Identification of Pb sources in Yellow Sea sediments using stable Pb isotope ratios

Lead isotopes as particulate contaminant tracers and chronostratigraphic markers in lake sediments in northeastern North America

“…Asia, and China in particular, are implicated in the 2001 trace metal inventory as being the largest source region for all trace metals from all sources (Pacyna and Pacyna, 2001). Since 2001, trace metal emissions from China and other similar developing countries have grown substantially (Lee et al, 2007).…”

“…Many lake sediments collected in North America exhibit changes in the Pb isotope record due to coal combustion and ore smelting after the early 19 th century and leaded gasoline use and phase out in the 20 th century (Graney et al, 1995;Lima et al, 2005;Marcantonio et al, 2002), while lake sediments collected in Asia show very little Pb isotopic activity prior to the late 20 th century since widespread economic development began very recently in Asia (Choi et al, 2007;Hao et al, 2008). Lakes in close proximity to major point sources such as non-ferrous metal smelters record input from the point source in the Pb isotopes in the sediment (Couillard et al, 2008;Gallon et al, 2006).…”

The origin of hydrothermal chlorite- and anhydrite-rich sediments in the middle Okinawa Trough, East China Sea

“…To separate the silicate fraction from the bulk samples and to minimize the dilution effect of biogenic components such as carbonates, we followed the 1 N HCl-leaching method in previous study (Shao et al, 2015) to process the bulk samples before the chemical digestion. The leaching process by 1 N HCl may greatly minimize the dilution effects of biogenic carbonates and some authigenic components (Choi et al, 2007;Dou et al, 2016), so the residues of hydrothermal sediments can better indicate the origins of chlorite-rich sediments relative to bulk samples. By doing so, we separated the leachable and residual phases, which may better discriminate the provenance and environmental signals registered in the bulk sediments.…”

“…By doing so, we separated the leachable and residual phases, which may better discriminate the provenance and environmental signals registered in the bulk sediments. This leaching method was also applied for provenance studies of fluvial and marine sediments in East Asian continental margin (Yang et al, 2004;Choi et al, 2007;Song and Choi, 2009;Dou et al, 2016). About 0.5 g sample was leached with 25 ml 1N HCl for 24 hours at 50°C to separate the leachates and residues.…”

Major threats of pollution and climate change to global coastal ecosystems and enhanced management for sustainability

“…(Osher et al, 2006;Nieto et al, 2007;Moreno et al, 2011;Popadic et al, 2013;Brady et al, 2014) 167.50 Guanabara Bay in Brazil (Alaoui et al, 2010) Zn Acid mine, mine, coke, ore, paints manufacturing, steel industry, industrial/domestic sewage, antifouling paints, oil spill (Osher et al, 2006;Nieto et al, 2007;Moreno et al, 2011;Popadic et al, 2013;Brady et al, 2014) 1005.00 Moulay Bousselham in Morocco (Borges et al, 2014) Pb Metal refineries/production, coal burning, metal refineries/ production, cement production, shipbuilding companies, natural weathering, oil spill (Moreno et al, 2011;Popadic et al, 2013;Chae et al, 2014) 384.68 Egyptian Mediterranean coast (El-Sorogy et al, 2016) Cd Acid mine, mine, coke, ore, lithogenic, phosphate fertilizers (Osher et al, 2006;Nieto et al, 2007;Dou et al, 2013;Brady et al, 2014) 28.88 Egyptian Mediterranean coast (El-Sorogy et al, 2016) Cr Paints manufacturing, oil combustion, geogenic source, shipping (combustion of oils), antifouling agents, oil spill (Osher et al, 2006;Moreno et al, 2011;Popadic et al, 2013;Brady et al, 2014;Keshavarzi et al, 2015) 347.00 Dhamara Estuary in India (Satapathy and Panda, 2015) Ni Oil combustion, geogenic source (Brady et al, 2014;Keshavarzi et al, 2015) 480. (Osher et al, 2006;Choi et al, 2007;Nieto et al, 2007;…”