The toxic effects of Cd and Cu in freshwater sediments on Corbicula fluminea
SHEN Hong-yan1,2, CAO Zhi-hui1,2, ZHANG Hong-yan1,2, ZHU Ling-yan3
1. School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050080, China;
2. Medical Molecular Chemistry Lab of Hebei Province, Shijiazhuang 050080, China;
3. Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education, Tianjin Key Laboratory of Remediation & Pollution Control for Urban Ecological Environment, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
To study the effects of heavy metal Cd and Cu in freshwater sediment on the freshwater benthic organism, the burrowing behavior of Corbicula fluminea within 12 hours and survival rate during 10days were analyzed. The results showed that Corbicula fluminea exhibited a significant avoidance behavior to the spiked Cd and Cu in freshwater sediment. Within 12 hours, the response of Corbicula fluminea to Cd in sediment is more sensitive than Cu. Under exposure to Cd and Cu at 10mg/kg, the burrowing rate of Corbicula fluminea were 0.39 and 0.43, respectively. In the survival test during 10 days, the survival rate of Corbicula fluminea decreased corresponding to the increase of Cd and Cu concentrations. At 10mg/kg of spiked Cd in sediments, the survival rate of Corbicula fluminea was 93.3%. However, the survival rate dropped to 43.3% at 300mg/kg. For spiked Cu in sediment, the survival rate of Corbicula fluminea was 96.3% at 10mg/kg and decreased to 34.3% at 500mg/kg. The LC50 of Corbicula fluminea were 285mg/kg for spiked Cd and 690mg/kg for spiked Cu, respectively. All these data revealed that Corbicula fluminea was more sensitive to the toxicity of Cd. By comparing the indicative features of burrowing behavior and survival rate of Corbicula fluminea when exposed to heavy metal Cd and Cu, burrowing behavior was found to be more quickly and more obviously than survival rate., indicating that a high priority should be given to burrowing behavior in heavy metal contamination monitoring.
沈洪艳, 曹志会, 张红燕, 祝凌燕. 淡水沉积物中Cd和Cu对河蚬的毒性效应研究[J]. 中国环境科学, 2016, 36(1): 286-292.
SHEN Hong-yan, CAO Zhi-hui, ZHANG Hong-yan, ZHU Ling-yan. The toxic effects of Cd and Cu in freshwater sediments on Corbicula fluminea. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(1): 286-292.
Halliwell B, Guttefidge J M C. Free radicals in biology and medicine[M]. New York:Oxford University Press, 1999.
[4]
Mireille B Toledano, Anna L Hansell, Lars Jarup, et al. Temporal trends in orchidopexy, Great Britain, 1992-1998[J]. Environ. Health. Perspect., 2003,111(1):129-132.
Gillis P L, Wood C M. Investigating a potential mechanism of Cd resistance in Chironomus riparius larvae using kinetic analysis of calcium and cadmium uptake[J]. Aquat. Tloxicol., 2008,89:180-187.
Pasteris A, Vecchi M, Reynoldson T B, et al. Toxicity of copper-spiked sediments to Tubifex tubifex (Oligochaeta, Tubificidae):a comparison of the 28-day reproductive bioassay with a 6-month cohort experiment[J]. Aquat. Toxicol., 2003, 65(3):253-265.
[12]
EPA-823-B-01-002# Methods for collection, storage and manipulation of sediments for chemical and toxicological analyses:technical manual[S].
Cataldo D, Boltovsloy D, Bitos C, et al. Environmental toxicity assessment in the Parana river delta (Argentina):simultaneous evaluation of selected pollutants and mortality rates of Corbicula fluminea (Bivalvia) early juveniles[J]. Environmental Pollution, 2001,112:379-389.
