Heavy metal concentration in selected soils and sediments of Livingston Island, Deception Island, King George Island, James Ross Island (Antarctica)

2017 ◽  
Vol 7 (1) ◽  
pp. 18-33
Author(s):  
Vítězslav Vlček ◽  
David Juřička ◽  
Jitka Míková
Keyword(s):  
Heavy Metal ◽  
Metal Concentration ◽  
Inductively Coupled Plasma ◽  
Heavy Metal Concentration ◽  
King George Island ◽  
Deception Island ◽  
Fine Earth ◽  
Livingston Island ◽  
Two Samples ◽  
James Ross Island

This paper evaluated the heavy metal concentration in fine earth and skeleton fraction of the Antarctic soil and sediments in the Admiralty Bay (King George Island); Livingston Island; Whaler´s Bay (Deception Island); James Ross Island and the Trinity peninsula (Antarctica). Total concentrations of eight elements (arsenic, chromium, copper, nickel, lead, strontium, vanadium, and zinc) were determined in sixteen sediments/soils samples and skeleton fraction. For the analyses, eight samples were taken from James Ross Island, four samples from Deception Island, two samples from Trinity peninsula, one sample from Livingston Island, and one sample from King George Island. The contents the elements were determined by inductively coupled plasma mass spectrometry (ICP-MS). Most affected by human activity was the sample collected near permanent station General Bernardo O'Higgins Riquelme - Chile on Trinity peninsula. On this site, the highest concentration of copper in fine-earth (201 ppm), zinc in skeleton (163 ppm) and fine-earth (771 ppm) and strontium in skeleton (733 ppm) and fine-earth (1297 ppm) were found. This location was also exceptional by the residues of penguins’ eggs shells and excrements. Samples of skeleton had significantly higher maximum values of analyzed elements compare to the available literature data. Results from all sampled localities are summarized in the text.

scholarly journals Heavy metal concentration in fish tissues inhabiting waters of “Buško Blato” reservoar (Bosnia and Herzegovina)

2008 ◽  
Vol 145 (1-3) ◽  
pp. 475-475 ◽  
Author(s):  
Elizabeta Has-Schön ◽  
Ivan Bogut ◽  
Gordana Kralik ◽  
Stjepan Bogut ◽  
Janja Horvatić ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Concentration ◽  
Bosnia And Herzegovina ◽  
Heavy Metal Concentration ◽  
Fish Tissues

Remediation-related monitoring of heavy metal concentration of contaminated Technosol using hyperspectral measurements

2021 ◽  
Author(s):  
Friederike Kaestner ◽  
Magdalena Sut-Lohmann ◽  
Thomas Raab ◽  
Hannes Feilhauer ◽  
Sabine Chabrillat
Keyword(s):  
Heavy Metal ◽  
Random Forest ◽  
Metal Concentration ◽  
Strong Dependence ◽  
Scatter Correction ◽  
Heavy Metal Concentration ◽  
Standard Normal Variate ◽  
Multiplicative Scatter Correction ◽  
Second Derivatives ◽  
Standard Normal

<p>Across Europe there are 2.5 million potentially contaminated sites, approximately one third have already been identified and around 15% have been sanitized. Phytoremediation is a well-established technique to tackle this problem and to rehabilitate soil. However, remediation methods, such as biological treatments with microorganisms or phytoremediation with trees, are still relatively time consuming. A fast monitoring of changes in heavy metal content over time in contaminated soils with hyperspectral spectroscopy is one of the first key factors to improve and control existing bioremediation methods.</p><p>At former sewage farms near Ragow (Brandenburg, Germany), 110 soil samples with different contamination levels were taken at a depth between 15-20 cm. These samples were prepared for hyperspectral measurements using the HySpex system under laboratory conditions, combing a VNIR (400-1000 nm) and a SWIR (1000-2500 nm) line-scan detector. Different spectral pre-processing methods, including continuum removal, first and second derivatives, standard normal variate, normalisation and multiplicative scatter correction, with two established estimation models such as Partial Least Squares Regression (PLSR) and Random Forest Regression (RFR), were applied to predict the heavy metal concentration (Ba, Ni, Cr, Cu) of this specific Technosol. The coefficient of determination (R2) shows for Ba and Ni values between 0.50 (RMSE: 9%) and 0.61 (RMSE: 6%) for the PLSR and between 0.84 (RMSE: 0.03%) and 0.91 (RMSE: 0.02%) for the RFR model. The results for Cu and Cr show values between 0.57 (RMSE: 17.9%) and 0.69 (RMSE: 15%) for the PLSR and 0.86 (0.12%) and 0.93 (0.01%) for the RFR model. The pre-processing method, which improve the robustness and performance of both models best, is multiplicative scatter correction followed by the standard normal variate for the first and second derivatives. Random Forest in a first approach seems to deliver better modeling performances. Still, the pronounced differences between PLSR and RFR fits indicate a strong dependence of the results on the respective modelling technique. This effect is subject to further investigation and will be addressed in the upcoming analysis steps.</p>

scholarly journals Comparative Study on Proximate Composition and Heavy Metal Concentration of Molacarplet (Amblypharyngodon mola) and Spotted Snakehead (Channa punctatus) Collected from Pond Water and Open Water

2021 ◽  
Vol 12 (1-2) ◽  
pp. 91-99
Author(s):  
FH Shikha ◽  
MI Hossain ◽  
MA Mansur ◽  
N Nahar
Keyword(s):  
Heavy Metal ◽  
Metal Concentration ◽  
Proximate Composition ◽  
Open Water ◽  
Heavy Metal Concentration ◽  
Pond Water ◽  
Ash Content ◽  
The Other ◽  
Channa Punctatus ◽  
Composition Analysis

A study was conducted on the proximate composition and heavy metal concentration of Amblypharyngodon mola and Channa punctatus collected from pond water and open water in Mymensingh. The proximate composition analysis result showed -protein, lipid, moisture and ash content (%) of pond water A. mola were 20.26±0.63, 6.70±0.17, 66.40±1.51 and 2.55±0.58, respectively and for the fish caught from open water the values were 19.66±0.75, 5.81±0.18, 63.03±0.82 and 2.92±0.15, respectively. On the other hand, protein, lipid, moisture and ash content (%) of pond water C. punctatus found 23.83±1.07, 5.91±0.11, 64.44±1.87 and 3.23±0.11, respectively whereas the values for the fish caught from open water were 22.21±0.66, 5.43±0.19, 62.73±1.65 and 3.67±0.47, respectively. Arsenic (As) concentration of A. mola was higher in open water fishes (0.23±0.05 μg g-1) than the fishes of pond water (0.14±0.03 μg g-1). Cd concentration of pond water C. punctatus was found 0.21±0.04 μg g-1 whereas open water fishes contained 0.28±0.06 μg g-1. Copper (Cu) concentration of pond water and open water A. mola was 0.27±0.07 μg g-1 and 0.32±0.04 μg g-1, respectively. Heavy metal concentration of A. mola and C. punctatus was within permissible limits except Cd. The result revealed that open water fishes had higher concentration of heavy metals in their muscle than the fishes of pond water. Environ. Sci. & Natural Resources, 12(1&2): 91-99, 2019

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