ning: 18.0pt; mso-bidi-font-weight: bold" lang=EN-US>History of Heavy Elements in the Last 250 Years Recorded by Sediments in Huguang Maar Lake (Huguangyan)

• 责任者：Lu Haiyan (State Key Laboratory of Loess and Quaternary Geology ; Institute of Earth Environment ; Chinese Academy of Sciences ; Xi’an 710075 ; China) ; Cao Junji
• 刊名：Marine Geology & Quaternary Geology
• 出版年：2010
• 卷期：30(1)
• 关键词：环境污染 ; environmental pollution ; 重金属 ; heavy metals ; 广东 ; Guangdong Province
• 页码：p.47-53
• 图表：6 illus., 2 tables, 29 refs.
• 分类号：1800
• issnNo：ISSN0256-1492
• isbnNo：CN37-1117/P

ning: 0pt" lang=EN-US>This paper is focused on the historic changes of heavy metals(V, Ni, Cu, Zn, and Pb) concentrations in sediments of the Huguang Maar Lake for the last 250 years. The environmental implication of heavy metals from core sediments was given by ¹³⁷Cs and ²¹⁰Pb isotope dating methods for the purpose of discussing the characteristic changes of heavy metals. The results showed that the concentrations of V, Ni, Cu, and Zn were slightly influenced by human activities, and the Igeo and EF reveal that these metals were considered as “unpolluted to mild polluted”. Pb was considered as “unpolluted to mild polluted” before 1920s and “moderately polluted” after 1920s.