geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Movement and transformation of heavy metals in water-sediment in water-level-fluctuating zone of Three Gorges Reservoir Area


, : Movement and transformation of heavy metals in water-sediment in water-level-fluctuating zone of Three Gorges Reservoir Area. Huan Jing Ke Xue= Huanjing Kexue 30(12): 3481-3487

According to the off-season regulation model for Three Gorges Reservoir, the characteristic of movement and transformation of Cu, Pb, Cd and Cr in sediment of water-level-fluctuating zone of Three Gorge Reservoir Area was investigated. The results indicated that the chemical fraction composition characteristics of heavy metals are different. Cu mainly existed in organic/sulphidic fraction and residual fraction; Pb mainly existed in carbonates, Fe-Mn oxides and residual fraction; Cd mainly existed in carbonates and Fe-Mn oxides fraction; Cr mainly existed in residual fraction. In flood season, the exposure of sediment from river bottom to atmosphere caused the decrease of TOC, AVS and pH and increase of ORP, and lowered the amount of extractable heavy metals. Heavy metals have the tendency to release to water body. The migration rates of Cu, Pb, Cd and Cr were 30.50%, 26.10%, 33.50%, and 11.77% respectively, the migration ability of heavy metals followed: Cd > Cu > Pb > Cr. The contributions of extractable fractions of Cu, Pb, Cd and Cr to the migrated heavy metals were 77.15%, 86.09%, 94.86%, and 32.34% respectively, extractable fraction was the mainly part of the migrated heavy metals. The off-season regulation model for Three Gorges Reservoir lowered the ecological harm of heavy metals, the concentrations of Cu, Pb, Cr, Cd in the study areas were low.

US$29.90

PMID: 20187375


Other references

Zayats, L.M., 1995: Air pollution and pulmonary vessels. The experiments on white rats provided histological and electron-microscopic evidence on the damage which may be done to pulmonary vessels by the chemicals present in polluted atmospheric air. There appeared impairment of vascular permeability and...

Cossins E.A.; Chan P.Y.; Combepine G., 1975: Stimulation of folate synthesis by exogenous glycine in neurospora crassa wild type. Plant Physiology (Rockville) 56(2 SUPPL): 59

Luck, R.F.; Scriven, G.T., 1976: The elm leaf beetle pyrrhalta luteola in southern california usa its pattern of increase and its control by introduced parasites. A 2-yr study of elm leaf beetle (ELB), Pyrrhalta luteola (Mueller), populations was conducted at 2 locations in southern California [USA] during 1973 and 1974 to determine its phenology and seasonal pattern of increase, its seasonal pattern of def...

Fritzmeier, F.; Kronsbein, H., 1982: Clinic and pathogenesis of the medial cervical cleft. A contribution to the differential diagnosis of the cervical cleft. The midline cervical cleft is a rare malformation related to the cleft of the lower lip and mandible. In this group it is the least pathological form. The clinical and histological findings could lead to misdiagnosing, those as caused by fistulas...

Morassutti, A.L.; Graeff-Teixeira, C., 2012: Interface Molecules of Angiostrongylus cantonensis: Their Role in Parasite Survival and Modulation of Host Defenses. Angiostrongylus cantonensis is a nematode parasite that causes eosinophilic meningoencephalitis in humans. Disease presents following the ingestion of third-stage larvae residing in the intermediate mollusk host and disease manifests as an acute i...

Benson, Sally D., 2005: Snow days. American Nurseryman 201(4

Steiner, D.F.; Ohagi, S.; Nagamatsu, S.; Bell, G.I.; Nishi, M., 1991: Is islet amyloid polypeptide a significant factor in pathogenesis or pathophysiology of diabetes?. Islet amyloid polypeptide (IAPP) or amylin, a recently discovered minor secretory peptide of the beta-cell related to calcitonin gene-related peptide (CGRP), is a constituent of amyloid deposits in the islets of many non-insulin-dependent (type II...

Zentmyer, Ga, 1975: The root environment in relation to growth and survival of plant pathogens: an introduction. Biology and Control of Soil Borne Plant Pathogens International Symposium: ub 1975), 3d 38

Shannon L.V.; Henry J.L., 1983: Phyto plankton primary production in the benguela south africa current from ship and satellite measurements. South African Journal of Science 79(4): 144

Spaic, I., 1964: Experimental control of bark-beetles on Pinus halepensis using the osmosis method. Describes continued work, on the island of Losinj, on the control of Myelophilus piniperda, Orthotomicus erosus and Pityogenes calcaratus with Xylamon paste applied to P. halepensis trap-trees. The method failed, owing to the differing flight peri...