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"Assessing the risk of sediment-associated nickel exposure to benthic " by Megan Louise Gillmore

The Southeast Asia and Melanesia (SEAM) region has extensive nickel-rich lateritic regoliths formed from the tropical weathering of ultramafic rocks. As the global demand for nickel continues to rise, these lateritic regoliths are increasingly being exploited for their economic benefit. Mining of these lateritic regoliths contributes to the enrichment of coastal sediments in trace metals, especially nickel. A review of tropical estuarine and marine ecotoxicity data for nickel highlighted the absence of sediment ecotoxicity data, benthic test species and the associated sediment toxicity test methods required to assess the potential impacts of sediment nickel exposure to benthic biota of SEAM. The aim of this thesis was to use a multiple lines of evidence approach to provide a robust evidence-base and risk assessment tools applicable for informing environmental risk assessment of nickel-rich estuarine and marine sediments within the SEAM region.
A whole sediment bioassay based on sub- ....

Southeast Asia , Bioavailability Based Approaches , Ropical Risk Assessment , New Caledonia ,

"Development of a Bioavailability-Based Risk Assessment Framework for N" by Emily R. Garman, Christian E. Schlekat et al.

Abstract
Nickel laterite ore deposits are becoming increasingly important sources of Ni for the global marketplace and are found mainly in tropical and subtropical regions, including Indonesia, the Philippines, Papua New Guinea, Cuba, and New Caledonia. There are few legislatively derived standards or guidelines for the protection of aquatic life for Ni in many of these tropical regions, and bioavailability-based environmental risk assessment (ERA) approaches for metals have mainly been developed and tested in temperate regions, such as the United States and Europe. This paper reports on a multi-institutional, 5-y testing program to evaluate Ni exposure, effects, and risk characterization in the Southeast Asia and Melanesia (SEAM) region, which includes New Caledonia, Papua New Guinea, the Philippines, and Indonesia. Further, we have developed an approach to determine if the individual components of classical ERA, including effects assessments, exposure assessments, and risk c ....

New Caledonia , Papua New Guinea , United States , New Caledonia General , Society Of Environmental Toxicology Chemistry , Wiley Periodicals , Southeast Asia , Environ Assess Manag , Integrated Environmental Assessment , Environmental Toxicology , Bioavailability Based Approaches , Etals Risk Assessment , Ropical Risk Assessment , புதியது கலிடோனியா , பப்புவா புதியது கினியா , ஒன்றுபட்டது மாநிலங்களில் , புதியது கலிடோனியா ஜநரல் , தென்கிழக்கு ஆசியா , ஒருங்கிணைந்த சுற்றுச்சூழல் மதிப்பீடு , சுற்றுச்சூழல் நச்சுயியல் ,