scholarly journals Heavy metals concentration in “etak” tissue at different processing stages.

2019 ◽  
Vol 7 (1) ◽  
pp. 36-39
Author(s):  
Dee Koh Han ◽  
Faizuan Abdullah ◽  
Idanne Adilla Ibrahim ◽  
Nurul Inani Rozaki ◽  
Siti Nor Aini Md Nasir ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Corbicula Fluminea ◽  
Atomic Absorption Spectrometer ◽  
Acid Digestion ◽  
Sample Collection ◽  
Freshwater Bivalve ◽  
Metal Determination ◽  
Permissible Limits ◽  
Local Newspapers ◽  
Heavy Metal Determination

Corbicula fluminea, known as “etak” in Kelantan, Malaysia is a freshwater bivalve. This clam is widely consumed as traditional snack by the locals. However, lately there are numerous reports in local newspapers that claim “etak” to cause health effects due to eating contaminated “etak”. Hence, this study aims to determine the heavy metals concentration in fresh, smoked and exposed “etak” sold at the stall as a baseline study in order to develop a method for removing the heavy metals content in its tissues. This study involves sample collection in the stalls around Kelantan, sample preparations via acid digestion and heavy metal determination using Perkin Elmer PinAAcle 900F Atomic Absorption Spectrometer. The results showed the heavy metals (Cr, Zn, Mn and Cu) concentrations (µg/g) in all “etak” tissue were at different level for fresh (Cr: 1.02±0.35ppm, Zn: 74.57±2.76ppm, Mn: 40.22±9.96ppm and Cu: 15.27±1.41ppm), smoked (Cr: 0.42±0.02ppm, Zn: 54.62±17.83ppm, Mn: 50.13±2.31ppm and Cu: 20.94±8.81ppm) and exposed (Cr: 0.53±0.08ppm, Zn: 63.07±8.44ppm, Mn: 50.41±6.92ppm and Cu: 12.80±0.40ppm) samples. The results obtained were compared with the permissible limits set by Malaysian Food Regulations 1985 (Cu: 30.0ppm and Zn: 100.0ppm), FAO/WHO 1984 (Mn: 5.4ppm) and IAEA – 407 (Cr: 0.75ppm). For fresh “etak”, Zn and Cu concentration were below the standards, while Mn and Cr were exceeded the permissible limits. For smoked “etak” and exposed “etak” at stall, all heavy metals concentration were within the permissible limits, except Mn contents. This study successfully determine the baseline concentration of the heavy metals in “etak”.

Determination of Heavy Metals in Moringa oleifera Capsules by ICP-MS

2014 ◽  
Vol 1060 ◽  
pp. 231-234
Author(s):  
Chutima Limmatvapirat ◽  
Sontaya Limmatvapirat ◽  
Juree Charoenteeraboon ◽  
Thawatchai Phaechamud
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Moringa Oleifera ◽  
Acid Digestion ◽  
Inductively Coupled ◽  
Permissible Limits ◽  
Normal Ranges ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

Moringa oleifera Lam. leaf capsules collected from markets in Nakhon Pathom, Thailand were determined for 11 heavy metals (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn) by inductively coupled plasma-mass spectrometry (ICP-MS) using acid digestion for sample preparation. The concentrations of Al, As, Cr, Cu and Hg in all samples of M. oleifera capsules were found within permissible limits and normal ranges. In contrast, Fe, and Zn concentrations in all samples were higher than permissible limits. Furthermore, the concentrations of Cd, Mn, Ni, and Pb in some samples were higher than permissible limits and normal ranges. The presence of elevated levels of Cd, Fe, Mn, Ni, Pb, and Zn in M. oleifera capsules is a serious matter of concern. Therefore, it is important that doctors and consumers are aware of this matter especially during the routine taking of M. oleifera capsules.

scholarly journals HEAVY METALS TOXICITY:

2017 ◽  
Vol 24 (09) ◽  
pp. 1431-1436
Author(s):  
Kashif Ur Rehman Khalil ◽  
Naheed Mehsood ◽  
Muhammad Saleh Faisal ◽  
Baber Awan
Keyword(s):  
Heavy Metals ◽  
Analytical Study ◽  
Sampling Technique ◽  
Atomic Absorption Spectrometer ◽  
Acid Digestion ◽  
Cross Sectional ◽  
Khyber Pakhtunkhwa ◽  
Medical College ◽  
Wet Digestion ◽  
Digestion Technique

Objectives: To estimate the concentration of heavy metals (Lead, cadmium,Chromium and copper) in branded and non-branded (local) snacks in the markets of Peshawar,Khyber Pakhtunkhwa, Pakistan. Study Design: Cross-sectional analytical study. Setting:District Peshawar, Khyber Pakhtunkhwa, Pakistan. Period: 6 months; from December 2016 toApril 2017. Materials and Methods: A total of 96 different samples of potato and corn snackswere selected from four towns of district Peshawar by convenient sampling technique. Allsamples were subjected to wet digestion using acid digestion technique and Lead, Cadmium,Chromium and copper were quantitatively detected, using Atomic Absorption spectrometer inthe Public Health laboratory Khyber Medical College Peshawar. Results: Mean concentrationof Lead, cadmium, chromium and copper in potato based branded snacks were in the rangeof 0.085-0.423mg/kg, 0.003-0.046 mg/kg, 2.186-2.328 mg/kg and 0.008-0.108 mg/kg andconcentration of heavy metals in corn based branded snacks were in range of 0.240-0.351mg/kg, 0.007-0.012mg/kg, 2.254-2.179 mg/kg, 0.030-0.082 mg/kg respectively. While meanconcentration of Lead, cadmium, chromium and copper in non-branded (local) snacks were0.057-0.324 mg/kg, 0.005-0.012 mg/kg, 2.137-2.247 mg/kg and 0.018-0.06 mg/kg respectively.Conclusion: Lead and chromium were exceeding in majority samples of branded and localsnacks. Particular concern was of chromium, which was exceeding far beyond the allowedlimits in all samples.

scholarly journals Assessment of Selected Heavy Metals Concentration In Different Brands of Fish Feed Available In Bangladesh

2018 ◽  
Vol 42 (2) ◽  
pp. 207-210
Author(s):  
Biraj Saha ◽  
Md Abdul Mottalib ◽  
ANM Al Razee
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Atomic Absorption ◽  
Dry Weight ◽  
Fish Feed ◽  
Atomic Absorption Spectrometer ◽  
Heavy Metal Concentrations ◽  
Permissible Limits ◽  
Academy Of Sciences ◽  
Absorption Spectrometer

The paper reports the findings on the concentrations of  heavy metals in ten different fish feed by using Atomic Absorption Spectrometer. The level of heavy metal concentrations (dry weight) in the fish feed ranged from 1.17 to 2.0, 2.33 to 4.67, 5.17 to 21.67, 106.67 to 363.3, 3.5 to 7.16, 3.83 to 21.2, 56.7 to 141.6 and 2.1 to 16.49 mg/kg of Cd, Co, Cu, Fe, Ni, Pb, Zn and Cr respectively. The concentrations of Fe, Pb, Co, Cr in different brands of fish feed exceeded the maximum permissible limits recommended by FAO/WHO and EU whereas the concentrations of Cd, Cu, Ni, Zn were within acceptable limits. Journal of Bangladesh Academy of Sciences, Vol. 42, No. 2, 207-210, 2018

scholarly journals Analysis of Spatial Variability of River Bottom Sediment Pollution with Heavy Metals and Assessment of Potential Ecological Hazard for the Warta River, Poland

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 327
Author(s):  
Joanna Jaskuła ◽  
Mariusz Sojka ◽  
Michał Fiedler ◽  
Rafał Wróżyński
Keyword(s):  
Heavy Metals ◽  
Bottom Sediment ◽  
Bottom Sediments ◽  
Risk Index ◽  
Point Sources ◽  
Sediment Pollution ◽  
Sample Collection ◽  
Effect Concentration ◽  
Ecological Hazard ◽  
River Bottom

Pollution of river bottom sediments with heavy metals (HMs) has emerged as a main environmental issue related to intensive anthropopressure on the water environment. In this context, the risk of harmful effects of the HMs presence in the bottom sediments of the Warta River, the third longest river in Poland, has been assessed. The concentrations of Cr, Ni, Cu, Zn, Cd, and Pb in the river bottom sediments collected at 24 sample collection stations along the whole river length have been measured and analyzed. Moreover, in the GIS environment, a method predicting variation of HMs concentrations along the whole river length, not at particular sites, has been proposed. Analysis of the Warta River bottom sediment pollution with heavy metals in terms of the indices: the Geoaccumulation Index (Igeo), Enrichment Factor (EF), Pollution Load Index (PLI), and Metal Pollution Index (MPI), has proved that, in 2016, the pollution was heavier than in 2017. Assessment of the potential toxic effects of HMs accumulated in bottom sediments, made on the basis of Threshold Effect Concentration (TEC), Midpoint Effect Concentration (MEC), and Probable Effect Concentration (PEC) values, and the Toxic Risk Index (TRI), has shown that the ecological hazard in 2017 was much lower. Cluster analysis revealed two main groups of sample collection stations at which bottom sediments showed similar chemical properties. Changes in classification of particular sample collection stations into the two groups analyzed over a period of two subsequent years indicated that the main impact on the concentrations of HMs could have their point sources in urbanized areas and river fluvial process.

Evaluation of heavy metals content in the canned/packed fruit juices from local and imported origin in Lahore, Pakistan

2021 ◽  
Author(s):  
Nazeefa Fatima ◽  
Munazza Khan ◽  
Muhammad Shuaib Kabeer
Keyword(s):  
Heavy Metals ◽  
Atomic Absorption ◽  
Fruit Juices ◽  
Human Consumption ◽  
Acid Digestion ◽  
Digestion Method ◽  
Mean Values ◽  
Nutritive Values ◽  
The Mean ◽  
Mean Concentration

This study was conducted to determine the mean concentration of heavy metals such as lead (Pb), copper (Cu), zinc (Zn), chromium (Cr), manganese (Mn), nickel (Ni), selenium (Se), magnesium (Mg), and iron (Fe) in canned/packed fruits juices, collected from various stores in Lahore in a period of three months. These juices were categorized into four groups; local packed and canned and also imported packed and canned products. Every group consisted of ten samples. By using the di-acid digestion method, the collected samples were digested and analyzed under Atomic Absorption Spectrophotometer (AAS). The results indicated that the mean values of 7 out of 9 tested heavy metals including Pb, Mg, Ni, Fe, Cr, Se and Mn were above permissible limits (set by WHO) in all four understudy groups. Therefore, it was concluded that commercially available fruit juices are not all safe according to their heavy metals content for the human consumption despite their nutritive values.

Study of ceramic membrane behavior for okadaic acid and heavy-metal determination in filtered seawater

2019 ◽  
Vol 232 ◽  
pp. 564-573
Author(s):  
Lydia Pérez ◽  
Isabel Escudero ◽  
Ana G. Cabado ◽  
B. Molinero-Abad ◽  
M. Julia Arcos-Martínez
Keyword(s):  
Heavy Metal ◽  
Okadaic Acid ◽  
Ceramic Membrane ◽  
Membrane Behavior ◽  
Metal Determination ◽  
Heavy Metal Determination

scholarly journals Investigation of surface water quality of the Buriganga river in Bangladesh: Laboratory and spatial analysis approaches

2019 ◽  
Vol 28 (2) ◽  
pp. 147-158
Author(s):  
Mohammad Saiful Islam ◽  
Romana Afroz ◽  
Md Bodruddoza Mia
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Quality Standard ◽  
Quality Parameters ◽  
Average Concentration ◽  
Water Quality Parameters ◽  
Economic Implications ◽  
Permissible Limits ◽  
Buriganga River

This work has been conducted to evaluate the water quality of the Buriganga river. In situ water quality parameters and water samples were collected from 10 locations in January 2016 and analyzed later in laboratory for water quality parameters such as pH, Eh, EC, TDS, cations (Na+, K+, Ca2+, Mg2, As3+), anions (Cl-, HCO3-, NO2-, NO3-, SO42-, F-, Br-, PO43-), heavy metals (Cr2+, Pb2+, Zn2+, Cd+2, Fe2+, Mn2+) to see whether or not the level of these parameters are within the permissible limits. The average values of pH, Eh, EC and temperature were 7.31, –214.9 mV, 928.9 μs/cm and 21.4°C, respectively; the average concentration of Na+, K+, Ca2+, Mg2+, and As3+ were 109.62, 13.38, 46.78, 13.98 and 0.018 mg/l, respectively, while the concentrations of Cl-,HCO3-, PO43-, SO42-, NO3-, NO2-, F and Br -were 79, 331.06, 2.22, 84.32, 0.0254, 0.058, 0.224 and 0.073 mg/l, respectively; and the concentration of heavy metals Pb2+, Zn2+, Fe2+ and Mn2+were 0.28, 0.053, 0.17 and 0.23 mg/l, respectively. The study indicates that most of the parameters are within the permissible limits set by Bangladesh water quality standard. The concentrations of K+, Mn2+, and Pb2+ were beyond the permissible limits meaning that that the water of Buriganga is not safe for drinking. The people living beside Buriganga river should be more cautious about using the polluted/contaminated river water. The concerned authorities should take urgent necessary steps to improve the degraded water quality of the river considering the ecological, environmental and economic implications associated with it. Dhaka Univ. J. Biol. Sci. 28(2): 147-158, 2019 (July)

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