽  
Edward Rybicki ◽  
Ewa Leśniewska ◽  
Aleksandra Pawlaczyk ◽  
Tadeusz Paryjczak ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Natural Fiber ◽  
Inductively Coupled ◽  
Flax Fibers ◽  
Before And After ◽  
Plasma Mass Spectrometry ◽  
Fiber Manufacturing

AbstractThe aim of this work was to determine the content of selected heavy metals in flax materials depending on the stage of fiber manufacturing. Non-treated natural fiber composition was compared with that of fibers processed. Changes in the composition of yarn before and after the following scutching, hackling, washing, and bleaching were also investigated. Analysis of heavy metals was performed applying inductively coupled plasma mass spectrometry. Flax material was mineralized in closed Teflon vials with a mixture of concentrated nitric acid which were then placed in a microwave oven system. Analytical quality of the obtained results was checked by the determination of elements in the Certificate Reference Materials of IAEA-V-10. The acquired results proved that the content of metals in flax clearly varies depending on the treatment process applied (bleaching, washing, coloration). Significant differences were also connected with the dye used.

scholarly journals Determination of Heavy Metals in Locally Available Chocolates in Lahore Region

2021 ◽  
Vol 9 (6) ◽  
pp. 1144-1153
Author(s):  
Muhammad Amjad ◽  
Shabbir Hussain ◽  
Zia Ur Rehman Baloch ◽  
Aoun Raza
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Toxicity ◽  
The Body ◽  
Toxic Heavy Metals ◽  
Allowable Limit ◽  
Chronic Effects

Heavy metal toxicity can either be acute or chronic effects. Long-term exposure of the body to heavy metal can progressively lead to muscular, physical and neurological degenerative process. In this research, a total of 30 representative chocolate samples were collected from local shops and markets in Lahore. All the samples were analysed to assess the levels of Lead (Pb), Nickel (Ni), Chromium (Cr) and Cadmium (Cd) by using Atomic Absorption Spectrophotometer in Pakistan Council of Scientific and Industrial Research (PCSIR), Lahore. It was observed that the majority of chocolate samples contain heavy metals levels higher than the permissible limits as recommended by Punjab Food Rules (PFR) 2011. The levels of Pb ranged between 0.375 and 3.4 mg/kg with 90% samples having concentrations exceeding PFR allowable limit (0.5 mg/kg). Whereas, Ni concentrations varied from 0.005 to 0.28 mg/kg and 80% samples were above the PFR limit (0.025 mg/kg). Further, Cr levels analysed between 0.005 to 0.28 mg/kg and 53% samples had Cr concentrations higher than PFR limit (0.02 mg/kg). Similarly, Cd levels were observed between 0.50-3.25 mg/kg with 53% samples having Cd concentrations exceeding the PFR limit (1.0 mg/kg). Investigation indicates that the quality of available chocolates is not recommendable for eating because of the higher concentrations of toxic heavy metals.

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