期刊文献+

长江口滨岸潮滩重金属源汇通量估算 被引量:14

Estimation of source and sink fluxes of heavy metals in tidal flat of the Yangtze Estuary
下载PDF
导出
摘要 根据2002~2003年长江口滨岸潮滩16个站位1年的沉积物重金属含量、粒度和密度等季节性测试数据,结合其他文献的沉积物累积速率资料,初步估算了长江口滨岸潮滩重金属的源汇通量。结果表明,2002年徐六泾以下的河口地区,沉积物中Cu、Pb、Fe、Mn、Zn、Cr的年滞留量分别为3425t/a、2751t/a、3451599t/a、69505t/a、14045t/a和3176t/a,石洞口排污口和黄浦江仍然是这几种重金属的主要污染输入来源之一。潮滩能有效滞留河口水体中的重金属,在长江口0m线以上的潮滩沉积物中,Cu、Pb、Fe、Mn、Zn、Cr的年沉降量分别占到整个河口区重金属沉降量的24.3%、27.6%、32.3%、32.4%、20.5%和23.2%。从潮滩重金属的沉降通量来看,南汇边滩的沉降通量最大,长江口南岸潮滩明显高于长江口北支潮滩,说明位于排污口下游的滩地能有效削减入海重金属污染负荷。 Source and sink fluxes of heavy metals in intertidal flat of the Yangtze Estuary were estimated based on the seasonal data of heavy metal concentration, particle size and density of sediments over a year period from 2002 to 2003, combined with the deposition flux of sediments from other documents. The results show that the annual deposition quantities of Cu, Pb, Fe, Mn, Zn and Cr were 3 425 t/a, 2 751 t/a, 3 451 599 t/a, 69 505 t/a, 14 045 t/a and 3 176 t/a in lower estuary from Xuliujing in 2002. Shidongkou sewage outlet and the Huangpu River were the major pollution sources of these six elements. Tidal flat can effectively reduce heavy metals in estuary water. Retention of Cu, Pb, Fe, Mn, Zn and Cr in intertidal flat above 0-meter isobath of the Yangtze Estuary was separately 24. 3%, 27.6%, 32. 3%, 32. 4%, 20.5% and 23.2% of their total deposition quantity in lower estuary from Xuliujing. Spatially, the maximum deposition fluxes of heavy metals appeared at section Nanhui and the fluxes in southern coast were higher than those in the north branch of the Yangtze Estuary, suggesting that the intertidal flat located in the lower reaches of sewage outlet played an important role in reducing heavy metal pollutants entering the estuary water.
出处 《地球化学》 CAS CSCD 北大核心 2006年第2期187-193,共7页 Geochimica
基金 国家自然科学基金重点项目(40131020) 上海市基础研究重点项目(05JC14059) 教育部优秀青年教师资助计划项目 上海市环保局招标项目
关键词 重金属 源汇通量 潮滩 长江口 heavy metal source and sink fluxes tidal flat Yangtze Estuary
  • 相关文献

参考文献24

  • 1Turner A, Millward G E, Tyler A O. The distribution and chemical composition of particles in a maerotidal estuary[J]. Estuar Coast Shelf Sci, 1994, 38(1): 1-17.
  • 2Zhang Jing. Geochemistry of trace metals from Chinese river/estuary systems: An overview[J]. Estuar Coast Shelf Sei, 1995,41(6): 631-658.
  • 3Chiffoleau J-F, Auger D, Chattier E. Fluxes of selected trace metals from the Seine estuary to the eastern English Channel during the period August 1994 to July 1995[J]. Continent Shelf Res,1999, 19(15/16): 2 063 -2 082.
  • 4Michel P, Boutier B, Chiffoleau J-F. Net fluxes of dissolved arsenic, cadmium, copper, zinc, nitrogen and phosphorus from the Gironde estuary (France): Seasonal variations and trends[J].Estuar Coast Shelf Sci, 2000, 51(4): 451 -462.
  • 5Feng Huan, Cochran J K, Lwiza H, Brownawell B J, Hirschberg D J. Distribution of heavy metal and PCB contaminants in the sediments of an urban estuary: The Hudson River[J]. Mar Environ Res, 1998, 45(1): 69-88.
  • 6Rees J G, Ridgway J, Knox R W O B, Wiggans G, Breward N.Sediment-borne contaminants in rivers discharging into the Humber estuaty, UK[J]. Mar Pollut Bull, 1999, 37(3-7): 316-329.
  • 7Bricker S B. Retention of sediment and metals by Narragansett Bay subtidal and marsh environments: An update[J]. Sci Total Environ, 1996, 179:27-46.
  • 8Fox W M, Johnson M S, Jones S R, Leah R T, Copplestone D.The use of sediment cores h'om stable and developing salt marshes to reconstruct historical contamination profiles in the Mersey Estuary, UK[J]. Mar Environ Res, 1999, 47(4): 311-329.
  • 9Chen Z, Kostaschuk R, Yang M. Heavy metals on tidal flats in the Yangtze Estuary, China[J]. Environ Geol, 2001, 40(6): 742-749.
  • 10Lee S V, Cundy A B. Heavy metal contamination and mixing processes in sediments from the Humber Estuary, eastern England[J]. Estuar Coast Shelf Sci, 2001, 53(5): 619-636.

二级参考文献81

共引文献198

同被引文献322

引证文献14

二级引证文献150

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部