QQ客服 官方微博 反馈留言

	福建深沪湾不同环境样品中总汞和甲基汞含量的分布; Distribution of total mercury and methyl mercury contents in samples collected from different environments of Shenhu Bay,Fujian
	林方芳 ; 袁东星 ; 刘锡尧 ; 林珊珊 ; 冯丽凤
	2013-08-15
关键词	海洋化学 总汞 甲基汞 分布 深沪湾 marine chemistry total mercury methyl mercury distribution Shenhu Bay
英文摘要	测定了福建省泉州深沪湾海水、沉积物和生物体中的总汞含量,测定了沉积物、生物体中的甲基汞含量.海水总汞含量范围是1.16~7.29 ng/dM3,平均值为3.32 ng/dM3.沉积物中总汞含量为0.006~0.066μg/g,甲基汞占总汞的比例为4.7%~38.6%,该比例与总汞含量呈负相关关系(r=-0.840,P<0.05),这可能是因为总汞含量的升高使甲基汞合成反应受到抑制,导致反应速率降低甚至为负,即甲基汞的分解.生物体中总汞含量为0.037~0.353μg/g(干重),甲基汞含量为1.01~42.50 ng/g(干重),甲基汞占总汞的比例为1.5%~40.4%.甲基汞含量与总汞含量显著相关(r=0.484,P<0.10);总汞含量与甲基汞占总汞比例略有相关(r=-0.293,P<0.10);甲基汞含量与其占总汞比例无相关性(r=0.061,P>0.05).可以推测,生物体中的总汞和甲基汞都是外源性的,不同生物体甲基汞占总汞的比例变化很大.对深沪湾居民进行海产品摄入量评估,以美国EPA规定的甲基汞参考计量0.1μg/(kg.d)为标准,计算得深沪湾周边居民每周食用3次(600g)湾内的海产品是安全的,不会产生汞中毒.未来还需要测定海水中甲基汞的含量,用以计算生物富集因子,表征不同生物对甲基汞的富集程度;通过测定鱼体中的δ13C、δ15n比值来确定不同鱼类的营养级,进而研究甲基汞的生物累积效应与营养级的关系.; Concentrations of total mercury(THg) and methyl mercury(MeHg) were determined in seawater,sediments and marine organisms collected from Shenhu Bay,Fujian.THg concentrations in seawater ranged from 1.16~7.29 ng/ dm3 with an average of 3.32 ng/dm3.The concentrations of THg in sediments were between 0.006 and 0.066 μg/g and MeHg contributed 4.7% to 38.6% of THg.Besides,the concentrations of THg in sediments were negatively correlated with the percentage of MeHg(r=-0.840,p<0.05),suggesting that higher THg concentrations,which inhibits MeHg synthesis,lead to lower,even negative methylation rates.Analysis results showed THg concentrations in marine organisms were 0.037~0.353 μg/g(dw),MeHg concentrations,1.01~42.50 ng/g(dw),with MeHg accounting for 1.5%~40.4% of the total.Moreover,the concentrations of THg and MeHg were significantly correlated(r=0.484,p<0.10).However,the percentage of MeHg were slightly correlated with THg concentrations(r=-0.293,p<0.10) and correlated little with MeHg concentrations(r=0.061,p>0.05).Therefore,it was speculated that THg and MeHg in the organisms were extraneous and the THg/MeHg rate varied greatly in different organisms.Based on the MeHg reference dose of 0.1 μg/(kg·d) regulated by EPA of the Unite State,estimation for human consumption for residents in Shenhu Bay has been assessed.Results showed that it would be safe to consume 600 g fish per week from Shenhu Bay.For further study,MeHg concentrations in seawater samples are needed for the calculation of bioaccumulation factor in order to indicate the biomagnification of MeHg in different organisms.Additionally,evaluating the trophic levels of fish using stable isotopes(δ13C and δ15N) is necessary to study the relationships of bioaccumulation effects and trophic level.; 国家海洋局海洋公益性行业科研专项资助项目(201105015)
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/108236]
专题	环境生态－已发表论文
推荐引用方式 GB/T 7714	林方芳,袁东星,刘锡尧,等. 福建深沪湾不同环境样品中总汞和甲基汞含量的分布, Distribution of total mercury and methyl mercury contents in samples collected from different environments of Shenhu Bay,Fujian[J],2013.
APA	林方芳,袁东星,刘锡尧,林珊珊,&冯丽凤.(2013).福建深沪湾不同环境样品中总汞和甲基汞含量的分布..
MLA	林方芳,et al."福建深沪湾不同环境样品中总汞和甲基汞含量的分布".(2013).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。