Spatial variations in heavy metals on tidal flats in the Yangtze Estuary, China

Gorenc, S.; Kostaschuk, Ray; Chen, Zuoqi

doi:10.1007/s00254-004-0968-5

Cited by 34 publications

(20 citation statements)

References 14 publications

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“…During decomposition, the Cd component is leached into the surrounding soil and over time gets accumulated in the soil. Cadmium is extremely toxic and the primary use of soil high in Cd in form of manure for the cultivation of vegetables and other food crops could cause adverse health effect to consumers such as renal disease and cancer (Che et al, 2003;Gorenc et al, 2004). Moreover, when ingested by humans, cadmium accumulates in the intestine, liver and kidney and chronic exposure of Cd causes proximal tubular disease and osteomalacia (Pascual et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Heavy Metal in Soils From Enyimba Dumpsite in Aba, Southeastern Nigeria Using Contamination Factor and Geo-Accumulation Index

Akobundu¹,

Nwankwoala²

2013

EER

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The manner in which municipal wastes generated are disposed in most urban areas in Nigeria is worrisome. The upsurge in population density and its resultant increase in urbanization and industrialization and the amount of waste generated in Aba, are of great concern. The objective of this research is to evaluate the concentration of some heavy metals in soils in the vicinity of Enyimba dumpsite in Aba, Nigeria. Thirty soil samples were collected and analyzed in the laboratory for some heavy metals by atomic absorption spectrophotometric method and multivariate statistical techniques. Twenty-five of the samples were obtained from the vicinity of the dumpsite while five samples are collected far away from the dumpsite to serve as control samples. The overall decreasing metal concentration in the dumpsite soil is: Cd > Co > Cu > Zn > As > Pb > Mn > Ni > Cr. A positive correlation exists between Cd and organic matter (r = 0.598). Geo-accumulation index and contamination factor showed a moderate contaminated with Cd only while the other metals are in their uncontaminated level. Factor analysis revealed four major components accounting for 78.82% of cumulative variance of the contamination: Cd, Cu, Co and organic matter; Pb, Zn and pH; Mn, As, clay + silt and finally Cr and Ni. From the above observations, it is evident that only Cd showed more pronounced level of pollution than any other metal. The need to replace open dumpsites with well designed sanitary landfills is advocated.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Heavy Metal in Soils From Enyimba Dumpsite in Aba, Southeastern Nigeria Using Contamination Factor and Geo-Accumulation Index

Akobundu¹,

Nwankwoala²

2013

EER

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“…However, copper was classified high based on Wedepohl, (1995) and Taylor and McLennan (1995) classification model ( All the values are above the specifications of 0.102 ppm of Wedepohl (1995) and 0.098 ppm given by Taylor and Mclenna (1995). Cadmium is extremely toxic and the primary use of soil high in cadmium in form of manure for the cultivation of vegetables and other food crops could cause adverse health effect to consumers such as renal disease and cancer (Gorenc et al, 2004). The concentration map of cadmium in the study area ( Figure 3) revealed that the concentration of cadmium decreases away from the mining sites, which is an indication that anthropogenic activities in the area is responsible for high cadmium concentration in soils in the area.…”

Section: Classification By Wedepohl (1995) and Taylor And Mclennan (mentioning

confidence: 92%

Utility of pollution indices in assessment of soil quality around Madaga gold mining site, Niger state, North-central Nigeria

Amadi¹,

Ebieme²,

Musa³

et al. 2017

Ife Journal of Science

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The quality of soil in the vicinity of Madaka mining sites were investigated in this study using Environmental Pollution Indices. Geological mapping of the study area indicated that the area was dominated by schist and granite. The static water level measurement revealed a westward groundwater flow direction which also coincides with the regional structural trend of the area. Laboratory analyses of soil and stream sediment were carried out in National Geosciences Research Laboratory Kaduna. The results of the soil analyses revealed high concentrations of mercury, cadmium, lead and arsenic. The results of the laboratory analysis were further elucidated using pollution indices such as geo-accumulation index, contamination factor, degree of contamination, elemental contamination index and metal pollution index. These environmental indices revealed that the soil is seriously polluted with mercury, cadmium and lead, moderately polluted with arsenic, lightly polluted with iron and copper and very lightly polluted with manganese, zinc, nickel and cobalt in the order of: Hg > Cd >Pb> As > Fe > Cu > Mn > Zn > Ni > Co. The mean concentrations of the first four metals (Hg, Cd, Pb and As) exceeds their average crustal abundance, which is an indication of possible pollution. The concentrations map of the analyzed heavy metals indicated a westward decrease in concentration away from the mine sites. This was in agreement with the flow direction and the possible reduction in pollution intensity away from the mine sites could be attributed to the natural attenuation mechanism of soil in the course of groundwater migration as well as hydrogeological attributes of the area. The study recommends that the miners be grouped into association and trained on modern mining techniques that are environmental friendly. The polluted soils in the area should be remediated and proper sensitization on the dangers associated with artisanal mining should be carried out in the area. Periodic monitoring of the soil quality in the area is advocated. Keywords

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“…It is necessary to master the status and characteristics of heavy metal pollution in this region. Over the last two decades, much investigation regarding heavy metals in the Yangtze River estuary has been carried out (Yang 1999;Chen et al 2001;Gorenc et al 2004;Chen et al 2004;Wu et al 1996;Zhang et al 2001). However, few of them studied on the spatial and temporal variation of heavy metals.…”

Section: Introductionmentioning

confidence: 98%

Assessment of dissolved heavy metal in the Yangtze River estuary and its adjacent sea, China

Wang

et al. 2009

Environ Monit Assess

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The purpose of this paper is to determine the concentrations of dissolved heavy metals namely mercury (Hg), lead (Pb), cadmium (Cd), and copper (Cu) and to investigate the relationships between nutrients (nitrate-nitrogen and phosphate) and dissolved heavy metals. For this purpose, the concentrations of dissolved heavy metals were measured through 51 voyages form 1984 to 2006 in the Yangtze river estuary and its adjacent sea. Results analysis showed that dissolved heavy metals were not the main pollutants in the Yangtze river estuary, and the main source of heavy metal contamination was industrial wastewater from terrestrial pollution during the past 20 years. Heavy metal values showed significant abundance in the south branch of the Yangtze River estuary and Hangzhou Bay. In addition, Pb showed negative correlation with nutrients, while the positive correlations between Hg, Cd, and nutrients were shown. The obtained molar ratios, DeltaCd/DeltaN = 1.68 x 10(-5) and DeltaCd/DeltaP = 1.66 x 10(-4), are close to those in plankton, showing the biogeochemical behavior and process of dissolved cadmium.

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Spatial variations in heavy metals on tidal flats in the Yangtze Estuary, China

Cited by 34 publications

References 14 publications

Evaluation of Heavy Metal in Soils From Enyimba Dumpsite in Aba, Southeastern Nigeria Using Contamination Factor and Geo-Accumulation Index

Evaluation of Heavy Metal in Soils From Enyimba Dumpsite in Aba, Southeastern Nigeria Using Contamination Factor and Geo-Accumulation Index

Utility of pollution indices in assessment of soil quality around Madaga gold mining site, Niger state, North-central Nigeria

Assessment of dissolved heavy metal in the Yangtze River estuary and its adjacent sea, China

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