Natural and anthropogenic sources of lead, zinc, and nickel in sediments of Lake Izabal, Guatemala

作     者：Elisandra Hernandez Jonathan Obrist-Farner Mark Brenner William F.Kenney Jason H.Curtis Edward Duarte Elisandra Hernández;Jonathan Obrist-Farner;Mark Brenner;William F.Kenney;Jason H.Curtis;Edward Duarte

作者机构：Geosciences and Geological and Petroleum Engineering DepartmentMissouri Uniuersity of Science and Technology.RollaMO 65409USA. Department of Geological SciencesUniversity of FloridaGainesvilleFL 32611USA Land Use and Enuironmental Change InstituteUniuersity of FloridaGainesvilleFL 32611USA Escuela de QuimicaUniversidad de San Carlos de Guatemala01012Guatermala 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2020年第32卷第10期

页      面：117-126页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：Missouri University of Science and Technology and a graduate student research grant from the Geological Society of America for support the Center for Research in Energy and Environment for help using the ICP-OES 

主　　题：Lake Izabal Heavy metals Lead contamination Anthropogenic impacts Mining Guatemala 

摘      要：Sediments in Lake Izabal,Guatemala,contain substantial lead (Pb),zinc (Zn),and nickel (Ni).The lack of historical data for heavy metal concentrations in the sediments makes it difficult to determine the sources or evaluate whether inputs of metals to the lake have changed through *** measured the relative abundances and concentrations of Pb,Zn,and Ni by X-Ray Fluorescence core scanning and by Inductively Coupled Plasma Optical Emission Spectrometry in three sediment cores to explore stratigraphic distributions of metals in the lake *** amounts of Pb and Zn in the core taken near the Polochic Delta suggest that galena and sphalerite mining increased Pb and Zn delivery to Lake Izabal between ~1945 and 1965 *** up-core Ni increase in the core taken near a different mine on the north shore of Lake Izabal suggests that recent nickel mining operations led to an increase in Ni concentrations in the local sediments,but amounts in the other cores indicate that Ni is not widely distributed throughout the *** cores from Lake Izabal are reliable recorders of heavy metal input to the lake,and were measured to establish background metal levels,which would otherwise be *** of Pb,Zn,and Ni in older,pre-20th-century Lake Izabal sediments reflect input from natural erosion of *** results provide previously unavailable estimates of background metal concentrations in Lake Izabal before the onset of *** results are necessary for future monitoring related to mining contamination of the lake ecosystem.