Zinc

Adriano, D. C.

doi:10.1007/978-1-4757-1907-9_13

Cited by 9 publications

(2 citation statements)

References 216 publications

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“…An average Zn concentration of 40 mg kg −1 was reported for non‐contaminated soils (Adriano 1986). The comparatively low mean Zn levels in the soils from the wetland control site (7.50 ± 1.62 mg kg −1 d.w. ) were considered to be well within the levels of uncontaminated soils.…”

Section: Resultsmentioning

confidence: 99%

Variations in the contents of heavy metals in arable soils of a major urban wetland inlet drainage system of Lake Victoria, Uganda

et al. 2010

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Little is known about the effects of urbanization on the chemical quality of soils in suburban wetland inlet drainage systems to the Uganda side of Lake Victoria, on which food crops are extensively grown. It is feared that pollution in the soils might eventually enter food chains through such crops being consumed by urban populations unaware of their occurrence. Soil samples were collected from cultivated areas of a major wetland drainage system (Nakivubo Channel), at Kampala, Ubanda, near Lake Victoria and from a rural control wetland site (Senge). The soil from this site had similar properties as those from the urban test site (i.e., soil texture; porosity; humus content). Analysis of heavy metals with atomic absorption spectrophotometry (AAS) yielded the following soil concentration ranges: manganese (190-780), cadmium (<0.001-1.0), zinc (6.0-10.0) and lead (10-20 mg kg )1 ) dry weight for the control site, and 450-900, 1.0-2.0, 131-185, 40-60 mg kg )1 dry weight, respectively, for the urban wetland, indicative of relatively heavy metal pollution in the suburban drainage system. Heavy metal levels in cocoyam (Colocasia Esculenta) and sugarcane (Saccharum Officinarum) grown on both wetland soils also were evaluated via AAS with a modified wet-acid-digestion technique. The results highlighted high cadium and lead levels (P £ 0.0003) in the crops from urban wetland cultivation. Cadmium and lead concentrations in cocoyam from urban wetland soils exceeded those from the control site by 0.17 and 3.54 mg kg )1 , respectively. The corresponding results for sugarcane indicated a similar increase of 0.56 and 2.14 mg kg )1 of juice extract. Cadmium and lead levels in both urban wetland crops were higher than the maximum permissible limits of the Codex Alimentarius Commission, indicating that these concentrations pose potential health risks to urban consumers, and call for early counter-measures to combat urban pollution entering the lake.

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Section: Resultsmentioning

confidence: 99%

Variations in the contents of heavy metals in arable soils of a major urban wetland inlet drainage system of Lake Victoria, Uganda

et al. 2010

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“…We measured the lowest values of Pb and Cu in the same pedon. Emissions from industrial processes from a Zn producing and old bicalcic phosphate fertilizer factories maybe responsible for the elevated concentrations of Zn and Cd in the in the study areas [20,38].…”

Section: Metals Pollution and Its Possible Sourcesmentioning

confidence: 99%

Micromorphological and Chemical Approaches to Understand Changes in Ecological Functions of Metal-Impacted Soils under Various Land Uses

Acosta

Martínez-Martínez

Faz

et al. 2011

Applied and Environmental Soil Science

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We investigated the changes in faunal activities as measures of the ecological functions of soils impacted by potentially toxic metals (PTMs) under urban, industrial, agricultural, and natural uses. Concentrations and distributions of Zn, Cd, Pb, Cu, Mn, and Fe were estimated by sequential chemical extractions, while relicts and present faunal activities were studied by micromorphological analyses. Urban and natural lands were contaminated with Pb, Cd, and Zn. Microarthropods and fungi are observed to be active in the litter decomposition in natural, agricultural and urban lands which indicates that total concentration of PTMs in soils is not a good indicator to evaluate the limitations of PTMs to fauna activity. Metals immobilization on carbonates and Fe/Mn oxides, and fertilizations reduced the negative effects of metals on faunal activity. Micromorphological analyses showed the impacts of metal on soil ecological functions in industrial site, where the surface soils are devoid of any evidence of faunal activity; likely due to high proportion of Pb and Zn in organic components. Therefore, the impacts of metals in soil fauna activities, hence ecological functions of soils, are best evaluated by the knowledge of metal partitioning on solid phases in combination with observations of fauna activities using micromorphological techniques.

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Zinc

and¹,

Eder²

2004

Elements and Their Compounds in the Environment

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Zinc

Cited by 9 publications

References 216 publications

Variations in the contents of heavy metals in arable soils of a major urban wetland inlet drainage system of Lake Victoria, Uganda

Variations in the contents of heavy metals in arable soils of a major urban wetland inlet drainage system of Lake Victoria, Uganda

Micromorphological and Chemical Approaches to Understand Changes in Ecological Functions of Metal-Impacted Soils under Various Land Uses

Zinc

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