Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
The fate of trace elements in reef depositional environments has not been extensively investigated. The aim of this study was to determine the partitioning of Pb in sediments of the Veracruz Reef System, and its relation to local environmental sources. Lead was determined in four geochemical fractions: exchangeable (3.8���0.4�μg�g−�1), carbonate (57.0���13.6�μg�g−�1), organic matter (2.0���0.9�μg�g−�1), and mineral (17.5���5.4�μg�g−�1). For the mineral fraction, lead concentrations were higher in those reefs influenced by river discharge or by long-distance transport of terrigenous sediments. The bioavailable concentration of lead (range: 21.9–85.6�μg�g−�1) indicates that the Veracruz Reef System is a moderately polluted area. As expected, the carbonate fraction contained the highest proportion of Pb (70%), and because the reef framework is largely made up of by biogenic carbonate sediments, hence, it is therefore the most important repository of Pb in coral reef depositional environments. � 2016 Elsevier Ltd
Universidad Nacional Aut�noma de M�xico, Facultad de Estudios Superiores Iztacala, UBIPRO, Av. de los Barrios 1, Los Reyes Iztacala, Tlalnepantla, M�xico, Mexico
Recommended Citation:
Horta-Puga G.. Geochemical partitioning of lead in biogenic carbonate sediments in a coral reef depositional environment[J]. Marine Pollution Bulletin,2017-01-01,116(2018-01-02)