Effects of freeze-drying on partitioning patterns of major elements and trace metals in lake sediments

2004 ◽  
Vol 526 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Tomas Hjorth
Keyword(s):  
Trace Metals ◽  
Lake Sediments ◽  
Freeze Drying ◽  
Major Elements

Mineralogy and geochemistry of the Ngaoundaba Crater Lake sediments, northern Cameroon: implications for provenance and trace metals status

2021 ◽  
Author(s):  
Armel Zacharie Ekoa Bessa ◽  
John S. Armstrong-Altrin ◽  
Gentry Calistus Fuh ◽  
Thierry Bineli Betsi ◽  
Tebogo Kelepile ◽  
...  
Keyword(s):  
Trace Metals ◽  
Lake Sediments ◽  
Crater Lake ◽  
Northern Cameroon

Inter-technique comparison of PIXE and XRF for lake sediments

2018 ◽  
Vol 33 (5) ◽  
pp. 883-892 ◽  
Author(s):  
M. El Ouahabi ◽  
G. Chêne ◽  
D. Strivay ◽  
J. Vander Auwera ◽  
A. Hubert-Ferrari
Keyword(s):  
Chemical Analysis ◽  
Lake Sediments ◽  
Major Elements ◽  
Minor Elements ◽  
Validation Procedure ◽  
Technique Comparison

In this paper we describe a validation procedure for the chemical analysis of major elements and some minor elements such as Sr, Cr, Ni, Zn and Zr in heterogeneous geological sediments.

Dissolved trace metals and their relationship to major elements in the Manuherikia River, a pristine subalpine catchment in central Otago, New Zealand

1991 ◽  
Vol 42 (4) ◽  
pp. 409 ◽  
Author(s):  
WW Ahlers ◽  
JP Kim ◽  
KA Hunter
Keyword(s):  
New Zealand ◽  
Trace Metals ◽  
Major Element ◽  
Major Ions ◽  
Major Elements ◽  
Lower Altitude ◽  
Weathering Processes ◽  
Global Standards ◽  
Dissolved Silicon ◽  
Dissolved Trace Metals

The spatial distributions of the dissolved trace metals Cu, Ni, Cd, Zn and Pb and of reactive Hg have been measured in parallel with the major elements Na, K, Mg and Ca and electrical conductivity in three sampling events in the Manuherikia River, New Zealand. The geographical span of the sampling sites ranged from a pristine subalpine upper catchment area through lower altitude sites that are increasingly affected by both natural weathering processes and moderate agricultural and domestic runoff. Major-element concentrations in the upper catchment were at or below the 1% frequency minimum of the spectrum of global river compositions, indicating a highly pristine system. Concen- trations increased steadily downstream to levels similar to world average river water. All trace metals exhibited the same spatial trends as the major ions. Typical upper-catchment concentrations were very low by global standards: Cu (150 ng L-1), Ni (100-150 ng L-1), Cd (8 ng L-I), Zn (150-200 ng L-1), Pb (20-30 ng L-1) and Hg (0.3 ng L-1). Oceanic residence times calculated from the data for Zn (80 000 years) and Cd (230 000 years) for which few reliable estimates have been made, are consistent with observed correlations between the oceanographic distributions of these elements and dissolved silicon or phosphate, respectively.

Induction-Coupled Plasma Determination of Ag, Au, Bi, Cd, Cu, Pb, and Zn in Geologic Materials Using a Selective Extraction Technique—Preliminary Investigation

1979 ◽  
Vol 33 (5) ◽  
pp. 456-460 ◽  
Author(s):  
J. M. Motooka ◽  
E. L. Mosier ◽  
S. J. Sutley ◽  
J. G. Viets
Keyword(s):  
Trace Metals ◽  
Organic Phase ◽  
Inductively Coupled Plasma ◽  
Matrix Effects ◽  
Preliminary Investigation ◽  
Selective Extraction ◽  
Major Elements ◽  
Extraction Technique ◽  
Operating Characteristics ◽  
Geologic Materials

The expanding need for multielement analysis at submicrogram levels in geologic materials has prompted an increased interest in inductively coupled plasma spectrometry. No other analytical procedure simultaneously exhibits, to the same degree, the operating characteristics of excellent precision and accuracy, low limits of detection, dynamic concentration ranges in addition to eliminating or at least reducing, interelemental and matrix effects. The experimental and operating parameters are described for the analyses of trace metals found in the organic phase following a rapid and efficient extraction technique. Direct spectral interferences, matrix and interelemental effects caused by major elements in geologic materials are effectively eliminated and sensitivity is increased by concentrating the trace metals in the organic phase. Aluminum, calcium, iron, potassium, magnesium, manganese, and sodium are among the major elements eliminated; and trace elements (Ag, Au, Bi, Cd, Cu, Pb, and Zn) critical to a mineral evaluation, some of which have insufficient detection limits by plasma analyses, are enhanced to a more precise detection level.

scholarly journals Evaluation of Trace Elemental Levels as Pollution Indicators in an Abandoned Gold Mine Dump in Ekurhuleni Area, South Africa

2021 ◽  
Author(s):  
Godwin Okereafor ◽  
Mamookho Makhatha ◽  
Lukhanyo Mekuto ◽  
Vuyo Mavumengwana
Keyword(s):  
South Africa ◽  
Trace Metals ◽  
Cation Exchange Capacity ◽  
Major Elements ◽  
Exchange Capacity ◽  
Pollution Indices ◽  
Trace Elemental ◽  
Contamination Levels ◽  
High Degree ◽  
Mine Dump

In the Blesbokspruit area of Ekuhurleni, South Africa, previous gold mining activities resulted in many tailings dump sites. 20 representative soil samples were used in describing the distribution of metals. The soils were very strongly acidic ranging from 3.86 to 4.34 with a low cation exchange capacity (CEC). Based on X-ray fluorescence (XRF) analysis, elemental composition of the soils revealed average values of major elements such as Na2O (0.18%), MgO (0.63%), Al2O3 (6.51%), SiO2 (81.83%), P2O5 (0.04%), SO3 (3.40%), K2O (1.98%), CaO (0.45%), TiO2 (0.51%), Cr2O3 (0.17%), MnO (0.04%), Fe2O3 (3.59%), NiO (0.04%), As2O3 (0.02%), with Rb2O and SrO falling below 0.01%. Trace metals (TM) contamination levels in the soils were evaluated using various pollution indices which revealed that over 60% of the soils were between the high degree and the ultra-high degree of contamination classes. The concentration of various trace metals varies from 860.3–862.6 mg/kg for Cr; 324.9–328.4 mg/kg for Al; 200.9–203.4 mg/kg for As; 130.1–136.2 mg/kg for Fe; 121.9–125.8 mg/kg for Pb; 27.3–30.2 mg/kg for Co; 23.8–26.8 mg/kg for Ni; 7.2–9.2 mg/kg for Ti; 7.1–9.2 mg/kg for Cd; 4.0–5.6 mg/kg for Zn and 0.1–0.6 mg/kg for Cu.

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