[Heavy metal contents in insects collected from the Huludao City suffering pollution by zinc smelting and cholor-alkai production].
14 insect species, which were classified to three groups: the herbivorous, the polyphagous and the carnivorous, and earthworms were collected from the grasslands in Huludao City, Liaoning Province, China. Mercury, cadmium and lead contents in biota were determined to discuss the heavy metal pollution in organisms. Mercury, cadmium and lead contents were 0.168, 9.19 and 12.58 mg x kg(-1) in the herbivorous insects, respectively; 0.375, 24.43 and 17.71 mg x kg(-1) in the polyphagous insects, respectively; 0.928, 29.78 and 18.39 mg x kg(-1) in the carnivorous insects, respectively. It showed that heavy metal pollution in biota in Huludao City was heavy. Bioaccumulation abilities to heavy metals significantly differed with insect species. Snails and dragonflies could accumulate more mercury than the other insects and spiders could accumulate the most cadmium and lead in all insect species. These three metals investigated in insects were all sorted as the herbivorous < the polyphagous < the carnivorous. Cadmium and lead contents between the polyphagous and the carnivorous varied slightly. Correlation analysis showed that cadmium and lead contents were significantly related, but mercury and cadmium or mercury and lead were not. It indicated that cadmium and lead in insects were from the same pollution sources while mercury was more complex.
Zhang
Zhong-Sheng
ZS
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agriculture Ecology, Chinese Academy of Sciences, Changchun 130012, China. zzslycn@163.com
Wang
Qi-Chao
QC
Lü
Xian-Guo
XG
Zheng
Dong-Mei
DM
Sun
Xiao-Jing
XJ
Zhang
Xin-Yan
XY
Zhang
Shao-Qing
SQ
D000468:Alkalies / Q000032:analysis; D000818:Animals; D002104:Cadmium / Q000032:analysis; D002617:Chemical Industry; D002681:China; D002712:Chlorides / Q000032:analysis; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D007220:Industrial Waste; D007313:Insecta / Q000737:chemistry*; D007854:Lead / Q000032:analysis; D008628:Mercury / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D008906:Mining; D009835:Oligochaeta / Q000737:chemistry; D012908:Snails / Q000737:chemistry; D015032:Zinc
D000468:Alkalies; D002712:Chlorides; D004785:Environmental Pollutants; D007220:Industrial Waste; D019216:Metals, Heavy; D002104:Cadmium; D007854:Lead; D008628:Mercury; D015032:Zinc