Topic
Trace metal
About: Trace metal is a research topic. Over the lifetime, 5125 publications have been published within this topic receiving 181046 citations.
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TL;DR: The Al-normalized redox element ratios, and the crude oil contamination ratio, suggested that these events occurred along almost four decades, and that the traces attributed to the Ixtoc1 spill were comparable to background conditions, most likely owing to active natural oil seeps in the area.
54 citations
TL;DR: In this article, water samples from several major source intakes and reticulation end points on Viti Levu, Fiji Islands were analyzed for trace metal (As, Cd, Cr, Cu, Hg, Pb, Zn) content.
Abstract: Drinking water samples from several major source intakes and reticulation end points on Viti Levu, Fiji Islands were analysed for trace metal (As, Cd, Cr, Cu, Hg, Pb, Zn) content. The objective of the study was to determine if metal concentrations were within the World Health Organisation (WHO) guidelines. The concentrations of metals were determined using various atomic absorption techniques (flame, graphite furnace, hydride generation). In th e source waters, concentrations of trace metals were generally very low (<0.5 μg/L) indicating that there are only small inputs of metals from anthropogenic or natural sources. Some of the reticulation end points were found to have higher levels of metals such as Cu. This is likely due to the leaching of metals from metal pipes and fittings within the distribution system. The majority of samples were within WHO guidelines indicating that Viti Levu's water appears safe for drinking from a trace metal perspective. A relatively high value for As was found at one site which was located downstream of a gold mine tailings pond discharge.
54 citations
TL;DR: In this article, the authors measured zinc and cadmium uptake rates in crustaceans and found that zinc and Cadmium do not consistently interact competitively or synergistically at exposure concentrations.
54 citations
TL;DR: Results from litter-soil-plant compartments suggest that soil is this metal's best transfer source, and sludge spread appears to be responsible for the observed bioaccumulation for Cu and Cd after 28days of exposure.
54 citations
01 Sep 2020
TL;DR: In this article, the main objective of the study is to evaluate the hydrogeochemical processes and potential health risk assessment for humans in groundwater of Maputaland coastal aquifer, South Africa.
Abstract: The main objective of the study is to evaluate the hydrogeochemical processes and potential health risk assessment for humans in groundwater of Maputaland coastal aquifer, South Africa. In this study, 53 and 42 groundwater samples were collected from bore wells during 2018 and 2019 and were analysed for major ions, minor ions, nutrients and trace metals. Na–Cl water type was dominant in groundwater followed by Ca–HCO3. Cross plots revealed that ion exchange, reverse ion exchange, silicate weathering, seawater mixing and anthropogenic inputs from agricultural activities govern the groundwater chemistry. GIS methods were adopted to produce spatial distribution maps of major ions through which locations of groundwater contamination and the intensity of hydrogeochemical processes were identified. Mean concentration of trace metals were in the order: Zn > Li > Al > Fe > Mn > Cu > Pb > As > Co > Cd in 2018, Fe > Zn > Mn > Sr > B > Pb > Cu > Co > Cr > Cd > Ag > Al > Ni in 2019. Most of the trace metals were found to be within the WHO standards for drinking water except Cd, Zn, Pb, Mn, Al and Fe. Health risk assessment of trace metals in groundwater via ingestion and dermal absorption pathways were carried out. Hazard Quotients (HQs) and Hazard Index (HI) of all trace metals were below 1, except HQingestion and HI for Co and Pb which were greater than 1 in children. This suggests that these metals pose adverse risks to local people, and children were more sensitive to risks than adults. HI values for adults and children were medium indicating high risk. This is the first baseline study conducted in the study area which identifies the chemical characterization and the potential health risk due to trace metals contamination.
54 citations