期刊文献+
任意字段
题名或关键词
题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

Bioaccumulation of cadmium bound to humic acid by the bivalve Meretrix meretirx Linnaeus from solute and particulate pathways

Bioaccumulation of cadmium bound to humic acid by the bivalve Meretrix meretirx Linnaeus from solute and particulate pathways
下载PDF
导出
摘要 Humic acid is an important pool of heavy metals in sediments. Generally, the presence of refractory humic matter in aquatic systems would decrease the bioavailability of Cd and hence control the bioaccumulation of Cd in benthic animals. In the present work, we applied a suspending system to determine the relative importance of particulate and dissolved fractions of humic acid as Cd sources for the bivalve Meretrix meretrix and to investigate the difference of bioaccumulation characteristics of Cd adsorbed on different fractions of humic acid. The results showed that.the bioaccumulation characteristics of Cd from particulate and dissolved fractions of humic acid were apparently different due to biological responses of the clam to the particulates. At Cd concentration of 140 mg/kg, the accumulation of Cd from Cd associated with humic acid mixtures was mainly attributed to the dissolved fractions of humic acid. Compared to particulate fractions, Cd associated with the dissolved fractions of humic acid may be more bioavailable. Humic acid is an important pool of heavy metals in sediments. Generally, the presence of refractory humic matter in aquatic systems would decrease the bioavailability of Cd and hence control the bioaccumulation of Cd in benthic animals. In the present work, we applied a suspending system to determine the relative importance of particulate and dissolved fractions of humic acid as Cd sources for the bivalve Meretrix meretrix and to investigate the difference of bioaccumulation characteristics of Cd adsorbed on different fractions of humic acid. The results showed that.the bioaccumulation characteristics of Cd from particulate and dissolved fractions of humic acid were apparently different due to biological responses of the clam to the particulates. At Cd concentration of 140 mg/kg, the accumulation of Cd from Cd associated with humic acid mixtures was mainly attributed to the dissolved fractions of humic acid. Compared to particulate fractions, Cd associated with the dissolved fractions of humic acid may be more bioavailable.
作者 Xing Wu Yongfeng Jia Huijie Zhu He Wang
机构地区 Key Laboratory of Pollution Ecology and Environmental Engineering Graduate School of the Chinese Academy of Sciences
出处 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第2期198-203,共6页 环境科学学报（英文版）
基金 supported by the Ministry of Science and Technology of China through the National Basic Research Program (973) of China (No.2009CB426301) the National Natural Science Foundation of China (No.40773076)
关键词 humic acid BIOACCUMULATION CADMIUM Meretrix meretrix Linnaeus humic acid bioaccumulation cadmium Meretrix meretrix Linnaeus
分类号 S512.1 [农业科学—作物学] P618.51 [天文地球—矿床学]
  • 相关文献

参考文献38

  • 1Aiken G R, McKnight D M, Wershaw R L, MacCarthy P, 1985. Humic Substances in Soil, Sediment, and Water: Geochemistry, Isolation, and Characterization. John Wiley & Sons, New York.
  • 2Amot J A, Gobas F, 2006. A review of bioconcentration factor (BCF) and bioaccumulation factor (BAF) assessments for organic chemicals in aquatic organisms. Environmental Reviews, 14(4): 257-297.
  • 3Aualiitia T U, Pickering W F, 1987. The specific sorption of trace amotmts of Cu, Pb, and Cd by inorganic particulates. Water, Air, & Soil Pollution, 35(1-2): 171-185.
  • 4Beninger P G, Ward J E, Macdonald B A, Thompson R J, 1992. Gill fuction and particle-transport in placopectenmagellanicus (Mollusca Bivalvia) as revealed using video endoscopy. Marine Biology, 114(2): 281-288.
  • 5Bryan G W, L~mgston W J, 1992. Bioavailabiity, accumulation and effects of heavy metals in sediments with special reference to United-Kingdom estuaries - A review. Environmental Pollution, 76:89-131.
  • 6Buffle J, Greter F L, Haerdi W, 1977. Measurement of complexation properties of humic and fulvic acids in natural waters with lead and copper ion-selective electrodes. Analytical Chemistry, 49(2): 216-222.
  • 7Burton Jr G A, 1991. Assessing the toxicity of freshwater sediments. Environmental Toxicology and Chemistry, 10: 1585-1627.
  • 8Croisetiere L, Hare L, Tessier A, 2006. A field experiment to determine the relative importance of prey and water as sources of As, Cd, Co, Cu, Pb, and Zn for the aquatic invertebrate Sialis velata. Environmental Science & Technology, 40(3): 873-879.
  • 9Davies M S, Hawkins B J, 1998. Mucus from marine Molluscs. Advances in Marine Biology, 34: 1-71.
  • 10Decho A W, Luoma S N, 1994. Humic and fulvic acids - Sink or source in the availability of metals to the marine bivalves Macoma balthica and Potamocorbula amurensis. Marine Ecology-Progress Series, 108(2): 133-145.
Journal of Environmental Sciences
2010年 第2期

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