缢蛏(Sinonovacula constricta)对海水中镉富集规律的研究

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Abstract

Cd bioaccumulation in Sinonovacula constricta under different Cd concentrations (0.005 mg·L^-1, 0.025 mg·L^-1, 0.05 mg·L^-1 and 0.1 mg·L^-1) was investigated using microwave digestion-graphite furnace atomic absorption spectrometry. The result showed that S. constricta had the ability to accumulate Cd²⁺ in seawater. The amount and rate of Cd bioaccumulation in soft tissue of S. constricta increased with increasing Cd²⁺ concentration in seawater; meanwhile, during the period of 168 h exposure time, Cd bioaccumulation and biological concentration multiples (BCM) in the mollusks were positively related to the exposure time (P<0.01). Furthermore, there were discrepancies of accumulation abilities, such as bioaccumulation amount, bioaccumulation rate and BCM. In different tissues of S. constricta, Cd accumulation in gills was more significant than in muscle, but less than in digestive glands. S. constricta is not a species with strong Cd-bioaccumulation ability as compared with other mollusks.

Key words： Sinonovacula constricta

Received: 25 August 2013

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	LU Hui-xian
	XU Yong-jian

Cite this article:

LU Hui-xian,XU Yong-jian. Study on cadmium bioaccumulation in Sinonovacula constricta[J]. , 2013, 32(4): 434-438.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2013/V32/I4/434