Heavy metal content in urban soils as an indicator of anthropogenic and natural influences on landscape of Karachi—A multivariate spatio-temporal analysis

Karim, Zahida; Qureshi, Bilal Aslam; Mumtaz, Majid; Qureshi, Salman

doi:10.1016/j.ecolind.2013.07.020

Cited by 162 publications

(83 citation statements)

References 35 publications

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“…Assessment of arsenic and heavy metal using I geo Every soil that was sampled contained natural heavy metals at background concentrations (Raj and Jayaprakash 2008;Karim et al 2013;Chandra et al 2013). Based on the soil background value, the possible enrichment of As and heavy metals in wetland soils was evaluated and is presented using geoaccumulation indices (I geo ) in Fig.…”

Section: Initial Eigenvaluesmentioning

confidence: 99%

“…1 Heavy metal contamination in estuarine and coastal areas has expanded in China because of the potential ecological effects and because of public concern for seafood safety in association with these metals (Feng et al 2011;Pan and Wang 2012;Yang et al 2012;Hu et al 2013b). Many previous studies have reported that heavy metal contamination has occurred in river basins or estuaries due to the cause-effect relationship between human effects and the soil quality (Xiao et al 2011;Karim et al 2013). Therefore, it is necessary to investigate distributions and the extent of heavy metal pollution in coastal wetlands and to provide scientific suggestions for coastal management (Chatterjee et al 2009;Liu et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Contamination assessment of arsenic and heavy metals in a typical abandoned estuary wetland—a case study of the Yellow River Delta Natural Reserve

Xie

Sun

Zhang

et al. 2014

Environ Monit Assess

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Coastal and estuarine areas are often polluted by heavy metals that result from industrial production and agricultural activities. In this study, we investigated the concentration trait and vertical pattern of trace elements, such as As, Cd, Ni, Zn, Pb, Cu, and Cr, and the relationship between those trace elements and the soil properties in coastal wetlands using 28 profiles that were surveyed across the Diaokouhe Nature Reserve (DKHNR). The goal of this study is to investigate profile distribution characteristics of heavy metals in different wetland types and their variations with the soil depth to assess heavy metal pollution using pollution indices and to identify the pollution sources using multivariate analysis and sediment quality guidelines. Principal component analysis, cluster analysis, and pollution level indices were applied to evaluate the contamination conditions due to wetland degradation. The findings indicated that the concentration of trace elements decreased with the soil depth, while Cd increases with soil depth. The As concentrations in reed swamps and Suaeda heteroptera surface layers were slightly higher than those in other land use types. All six heavy metals, i.e., Ni, Cu, As, Zn, Cr, and Pb, were strongly associated with PC1 (positive loading) and could reflect the contribution of natural geological sources of metals into the coastal sediments. PC2 is highly associated with Cd and could represent anthropogenic sources of metal pollution. Most of the heavy metals exhibited significant positive correlations with total concentrations; however, no significant correlations were observed between them and the soil salt and soil organic carbon. Soil organic carbon exhibited a positive linear relationship with Cu, Pb, and Zn in the first soil layer (0-20 cm); As, Cr, Cu, Ni, Pb, and Zn in the second layer (20-40 cm); and As, Cr, Cu, Ni, Pb, and Zn in the third layer (40-60 cm). Soil organic carbon exhibited only a negative correlation with Cd (P<0.05), in the second and third layers. As, Cr, Cu, Ni, Pb, and Zn exhibited lower geoaccumulation index values (I geo values), which averaged less than 0 in the three soil layers, this finding indicates that the soils have remained unpolluted by these heavy metals. The mean concentrations of these trace elements were lower than Class I criteria. The degradation wetland restoration suggestions have also been provided in such a way as to restore the reserved flow path of the Yellow River. The results that are associated with trace element contamination would be helpful in providing scientific directions to restore wetlands across the world.

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Section: Initial Eigenvaluesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Contamination assessment of arsenic and heavy metals in a typical abandoned estuary wetland—a case study of the Yellow River Delta Natural Reserve

Xie

Sun

Zhang

et al. 2014

Environ Monit Assess

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“…Exposure to contaminated soils may pose a health risk, especially for children because of the additional soil-hand-mouth pathway (Ljung et al, 2006). Recently, a lot of studies have been focused on urban soil pollution (Karim et al, 2014;Luo et al, 2012;Yang and Zhang, 2015). The standard analytical approach is not appropriate for evaluation of health risk of complex mixtures like soil -bioassays are useful in such studies (Soodan et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Cytotoxicity and Genotoxicity of Soil in Shumen City Park

Koynova

Koleva

Dragoeva

et al. 2017

CBUP

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Abstract:Sedentary lifestyle has become a great concern to human health. City parks play a great role in the solution of this problem, but exposure to urban pollutants leads to the necessity to monitor environmental quality. Purpose of Study The aim of the study was to evaluate the possible cytotoxicity and genotoxicity of soil samples collected from Shumen city park using Allium cepa L.-test. Methods The following microscopic parameters were used: mitotic index, index of each phase of mitotic division, mitotic abnormalities and interphase cells with micronuclei or two nuclei. Findings and Results The decline of the mitotic activity and changes in the proportion of mitotic phases indicate soil cytotoxicity. Various mitotic abnormalities and binucleated cells revealed genotoxicity. Conclusions and Recommendations Established cytotoxicity and genotoxicity of soil revealed a potential health risk to park users. Further analyses should be provided, since positive results from Allium-test serve as an alarm.UDC Classification: 502/504; DOI: http://dx

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“…Many studies have shown increasing concentrations of heavy metals in soils of industrial and urban areas due to industrial activities and use of fossil fuels (Wu et al 2011;Yaylal and Yaylalı-Abanuz 2011;Xia et al 2011;Li et al 2013;Szolnoki et al 2013;Karim et al 2014). Soils contaminated with heavy metals pose serious health risks to inhabitants, especially in urban soils, which can easily enter their body through ingestion, inhalation or dermal routes (Xia et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of soil heavy metals in different land uses of an industrial area of Tehran (Iran)

Mahmoudabadi

Sarmadian

Moghaddam

2015

Int. J. Environ. Sci. Technol.

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Vegetation and different land uses may affect the spatial distribution of heavy metals in soils. The objective of the current article was to study the impact of industrial activities and land use type on the distribution of heavy metals in soils of Chitgar Forrest Park, located in industrial zone in the west of Tehran City. The soil samples were taken from 116 sites in a regular sampling grid (250 9 250 m) at a depth of 0-20 cm, including three different land uses, needle leaf forests, broadleaf forests and rangeland. Nitric acid-extractable form of seven metals, Cu, Cd, Fe, Mn, Ni, Pb and Zn, and DTPA-extractable form of Cu, Fe, Mn and Zn were measured. Soil texture, pH, organic carbon, carbon-to-nitrogen ratio, percentage of calcium carbonate and electrical conductivity (EC) were also determined. According to the maps and background amounts, heavy metals were affected by industrial activities and road traffic. Proximity to heavy traffic highway of Tehran-Karaj and large autoindustry plants can be considered for increasing metal concentrations. Results of statistical methods (coefficient variation and cluster analysis), besides geostatistical analysis (variogram and map), showed that total concentrations of heavy metals are controlled by intrinsic and extrinsic factors in the studied area. Although land use type did not affect the alteration in the distribution of total concentrations of heavy metals, it changed the distribution of DTPA form of heavy metals in the soils through affecting the soil organic matter.

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Heavy metal content in urban soils as an indicator of anthropogenic and natural influences on landscape of Karachi—A multivariate spatio-temporal analysis

Cited by 162 publications

References 35 publications

Contamination assessment of arsenic and heavy metals in a typical abandoned estuary wetland—a case study of the Yellow River Delta Natural Reserve

Contamination assessment of arsenic and heavy metals in a typical abandoned estuary wetland—a case study of the Yellow River Delta Natural Reserve

Cytotoxicity and Genotoxicity of Soil in Shumen City Park

Spatial distribution of soil heavy metals in different land uses of an industrial area of Tehran (Iran)

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