Department of Marine Science, University of Calcutta, 35. B.C. Road, Kolkata, 700 019, India.
Environ Monit Assess. 2012 Apr;184(4):2219-30. doi: 10.1007/s10661-011-2111-x. Epub 2011 Jun 10.
Heavy metals are dangerous to aquatic organisms and it can be bioaccumulated in the food chain leading to diseases in human. Cumulative effects of metals or chronic poisoning may occur as a result of long-term exposure even to low concentrations. The accumulation of heavy metals varies depending upon the species, environmental conditions, and inhibitory processes. Concentrations of zinc, copper, lead, and cadmium were determined in finfish and shellfish species in the Gangetic delta using a PerkinElmer Sciex ELAN 5000 ICP mass spectrometer and expressed as milligrams per kilogram of dry weight. In finfish and shellfish species the concentrations of Zn, Cu, Pb, and Cd were comparatively higher at stations 1 and 2 than the permissible level of WHO. The concentration of metals exhibited significant spatial variation and followed the order station 1 > station 2 > station 3 > station 4, which may be related to different degree of contamination in different location. The metal accumulation exhibited species specificity.
重金属对水生生物有害，它可以在食物链中生物累积，导致人类疾病。即使长期暴露于低浓度下，也可能会发生金属的累积效应或慢性中毒。重金属的积累取决于物种、环境条件和抑制过程。本研究使用 PerkinElmer Sciex ELAN 5000 ICP 质谱仪，在恒河三角洲的鱼类和贝类物种中测定了锌、铜、铅和镉的浓度，并以每干重毫克表示。在鱼类和贝类物种中，Zn、Cu、Pb 和 Cd 的浓度在 1 号站和 2 号站比世界卫生组织规定的容许水平要高。金属浓度表现出显著的空间变化，遵循以下顺序：1 号站>2 号站>3 号站>4 号站，这可能与不同地点的不同污染程度有关。金属积累表现出物种特异性。
