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引用本文:彭博,王继龙,同萌,武彬,刘晓强,牛淑杰,林沐东,张华,李茂田,于俊杰. 人类活动影响下福建三都澳近百年来重金属沉积记录及其对生态环境的影响[J]. 中国地质, 2021, 48(6): 1759-1769.
PENG Bo,WANG Jilong,TONG Meng,WU Bin,LIU Xiaoqiang,NIU Shujie,LIN Mudong,ZHANG Hua,LI Maotian,YU Junjie. Heavy metal deposition and its impact on ecological environment in Sanduao Bay of Fujian Province during the past century under the influence of human activities[J]. Geology in China, 2021, 48(6): 1759-1769(in Chinese with English abstract).
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人类活动影响下福建三都澳近百年来重金属沉积记录及其对生态环境的影响
彭博1, 王继龙1, 同萌2, 武彬1, 刘晓强2, 牛淑杰2, 林沐东2, 张华1, 李茂田2, 于俊杰1
1.中国地质调查局南京地质调查中心, 江苏 南京 210016;2.华东师范大学河口海岸国家重点实验室, 上海 201100
摘要:
因重金属难以被生物降解,易形成毒害环境因子,沉积物中的重金属污染演变是工业化以来全球共同面临的生态环境问题。为揭示福建三都澳地区人类活动与重金属沉积的关系,对采集自三都澳海域的6根岩心柱进行了系统的粒度分析、210Pb测年以及重金属元素测试。研究结果表明:(1)近百年来,三都澳海域沉积物重金属含量呈现显著增加趋势,顶部比底部增加1.01~2.8倍,并表现出3个明显演变阶段:1900-1950年,沉积物中的重金属含量相对稳定;1950-2000年,重金属含量开始缓慢增加;2000年以来,远岸区重金属含量急剧增加。这种变化趋势与人口、经济发展密切相关。(2)三都澳近岸区沉积物重金属含量总体大于远岸区,自2000年以来,近岸区和远岸区沉积物重金属含量的演变趋势呈现差异性,表现为近岸区重金属含量有所降低,远岸区重金属含量急剧升高,这种时空差异与沉积物粒度变化及地区产业分布有密切关系。(3)重金属对三都澳海洋生态环境影响较大,在湾内渔业养殖强度越来越高的背景之下,应对近期以来湾内重金属含量的快速升高给予足够重视,提高保护和修复治理力度,避免海洋生态破坏。
关键词:  重金属  海域沉积物  生态环境  人类活动  环境地质调查工程  三都澳  福建省
DOI:10.12029/gc20210608
分类号:P736.21+3;X171.1
基金项目:中国地质调查局项目(DD20189505)资助。
Heavy metal deposition and its impact on ecological environment in Sanduao Bay of Fujian Province during the past century under the influence of human activities
PENG Bo1, WANG Jilong1, TONG Meng2, WU Bin1, LIU Xiaoqiang2, NIU Shujie2, LIN Mudong2, ZHANG Hua1, LI Maotian2, YU Junjie1
1.Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China;2.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 201100, China
Abstract:
Heavy metals are difficult to be biodegraded, meanwhile easy to form toxic environmental factors. The evolution of heavy metals pollution in sediments is a common global ecological environmental problem since industrialization. To reveal the relationship between human activities and heavy metals deposition in Sanduao Bay of Fujian Province, 6 sediment cores were collected in the Bay for grain size testing, 210Pb dating and assay of Cu, Pb, Zn, Cr, As, Cd and Hg contents. The results show that over the past century, heavy metal contents in sediments of Sanduao Bay exhibit a significant increase trend. The top is 1.01-2.8 times higher than the bottom, and the evolution process can be divided into three stages, relatively stable period during 1900-1950s, slowly increasing during 1950-2000s, and sharply increasing since the 2000s. Those changes are closely related to population and economic development. The content of heavy metals in landward zone is generally higher than that in seaward zone, and the evolution trend of sediments in landward zone has been different from the sediments in seaward zone since 2000s. The heavy metals content of sediments in landward zone has decreased, while the heavy metals content of sediments in seaward zone has increased sharply in Sanduao Bay. This spatial difference is closely related to the change of grain size and regional industry distribution. Heavy metals have a great impact on the marine ecological environment of Sanduao Bay. As the increasing intensity of fish farming in the Bay, enough attention should be paid to the rapid increase of heavy metal contents in the Bay in recent years, so as to improve the management and remediation to avoid marine ecological damage.
Key words:  heavy metals  marine sediments  ecological environment  human activities  environment geological survey engineering  Sanduao Bay  Fujian Province