Assessment of Heavy Metal Pollution in River Water of Hanoi, Vietnam Using Multivariate Analyses

Asian Center for Environmental Research (ACER), Meisei University, 2-1-1, Hodokubo, Hino, Tokyo 191-8506, Japan.
Bulletin of Environmental Contamination and Toxicology (Impact Factor: 1.22). 08/2009; 83(4):575-82. DOI: 10.1007/s00128-009-9815-4
Source: PubMed

ABSTRACT Concentrations of heavy metals in water of the Nhue River (a suburban/rural river) and one of its tributaries, the To Lich River (an urban river), in Hanoi, Vietnam had been monitored, and spatial and seasonal variations in their composition were evaluated by means of principal component analysis and cluster analysis. Heavy metal concentrations in water of the two rivers were generally lower than the surface water quality standard in Vietnam, except for manganese in several sites, although they were higher than the median values in freshwater of the world by 0.42-43 times in Nhue and 0.13-32 times in To Lich. The two multivariate analyses represented that the composition of heavy metals in river water of To Lich was distinctly different from that of Nhue. It was also suggested that metal concentrations and their composition in Nhue river water would be affected by inflowing water of To Lich and wastewater discharged from the up- and middle-stream basin, and that they gradually recovered along the direction of water flow in the downstream area in rainy season.

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    • "Water quality indices are tools, to determine conditions of water quality and, like any other tool, require knowledge about principles and basic concepts of water and related issues (Nikbakht 2004). Several researchers have used water quality indices methods for the assessing quality of waters (Zhang et al. 2009; Kikuchi et al. 2009; Pandey et al. 2009; Giri et al. 2010; Virha et al. 2011; Srivastava et al. 2011; Kumar et al. 2012; Prasanna et al. 2012; Díaz et al. 2013; Giri and Singh 2014; Mahato et al. 2014; Protano et al. 2014; Tiwari et al. 2014; Varghese and Jaya 2014; Panigrahy et al. 2015). However, in recent years much attention has been given towards the evaluation of heavy metal pollution in ground and surface water with the development of a heavy metal pollution index (HPI) (Reddy 1995; Mohan et al. 1996). "
    Current World Environment 12/2014; 9(3):843-850. DOI:10.12944/CWE.9.3.35
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    ABSTRACT: Daqing Wetland was contaminated by heavy metals for holding lots of industrial and domestic waste water. Due to their high stability and non-degradation, heavy metals are possible to gather in human body through the food chain and then threaten health. Water samples were collected from Longfeng Wetland and lake marshes in the vicinity of Daqing City. The contents of heavy metals (Cd, Pb, Cr, Cu, Zn, Ni) were determined, and the contamination degrees were evaluated simultaneously. The results indicate that heavy metals of Zn, Ni, Cd, Cr and Pd have contaminated the Longfeng Wetland severely. In addition the concentrations of Cr and Cd in some lakes around oil wells are excessively high, and have overrun the grade V based on the threshold values of surface water given by the National Environmental Protection Agency of China. Some measures have to be taken to tackle heavy metal contamination of Longfeng Wetland and lake marshes in Daqing City. KeywordsDaqing City-wetland-heavy metal-contamination-evaluation
    Journal of Shanghai University (English Edition) 08/2010; 14(4):262-265. DOI:10.1007/s11741-010-0641-2
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    12/2010; 2:1344-1354. DOI:10.1016/j.proenv.2010.10.145
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