BCR three stage sequential extraction procedure was applied to examine the spatial occurrence characteristics and relative ratio of the speciation of Cr, Ni, Cu, Zn, As, Cd, Hg and Pb in the sediments from Danjiangkou reservoir, and meanwhile their stability and pollution assessment were discussed. All types of metals had obvious spatial heterogeneity; their high value was grouped in the middle of the reservoir, the west of tributaries and the northwest of Danjiang reservoir. Most metals mainly existed in residue state except for Pb and Cd, the reducible Pb and acid soluble Cd respectively accounted for 54.91% and 42.19% of the total content. The stability of eight studied metals was in the order of Cr >Pb >As >Ni >Cu >Hg >Zn >Cd. Cd was unstable in most studied sites, and there was higher risk of quick desorption and release.
李佳璐, 姜霞, 王书航, 王雯雯, 陈俊伊. 丹江口水库沉积物重金属形态分布特征及其迁移能力[J]. 中国环境科学, 2016, 36(4): 1207-1217.
LI Jia-lu, JIANG Xia, WANG Shu-hang, WANG Wen-wen, CHEN Jun-yi. Heavy metal in sediment of Danjiangkou Reservoir chemical speciation and mobility.. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(4): 1207-1217.
Huang X F, Hu J W, Li C X, et al. Heavy-metal pollution andpotential ecological risk assessment of sediments from Baihua Lake, Guizhou, P. R. China[J]. International Journal of Environmental Health Research, 2009,19(6):405-419.
Taylor M P. Distribution and storage of sediment-associated heavy metals downstream of the remediated Rum Jungle Mine on the East Branch of the Finniss River, Northern Territory, Australia[J]. Journal of Geochemical Exploration, 2007,92(1):55-72.
Mireles A, Solis C, Andrade E, et al. Heavy metal accumulation in plants and soil irrigated with waste water from Mexico city[J]. Nuclear Instruments and Methods in Physics Research B, 2004,219-220(6):187-190.
Pempkowiak J, Sikora A, Biemacka E. Speciation of heavy metals in marine sediments vs their bioaccumulation by mussels[J]. Chemosphere, 1999,39(2):313-321.
[10]
Shikazono N, Tatewaki K, Mohiuddin K M, et al. Sources, spatial variation, and speciation of heavy metals in sediments of the Tamagawa River in Center Japan[J]. Environmental Geochemistry and Health., 2012,34:13.
Davidson C M, Thomas R P, McVey S E, et al. Evaluation of a sequential extraction procedure for the speciation of heavy metals in sediments[J]. Analytica Chimica Acta, 1994,291(3):277-286.
[18]
Rauret G, Lopez-Sanchez J F, Sahuquillo A, et al. Improvement of the BCR three step sequential extraction procedure prior to the certification of new sediment and soil reference materials[J]. Journal of Environmental Monitoring, 1999,1(1):57-61.
[19]
Tessier A, Campbell P G C, Bisson M. Sequential extraction procedure for the speciation of particulate trace metals[J]. Analytical Chemistry, 1979,51(7):844-851.
[20]
Davidson C M, Thomas R P, McVey S E, et al. Evaluation of a sequential extraction procedure for the speciation of heavy metals in sediments[J]. Analytica Chimica Acta, 1994,291(3):277-286.
[21]
Chen S Y, Lin G J. Bioleaching of heavy metals from sediment:significance of pH[J]. Chemosphere, 2001,44:1093-1102.
[22]
Teasdale P R, Apte S C, Ford P W, et al. Geochemical cycling and speciation of copper in waters and sediments of Macquarie Harbour, Western Tasmania[J]. Estuarine, Coastal and Shelf Science, 2003,57:45-487.
Tack F M, Callewaert O W, Verloo M G. Metal solubility as a function of pH in a contaminated dredged sediment affected by oxidation[J]. Environmental Pollution, 1996,91(2):199-208.
[29]
Wallschlager D, Desai M V, Spengler M. How humic substances dominate mercury geochemistry in contaminated floodplain soil and sediments[J]. Journal of Environmental Quality, 1997,27:1044-1054.
[30]
金相灿.沉积物污染化学[M]. 北京:中国环境科学出版社, 1992:376.
[31]
Singh K P, Mohan D, Singh V K, et al. Studies on distribution and fractionation of heavy metals in Gomti river sediments-a tributary of the Ganges, India[J]. Journal of Hydrology, 2005, 312(1-4):14-27.
