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| Distribution of Acid Volatile Sulfide and Simultaneously Extracted Metals and Bioavailability of Heavy Metals in Sediments from Lake Daihai |
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| KeyWord:acid volatile sulfide; simultaneously extracted metals; sediment; Lake Daihai |
| Author Name | Affiliation | | Nandingqiqige | College of Life Science, Inner Mongolia University, Hohhot 010021, China | | HE Jiang | College of Life Science, Inner Mongolia University, Hohhot 010021, China
College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China
Institute of Environmental Geology, Inner Mongolia University, Hohhot 010021, China | | Lu Chang-wei | College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China
Institute of Environmental Geology, Inner Mongolia University, Hohhot 010021, China | | Dudagula | College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China | | ZHANG Jing | College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China | | LI Chuan-zhen | College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China | | GUO Xia | College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China | | HOU Zhao-jie | College of Environment and Resources, Inner Mongolia University, Hohhot 010021, China |
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| Abstract: |
| Heavy metals in lake sediments have long-term potential risks to the environment. In this paper, the concentrations of acid volatile sulfide（AVS） and simultaneously extracted metals（SEM） were analyzed and the potential ecological risks of heavy metals evaluated in the sediment samples from Lake Daihai. The AVS concentrations ranged from 2.72 μmol·g-1 to 98.49 μmol·g-1 with an average of 21.71 μmol·g-1, increasing from northwest to southeast in horizontal distribution; the ΣSEM concentrations varied from 6.99 μmol·g-1 to 22.51 μmol·g-1 with a mean of 15.51 μmol·g-1, showing an increase from southeast to northwest. The AVS and ΣSEM concentrations in the sediment cores ranged from 4.20 μmol·g-1 to 114.91 μmol·g-1 and 7.67~21.10 μmol·g-1, respectively, with greater variation in AVS than in ΣSEM concentrations. The ratios of ΣSEM/AVS were higher than 1 in the surface sediments from DH-1, DH-2, DH-3, DH-5, DH-10 and DH-12 sites, indicating potential ecological risks of heavy metals to aquatic organism at these sites. Cd, Hg and As in the surface sediments and sediment cores might not, but Cu, Pb and Zn might have toxicity to aquatic organisms. |
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