Publications by authors named "Wolfgang Christian Pfeiffer"
Article Synopsis
- The study investigates mercury levels in various environmental (like river sediments and fish) and human samples from the lower Madeira River, focusing on data collected 15-20 years after a decline in gold mining activities.
- Despite a drop in mercury emissions due to falling gold prices, the results indicate that mercury concentrations in fish and humans have not significantly changed compared to levels during the mining boom.
- The persistence of high mercury concentrations is attributed to the remobilization from sediments and soil changes, rather than ongoing mining activities.
Bioaccumulation and depuration of Zn and Cd in mangrove oysters (Crassostrea rhizophorae, Guilding, 1828) transplanted to and from a contaminated tropical coastal lagoon.
Mar Environ Res
May 2005
In order to study Zn and Cd accumulation and depuration, a set of oysters, Crassostrea rhizophorae, were transplanted to a metal contaminated coastal lagoon and another one was harvested there and transplanted to a non-polluted site. C. rhizophorae oysters and Perna perna mussels native from both sites were collected in order to monitor variability of metal concentration in resident populations.
View Article and Find Full Text PDFWe evaluated the indoor atmospheric Hg contamination in gold trade shops in two Brazilian cities of the Legal Amazon area using the Spanish moss (Tillandsia usneoides, Bromeliaceae) as a sentinel species. Plants inside plastic cages were exposed to a controlled atmosphere to evaluate the rate of Hg retention over time and then distributed in several stores with different characteristics to enable a relative comparison. Hg concentrations were determined by cold vapor atomic absorption spectrophotometry.
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