scholarly journals Pollution Assessment of Trace Elements in the Soil Planting Chinese Herbaceous Peony in Suzhou, China

2021 ◽  
Vol 20 (1) ◽  
pp. 357-362
Author(s):  
L.H. Sun ◽  
S.B. Feng
Keyword(s):  
Trace Elements ◽  
Pollution Assessment ◽  
Herbaceous Peony

scholarly journals POLLUTION ASSESSMENT AND SOURCE APPROXIMATION OF TRACE ELEMENTS IN THE FARMLAND SOIL NEAR THE TRAFFICWAY

2020 ◽  
Vol 28 (1) ◽  
pp. 20-27
Author(s):  
Linhua Sun
Keyword(s):  
Trace Elements ◽  
Pollution Assessment ◽  
Factor Analyses ◽  
Multivariate Statistical ◽  
Manganese Zinc ◽  
Nickel Copper ◽  
Coefficients Of Variation ◽  
Farmland Soil ◽  
Abundant Element ◽  
Composite Indexes

The traffic related environmental pollution problems have attracted a lot of attention. In this study, contents of eight trace elements along with Fe and Mn in the farmland soil near a trafficway of Suzhou, Anhui province, China have been measured for the pollution assessment and source identification (along with quantification). The results show that iron is the most abundant element, followed by manganese, zinc, chromium, nickel, copper, lead, arsenic, cobalt and cadmium. They have coefficients of variation range between 0.028 and 0.281, indicating that some of them might have multi-sources. The pollution indexes (including single pollution, geo-accumulation and the Nemerow composite indexes) indicate that the soil samples are slightly polluted. Multivariate statistical analyses (including correlation, cluster and factor analyses) have identified three sources (geogenic, traffic and agriculture related) responsible for the elemental concentrations in the soils. Moreover, the EPA Unmix model have calculated their mean contributions to be 33.4%, 33.2% and 33.3%, respectively.

scholarly journals Pollution Assessment of Trace Elements in Agricultural Soils around Copper Mining Area

2018 ◽  
Vol 10 (12) ◽  
pp. 4533 ◽  
Author(s):  
Xianfeng Cheng ◽  
Jarmila Drozdova ◽  
Tomas Danek ◽  
Qianrui Huang ◽  
Wufu Qi ◽  
...  
Keyword(s):  
Trace Elements ◽  
Agricultural Soils ◽  
Pollution Assessment ◽  
Mining Area ◽  
Potential Ecological Risk ◽  
Environmental Risks ◽  
National Standards ◽  
Copper Mining ◽  
Sources Of Pollution ◽  
Mining And Smelting Activities

Agricultural soils from Dongchuan copper mining area were sampled and analyzed to determine the concentrations of selected trace elements, namely As, Cd, Cr, Cu, Hg, Ni, Pb and Zn. The main objectives of this study were: (1) To determine the levels of trace elements and their spatial distribution in soils; (2) to evaluate the potential ecological risk; and (3) to identify the main sources of risk element pollution. The environmental risks were assessed using five different contamination and pollution indexes. Descriptive and exploratory statistical analyses were performed to identify the relations among the trace elements in soils and possible sources of pollution. Although the values of As, Cu and Zn in the soils were significantly higher than Yunnan background values and exceeded the limits of the Chinese national standards in several sampling points, the most serious threat for the ecosystem and human health was represented by Cd. The main sources of Cu and As were identified mining activities, airborne particulates from smelters and the weathering of tailings, and partly also agricultural fertilizers. The major source of Cd was agricultural fertilizers and partly sources associated with mining and smelting activities.

Distribution and pollution assessment of trace elements in marine sediments in the Quintero Bay (Chile)

2015 ◽  
Vol 99 (1-2) ◽  
pp. 256-263 ◽  
Author(s):  
Sonnia Parra ◽  
Manuel A. Bravo ◽  
Waldo Quiroz ◽  
Xavier Querol ◽  
Carolina Paipa
Keyword(s):  
Trace Elements ◽  
Marine Sediments ◽  
Pollution Assessment

Contamination and health risk assessment of trace elements in PM10 from mining and smelting operations in the Bor Basin, Serbia

2020 ◽  
Vol 36 (3) ◽  
pp. 135-145
Author(s):  
Sanja Mrazovac Kurilić ◽  
Zvonimir Božilović ◽  
Rade Milošević
Keyword(s):  
Trace Elements ◽  
Spatial Distribution ◽  
Health Risk ◽  
Health Risks ◽  
Hazard Index ◽  
Pollution Assessment ◽  
Anthropogenic Sources ◽  
Human Health Risks ◽  
Geographical Position ◽  
Mining And Smelting

The aim of this research was to determine concentration, spatial distribution and human health risks of four trace elements (arsenic (As), cadmium (Cd), lead (Pb) and nickel (Ni)) in particulate matter PM10 in the mining and smelting basin, Bor, in Serbia. Based on the results, it was concluded that the air in the Bor Basin does not contain significant trace element concentrations despite mining and smelting operations. The spatial distribution pattern of the analysed trace elements was consistent with the geographical position of the mining and smelting area and most densely populated part of the settlement (households and traffic), and consistent with the prevailing winds in the area. The pollution assessment indicated that trace elements As, Cd, Ni and Pb in the air come from other anthropogenic sources such as industry, heating and traffic. Calculated non-carcinogenic health risk assessments showed that ingestion was the primary exposure route for the analysed trace elements. Pb and As were the most important non-carcinogenic risks for children and adults. The hazard index calculated for children indicated that theysuffered greater health risks compared with adults. The non-carcinogenic and carcinogenic risks from trace elements, As, Cd and Ni, in children and adults in the mining and smelting area in Bor were found to be within acceptable ranges.

Microanalytical Identification of a New Zr-Nb-Fe Phase

1990 ◽  
Vol 48 (2) ◽  
pp. 132-133
Author(s):  
O.T. Woo ◽  
G.J.C. Carpenter
Keyword(s):  
Trace Elements ◽  
Cold Rolling ◽  
Proportionality Factor ◽  
Tube Material ◽  
X Ray ◽  
Metal Foils ◽  
Arc Melting ◽  
Intermetallic Particles ◽  
Intermetallic Precipitates ◽  
Cold Worked

To study the influence of trace elements on the corrosion and hydrogen ingress in Zr-2.5 Nb pressure tube material, buttons of this alloy containing up to 0.83 at% Fe were made by arc-melting. The buttons were then annealed at 973 K for three days, furnace cooled, followed by ≈80% cold-rolling. The microstructure of cold-worked Zr-2.5 at% Nb-0.83 at% Fe (Fig. 1) contained both β-Zr and intermetallic precipitates in the α-Zr grains. The particles were 0.1 to 0.7 μm in size, with shapes ranging from spherical to ellipsoidal and often contained faults. β-Zr appeared either roughly spherical or as irregular elongated patches, often extending to several micrometres.The composition of the intermetallic particles seen in Fig. 1 was determined using Van Cappellen’s extrapolation technique for energy dispersive X-ray analysis of thin metal foils. The method was employed to avoid corrections for absorption and fluorescence via the Cliff-Lorimer equation: CA/CB = kAB · IA/IB, where CA and CB are the concentrations by weight of the elements A and B, and IA and IB are the X-ray intensities; kAB is a proportionality factor.

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

Trace Elements and Iron in Human Metabolism

1979 ◽  
Vol 7 (6) ◽  
pp. 1330-1331
Author(s):  
E. D. WILLS
Keyword(s):  
Trace Elements ◽  
Human Metabolism
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