Distribution of AVS-SEM, transformation mechanism and risk assessment of heavy metals in the Nanhai Lake in China

Distribution of AVS (acid volatile sulfide)-SEM (simultaneously extracted metals), transformation mechanism and risk assessment of heavy metals in the Nanhai Lake in Baotou City were discussed in this work. The results showed that the content of heavy metals in sediments increased due to the water p...

Full description

Saved in:
Bibliographic Details
Published in:Environmental earth sciences 2011-12, Vol.64 (8), p.2025-2037
Main Authors: He, Jiang, Lü, Changwei, Fan, Qingyun, Xue, Hongxi, Bao, Jinhua
Format: Article
Language:English
Subjects:
Acute toxicity
Aquatic plants
Bioavailability
Biogeosciences
Contaminated sediments
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environmental Science and Engineering
Exact sciences and technology
Geochemistry
Geology
Heavy metal content
Heavy metals
Household wastes
Hydrology
Hydrology. Hydrogeology
Hydrology/Water Resources
Lakes
Original Article
Pollution, environment geology
Risk assessment
Sediments
Sewage
Soil and rock geochemistry
Sulfides
Terrestrial Pollution
Vertical distribution
Water depth
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Distribution of AVS (acid volatile sulfide)-SEM (simultaneously extracted metals), transformation mechanism and risk assessment of heavy metals in the Nanhai Lake in Baotou City were discussed in this work. The results showed that the content of heavy metals in sediments increased due to the water pumped from the Yellow River, domestic sewage, municipal runoff and yacht waste release. Increasing water depth, domestic sewage influx and hydrophyte booming made the AVS level higher in downstream than upstream. The vertical distribution of AVS is characterized as multiple-peak in the sediment cores from the studied lake. Comparatively, the control abilities of the carbonate and sulfate to the heavy metals were five orders of magnitude lower than the sulfide phase. Therefore, AVS was the key factor controlling the precipitation of heavy metals in the Nanhai Lake. The ratio of SEM/AVS in the sediments, the acute sediment quality criteria and the chronic sediment quality criteria indicated that no acute toxicity for benthic organisms can be expected, and the AVS plays an important role in controlling the bioavailability and toxicity of heavy metals in the Nanhai Lake.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-011-1022-z