近百年来长江中游牛轭湖沉积物铅元素富集记录及其环境意义——以长江荆江段牛轭湖群为例

doi:10.11870/cjlyzyyhj201511018

摘要/Abstract

摘要： 通过对长江荆江段天鹅洲、中洲子和尺八3个牛轭湖钻孔沉积物进行短寿命放射性核素、粒度、磁学、铅元素测试与史志资料分析,在利用²¹⁰Pb比活度计算平均沉积速率,并结合史志资料与沉积物特征指示的事件进行沉积物年代校核基础上,运用地表物质非自然富集系数(EF值)方法,分析了牛轭湖沉积物铅元素富集状况。结果表明:三钻孔铅元素非自然因素富集特征基本一致,均起始于20世纪80年代初,并于2000年后呈下降状态,与我国铅污染历史及禁用含铅汽油的时间基本吻合;利用沉积物中铅元素非自然因素富集事件对沉积物进行断代分析,具有一定的可行性;牛轭湖河/湖沉积相转变未对沉积物铅元素的非自然因素富集产生影响,说明铅污染具有较广的“暴露面”。

关键词: 牛轭湖沉积, 铅元素, 非自然因素富集, 沉积事件

Abstract: High-resolution and highly precise lead record for recent lake sediments (last 50-100 years) are essential for quantitative paleoenvironment research. Sample cores TE with a length of 85 cm, ZZ-2 with a length of 89cm and CB-1 with a length of 91cm were drilled in the deepest part of Tian'ezhou, Zhongzhouzi and Chiba oxbow Lakes by the Gravity Impact Core Sampler in Jingjiang section of the Yangtze River during November 2012. They were divided into sediment samples in which a set interval is applied to pick about every 1 cm. They were selected for understanding the Pb enrichment conditions and its environment significancs of oxbow lake sediments by using enrichment factor analysis. Dating of the ²¹⁰Pb, characteristics of the grain size, frequency dependent susceptibility and element contents (Al and Pb) were analyzed. By the analyses of grain-size parameters and magnetic parameters of cores TE and ZZ-2 two stages of oxbow lake sediments,which named layer A (lower) and layer B (upper) can be distinguished. According to the average deposition rate and the diagnostic characteristics of the grain size and frequency dependent susceptibility, the possible sediment depth of the river/lake transformation event layer was found. After combining local chronicles with environmental events such as river/lake transformation events and flood events, which indicated by sediment characteristics, the high-resolution chronological sequence were set up. Three cores disclosed the lead enrichment records and its environment significancs of oxbow lakes. The results of the lead enrichment records show that, the characteristics of Pb unnatural enrichment in three cores are mostly identical. They all began in the early 1980s and declined in the 2000. Based on the high-resolution age of deposition rate and environmental events, which was closely related with the lead pollution history such as the beginning of the lead pollution and 2000 which the year of leaded petrol has been banned in China, it is thought that the result is caused by human activity impacts. By comparing and contrasting three lead enrichment records of three sample cores, the similar trend of three curves were found. It is indicated that oxbow lakes' river/lake sedimentary facies had no effects on the unnatural enrichment of Pb element. Based on the above study, it reveals that the possibility of using the unnatural enrichment events of Pb element as a time marker in the study area.

Key words: Oxbow Lake Sediments, lead element, unnatural enrichment, sedimentary events

中图分类号:

P951

贾铁飞, 王峰, 王阿敏, 张猛. 近百年来长江中游牛轭湖沉积物铅元素富集记录及其环境意义——以长江荆江段牛轭湖群为例[J]. 长江流域资源与环境, 2015, 24(11): 1935-1943.

JIA Tie-fei, WANG Feng, WANG A-min, ZHANG Meng. SEDIMENT LEAD ENRICHMENT RECORDS AND ITS ENVIRONMENT SIGNIFICANCS OF OXBOW LAKES IN JINGJIANG SECTION OF THE YANGTZE RIVER DURING LAST 100 YEARS[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2015, 24(11): 1935-1943.

参考文献

[1] HONG S, CANDELONE J P, PATTERSON C C, et al. Greenland ice evidence of hemispheric lead pollution two millennia ago by Greek and Roman civilizations[J]. Science, 1994, 265(5180): 1841-1843.
[2] RENBERG I, PERSSON M W, EMTERYD O. Pre-industrial atmospheric lead contamination detected in Swedish lake sediments[J]. Nature, 1994, 368: 323-326.
[3] 丛志远,康世昌,郑伟,等.偏远地区铅和汞的现代过程与历史记录研究综述[J].地理学报,2010,63(3):351-360.
[4] DÖRR H, MÜNNICH K O. Lead and cesium transport in European forest soils[J]. Water, Air, and Soil Pollution, 1991, 57-58(1): 809-818.
[5] 姚书春,薛滨,朱育新,等.长江中下游湖泊沉积物铅污染记录——以洪湖、固城湖和太湖为例[J].第四纪研究,2008,28(4):659-666.
[6] BOYLE J F, ROSE N L, APPLEBY P G, et al. Recent Environmental change and human impact on Svalbard: the lake-sediment geochemical record[J]. Journal of Paleolimnology, 2004, 31(4): 515-530.
[7] SIVER P A, WIZNIAK J A. Lead analysis of sediment cores from seven Connecticut lakes[J]. Journal of Paleolimnology, 2001, 26(1): 1-10.
[8] NDZANGOU S O, RICHER-LAFLECHE M, HOULE D. Sources and evolution of anthropogenic lead in dated sediments from lake Clair, Québec, Canada[J]. Journal of Environmental Quality, 2005, 34(3): 1016-1025.
[9] 王琳淼,李广雪.黄海与东海泥质区高分辨率沉积记录研究新进展[J].海洋地质与第四纪地质,2014,34(3):167-174.
[10] 刘恩峰,沈吉,朱育新,等.太湖表层沉积物重金属元素的来源分析[J].湖泊科学,2004,16(2):113-119.
[11] HAO Y C, GUO Z G, YANG Z S, et al. Tracking historical lead pollution in the coastal area adjacent to the Yangtze River Estuary using lead isotopic compositions[J]. Environmental Pollution, 2008, 156(3): 1325-1331.
[12] WANG L M, LI G X, GAO F, et al. Sediment records of environmental changes in the south end of the Zhejiang-Fujian coastal mud area during the past 100 years[J]. Chinese Journal of Oceanology and Limnology, 2014, 32(4): 899-908.
[13] STRAHLER A N,STRAHLER A H.现代自然地理学[M].《现代自然地理学》翻译组译 .北京:科学出版社,1983.
[14] WOLFE B B, HALL R I, LAST W M, et al. Reconstruction of multi-century flood histories from oxbow lake sediments, Peace-Athabasca Delta, Canada[J]. Hydrological Processes, 2006, 20(19): 4131-4153.
[15] BROOKS G R, MEDIOLI B E. Deposits and cutoff ages of horseshoe and Marion Oxbow lakes, Red river, Manitoba[J]. Géographie physique et Quaternaire, 2003, 57(2/3): 151-158.
[16] 贾铁飞,王峰,袁世飞.长江中游沿江牛轭湖沉积物及其环境意义——以长江荆江段天鹅湖、中洲子为例[J].地理研究,2015,34(5):861-871.
[17] 湖北省石首市地方志编纂委员会.石首县志[M].北京:红旗出版社,1990.
[18] 湖北省监利县地方志编纂委员会.监利县志[M].武汉:湖北人民出版社,1994.
[19] 李键,张维,陈敬安,等.一种可实现不同水深条件下采样的湖泊沉积物柱芯采样装置[J].地球与环境,2011,39(1):121-124.
[20] APPLEBY P G, NOLAN P J, GIFFORD D W, et al. ²¹⁰Pb dating by low background gamma counting[J]. Hydrobiologia, 1986, 143(1): 21-27.
[21] HAKANSON L,JANSSON M.湖泊沉积学原理[M].郑光膺译 .北京:科学出版社,1992.
[22] 董瑞斌,张卫国,卢升高,等.土壤和沉积物的磁参数及其在环境科学中的应用[J].科技通报,2000,16(6):479-483.
[23] 万国江.现代沉积的²¹⁰Pb计年[J].第四纪研究,1997(3):230-239.
[24] 荆州市长江河道管理局.荆州堤防志[M].北京:中国水利水电出版社,2012.
[25] 贾铁飞,张卫国,俞立中.1860s以来巢湖沉积物金属元素富集特点及其对人类活动的指示意义[J].地理研究,2009,28(5):1217-1226.
[26] WILLIAMS T P, BUBB J M, LESTER J N. Metal accumulation within salt marsh environments: A review[J]. Marine Pollution Bulletin, 1994, 28(5): 277-290.
[27] 邴海健,吴艳宏,刘恩峰,等.长江中下游不同湖泊沉积物中重金属污染物的累积及其潜在生态风险评价[J].湖泊科学,2010,22(5):675-683.
[28] 贾铁飞,张卫国,俞立中,等.近800年来巢湖沉积物营养元素富集特点及其环境演变意义[J].地理科学,2009,29(6):893-899.

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