Changes in Element Concentrations in Moss Segments After Cross-Transplanting Between a Polluted and Non-Polluted Site     

G. Tabors  G. BrŪmelis  L. Lapina  G. Pospelova  O. Nikodemus 《Journal of Atmospheric Chemistry》2004,49(1-3):191-197

To test the ability of Hylocomium splendens segments to retain absorbed heavy metals (Fe, V and Pb) and some physiological elements (Ca, Mg and K) over a period of some years, moss turf was cross-transplanted between polluted and background sites. Thereby it was possible to determine how quickly the concentrations in moss can reach chemical equilibrium with the atmospheric inputs. At a particular site (background or polluted), the physiological elements in transplanted material quickly reached the levels in the non-transplanted moss. For the heavy metals, the concentrations remained stable over 3 years in moss cross-transplanted from a polluted to a background site. There appeared to be inherent differences between moss at the background and polluted sites in the ability to absorb and accumulate heavy metals.  相似文献   

Behaviour of metallic and radioactive elements in lagoonal sediments: the example of the Canet-St Nazaire Pond (Mediterranean coast)     

M. Bernat  G. Cauwet  B. Chassefiere  D. Faguet  F. Gadel  A. Monaco  M. Ouakad  Y. Thommeret 《Estuarine, Coastal and Shelf Science》1984,18(5):557-570

The behaviour of Ca, Mg, Na, K, Fe, Mn, Zn and radionuclides (U, Th, Pb, Ra) was studied in water, suspensions and sediments of an euxinic lagoonal environment of the French Mediterranean coast. The dynamic of these elements at the sediment-water interface is considered particularly in relation to the redox conditions, the nature of inorganic and organic supports and the sedimentation rate.  相似文献   

Influence of point sources on trace metal contamination and distribution in a semi-enclosed industrial embayment: the Ferrol Ria (NW Spain)   总被引：4，自引：0，他引：4  

Antonio Cobelo-García  Ricardo Prego 《Estuarine, Coastal and Shelf Science》2004,60(4):695-703

Concentrations of heavy metals (Co, Cr, Cu, Fe, Ni, Pb and Zn), particulate organic (POC) and nitrogen (PON), particulate inorganic carbon (PIC) and opal content were measured in 35 surface sediment samples taken in the Ferrol Ria (Galicia, NW Spain). This ria is a semi-enclosed embayment receiving inputs from industrial and urban effluents. The restricted water exchange between the ria and the shelf has led to a significant accumulation of contaminants within the embayment. Two main factors controlled the metal distribution and concentrations in the bay: (1) contamination point sources and (2) distribution of the organic-rich sediments. Zn, Cu and, to a lesser extent Pb, were the metals most contaminated in the bay, with average enrichment factors (AEF)—defined as the mean metal concentration in the bay divided by the background value reported for this ria—of 4.7, 5.5 and 2.7, respectively. The highest concentrations for these metals were observed in the vicinity of the point sources. Values found for Zn, Cu and Pb are comparable to other industrialized coastal areas in the world. For Ni, Fe, Cr and Co a negligible to low contamination was found (AEF = 1–2), with the highest concentrations found in the organic-rich sediments.  相似文献   

海草污染生态学研究进展   总被引：2，自引：0，他引：2  

黄道建  黄小平 《海洋湖沼通报》2007,(Z1)

本文对国外近20年来在海草污染生态学方面的研究成果进行了综述。这些成果主要包括重金属、农药和石油对海草的影响。重全属时海草影响的研究重点.是重金属对海草生理功能的影响,以及海草对重金属的富集等方面;农药对海草的影响研究.集中于其对海草的生理学和形态学方面的影响。以及海草对农药的耐性等;而石油对海草的影响研究.主要是事故性石油污染和石油分散剂对海草的影响。最后,本文展望了该领域今后的研究重点与方向。  相似文献   

Characterization of suspended particulate matter surrounding a salmonid net-pen in the Broughton Archipelago, British Columbia   总被引：2，自引：0，他引：2  

Sutherland  T. F.; Martin  A. J.; Levings  C. D. 《ICES Journal of Marine Science》2001,58(2):404-410

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The distribution of some metallic elements in eelgrass (Zostera marina L.) and sediment in the Limfjord,Denmark     

Hans Brix  Jens Erik Lyngby 《Estuarine, Coastal and Shelf Science》1983,16(4):455-467

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台湾海峡西部海域沉积物中重金属的地球化学特征   总被引：3，自引：3，他引：3  

陈松  许爱玉 《台湾海峡》1993,12(3):280-286

台湾海峡西部海域表层沉积物中重金属含量与未污染近岸沉积物的平均含量相当,基本上未受污染。各重金属含量具有沿东北至西南方向递减的分布趋势。沉积物中微量金属的含量明显地受Fe-Mn 氧化物和有机质的含量所控制。福建沿海主要港湾沉积物中Pb、Zn 含量偏高,微量金属含量不受Fe-Mn 氧化物和有机质控制,构成本地区沉积物的两种区域性特征。  相似文献   

台湾北部四种软珊瑚体内十八种金属累积于共肉组织与中轴骨骼的特性     

黄克莉  黄将修  黄慕也 《台湾海峡》2003,22(4):499-504

分别检测采自台湾北部和平岛沿岸海域及淡水河出海口海域的侧扁软柳珊瑚(Subergorgia suberosa)、扁刺柳珊瑚(Echinogorgia complexa)、网刺柳珊瑚(Echinogorgia reticulata)和1未定种柳珊瑚4种软珊瑚样品体内18种金属元素。比较同株珊瑚中金属累积于共内组织与中轴骨骼含量的特性．研究结果显示铜(Cu)及钒(V)于4种珊瑚中累积于中轴骨骼的量高于共内组织，Zn、Fe、Mn、Ca、Cd、Ni、Pb及Se则恰相反，Al、As、Co、Cr及Sn累积部位没有规则，Ag,Au及Ba因有ND值(未检出值)无法归纳其累积倾向，但若忽略ND值，则Ag与Ba累积于共肉组织较高，Au累积于中轴骨骼较高．此研究结果显示环境中金属倾向累积于软珊瑚共肉组织或中轴骨骼可能有一定之脉络可循．  相似文献   

海洋沉积物中多元素分析测定方法   总被引：2，自引：0，他引：2  

隆茜  张经  周菊珍  孙振斌 《海洋学研究》2002,20(3):52-56

介绍了海洋沉积物消化及多元素分析的测定方法。分析测定过程中 ,应选用国家标准溶液。标准溶液的蒸发次数、加酸量、稀释倍数等对样品测定结果的准确性均有一定影响。消化过程中 ,过多的蒸发次数对微量元素 Cr、V的测定结果有明显影响 ,蒸发的次数越多 ,元素的损失量越大 ,因此 ,为了获得更准确的测定结果 ,应尽可能减少蒸发次数 ,并减少加酸量 ;测定常量元素时 ,样品较大的稀释倍数使获得数据的可靠性增大 ,通常 0 .2 5 g样品应稀释至 5 0m L,0 .5 g样品应稀释至 1 0 0 m L。  相似文献   

Effects of metal contamination on macrobenthos of two North Sea estuaries     

Hall  John A.; Frid  Christopher L. J.; Proudfoot  Roger K. 《ICES Journal of Marine Science》1996,53(6):1014-1023

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