Health & Environmental Research Online (HERO)


Print Feedback Export to File
547091 
Journal Article 
Concentration and Spatial Distribution of Bio-available Fraction of Heavy Metals in the Sediments from the Nanhai Lake 
Liang, Y; He, J; Lv, CW; Fan, QY; Bao, JH 
2009 
1 
Nongye Huanjing Kexue Xuebao / Journal of Agro-Environment Science
ISSN: 1672-2043 
28 
6 
1208-1213 
English 
The contents of bio-available fractions of Cu, Pb, Zn and Cd in sediments of the Nanhai Lake which was an abandoned channel of the Yellow River were analyzed in this work to study the geochemical behavior of heavy metals in lake sediments and the controlling factors. The results showed that the contents of bio-available fractions of Cu, Pb, Zn and Cd in surface sediments were ranked as Zn>Pb>Cu>Cd; The percentages of bio-available fractions in total contents were 23% for Cu, 75% for Pb, 42% for Zn, and 83% for Cd. Therefore, Cd and Pb presented more potential risk than the other two in surface sediments. The bio-available fractions of Cu, Pb and Zn in surface sediments of the central lake, southwest part and northeast part showed higher contents than other parts, while Cd showed higher bio-available fractions at the southwest part. The Cu and Cd in the sediment core were dominated with organic--bound fraction in their bio--available fractions, while Pb and Zn were dominated with Fe, Mn oxides-bound fraction in their bio-available fractions. Under the higher reducibility of the Nanhai Lake, the Pb, Zn and Cd presented potential risk to the water, because they were dominated with Fe, Mn oxides-bound fraction. Compared with the Yellow River, the condition of the Nanhai Lake was more propitious to the transformation of heavy metals into stable fractions. 
Article Subject Terms: Cadmium; Channels; Copper; Cores; Fluvial; Sediments; Geochemistry; Heavy Metals; Heavy metals; Lake deposits; Lakes; Lead; Manganese; Risk; Rivers; Sediment Contamination; Sediment; chemistry; Sediment pollution; Sediments; Spatial distribution; Transformation; Zinc; heavy metals; rivers; spatial distribution; Article Geographic Terms: China, People's Rep., Huang He R.; EE 30 Soil Pollution: Monitoring, Control & Remediation; Q5 01503; Characteristics, behavior and fate; AQ 00002 Water Quality; SW 3020; Sources and fate of pollution; P 2000 FRESHWATER POLLUTION; X 24360; Metals