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: In this article, the uptake and translocation pattern of trace metals from two different plant species from a waste dump site in Pretoria, South Africa was investigated and the trace metal contents from different parts of these plants (leaf, stem and root) were determined by the use of ICP-OES.
71 citations
TL;DR: Aerosol particulate matter (PM10 and PM2.5) and trace gases (SO2, NO2, CO and O3) were sampled at five locations in greater Dhaka, Bangladesh, between January and April 2006.
Abstract: Aerosol particulate matter (PM10 and PM2.5) and trace gases (SO2, NO2, CO and O3) were sampled at five locations in greater Dhaka, Bangladesh, between January and April 2006. Particulate matter was collected on micro-fiber filters with a low-volume sampler, and trace gases (SO2, NO2, and O3) were collected with an impinger equipped with PM samplers. Carbon monoxide was determined using the Indicator Tube method. The total average concentrations of SO2, NO2, CO, and O3 were 48.3, 21.0, 166.0 and 28 μg m–3, respectively. The total average concentrations of SO2 and NO2 were much lower than the annual average guideline values of the World Health Organization (WHO). The total average O3 concentration was also much lower than the daily maximum values established by WHO (average of 100 μg m–3 for an 8-h sample). The total average concentrations of five sites were 263, 75.5 and 66.2 μg m–3 for SPM, PM10 and PM2.5, respectively. The mass of PM2.5 is approximately 88% of the PM10 mass, indicating that fossil fuel is the main source of PM in Dhaka. An atomic absorption spectrophotometer was used to determine the heavy metal concentrations in the PM2.5 size fraction. The total average concentrations of As, Cd, Cu, Fe, Pb, and Zn in PM2.5 were 6.3, 13, 94, 433, 204, and 381 ng m–3, respectively. The Pb concentration in Dhaka shows a decreasing tendency, presumably due to the ban on the use of leaded fuel. The overall trace metal concentrations in Dhaka are higher than those in European (e.g., Spain, Norway) and East Asian (e.g., Taiwan) locations, but lower than those measured in Southeast Asian (Kanpur, Delhi, Mumbai, India; Lahore, Pakistan) cities.
71 citations
TL;DR: Calculations of ambient exposures to organochlorines based on residues in crab tissues indicated that dieldrin exceeded national water quality guidelines for protection of aquatic ecosystems at all sampling locations, but exposure to DDT and its metabolites was below the threshold of concern.
71 citations
TL;DR: The role of a mangrove estuary, developing downstream a densely populated megacity (Ho Chi Minh City, Vietnam), on the fate and partitioning of trace metals is characterized.
71 citations
TL;DR: In this paper, sedimentological, trace metal, and molecular evidence for tracking bottom water redox-state conditions during the past 12,500 years in nowadays sulfidic and meromictic Lake Cadagno (Switzerland).
71 citations