Lead forms in urban turfgrass and forest soils as related to organic matter content and pH

Yesilonis, Ian D.; James, Bruce R.; Pouyat, Richard V.; Momen, Bahram

doi:10.1007/s10661-007-0040-5

Cited by 17 publications

(12 citation statements)

References 45 publications

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“…While not statistically significant, elevated Pb contents in vacant/agriculture (101 mg/kg) compared with other land uses (34–52 mg/kg) could be due to vehicular traffic, previous industrial activities, the residues of lead‐based paints (Imperato et al. , 2003) or low pH and Ca levels in these areas (Yesilonis et al. , 2008).…”

Section: Resultsmentioning

confidence: 99%

Anthropogenic effects on the physical and chemical properties of subtropical coastal urban soils

Hagan

Dobbs

Timilsina

et al. 2011

Soil Use and Management

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We investigated the effects of various anthropogenic factors on urban soil properties in subtropical, coastal Tampa, FL, USA. Specifically, we explored the influence of (i) urbanization as measured by land use, land cover, population density and years since urban development and (ii) socioeconomic conditions as reflected in household income and property values on bulk density (BD) and several key soil chemical properties. Results indicate that Tampa’s urban soils were affected to varying degrees by these factors with chemical properties being more variable than BD. Across land uses significant differences were found for Mehlich‐1 (M1) extractable P, Ca and Na. A similar trend was observed for land‐cover classes, although significant differences were also found for pH and M1‐Cu. Soil properties had no statistically significant relationship with population density. However, time since urbanization did with M1‐P and Na varying significantly across age categories. For our socioeconomic analyses, M1‐K and Mg levels differed significantly by household income while pH, P, Ca and Na values differed significantly by property value. Overall, our findings indicate that despite their inherent heterogeneity, there are identifiable patterns among subtropical coastal urban soil properties. We suggest that a more thorough understanding of these patterns and their drivers is an essential first step towards developing soil management strategies aimed at maintaining environmental quality and ecosystem services in subtropical cities.

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Section: Resultsmentioning

confidence: 99%

Anthropogenic effects on the physical and chemical properties of subtropical coastal urban soils

Hagan

Dobbs

Timilsina

et al. 2011

Soil Use and Management

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“…Sequential fractionation studies conducted by Elsokkary et al [26] in highly contaminated alkaline Nile Delta soils of Egypt indicated that most of the Pb accumulated in the organic matter as sulfide fraction and attributed this phenomenon was mainly due to high affinity of Pb towards organic matter. Recent study conducted by Yesilonis et al [27] in soils under turf grass and forested lands of Baltimore county in Maryland indicated that most of the Pb (60-70% of total Pb) under turf grass soil bound to Mn-Fe oxide fraction, which in turn controlled by pH of the surface soils.…”

Section: Leadmentioning

confidence: 98%

“…It is generally reported by researchers that the availability of trace elements in soils mainly controlled by the organic matter content and pH. [22][23][24][25][26][27][28] Addition of WWTS increases the soil organic mater content which in-turn increases the soil CEC, a factor that may affect the levels of labile fraction (both soluble and exchangeable) of trace elements. [23] Copper generally reacts with organic matter by forming stable coordination complexes rather than by hydrogen bonding or electrostatic attraction because of its low hydration energy and low charge.…”

Section: Coppermentioning

confidence: 99%

Chemical fractionation of Cu, Zn, Cd, Cr, and Pb in sewage sludge amended soils at the end of 65-d sorghum-sudan grass growth

Paramasivam

Lettimore

Alva³

et al. 2014

Journal of Environmental Science and Health, Part A

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Heavy metals are potentially toxic to human life and the environment. Metal toxicity depends on chemical associations in soil. Understanding the chemical association of trace elements in soils amended with biosolids is very important since it determines their availability within rhizosphere and mobility beyond the rhizosphere. A sequential extraction method was used to determine the various chemical associations [labile (exchangeable + sorbed), organic, carbonates, and sulfides] of Cu, Zn, Cd, Cr, and Pb at the end of sorghum-sudan grass growth (65d) in Candler fine sand (pH = 6.8) and in Ogeechee loamy sand (pH = 5.2) amended with wastewater treatment sludge (WWTS) obtained from two different sources at application rates of 0, 24.7, 49.4, 98.8, and 148.2 Mg ha(-1). Results of this study indicated that irrespective of the soil type, Cu, Cd, Cr, and Pb in the labile fractions (exchangeable + sorbed) were in the range of 0-3.0 mg kg(-1) and the amount for Zn was in the range of 0.2-6.6 mg kg(-1). Therefore, their availability to plants and mobility beyond rhizosphere would be substantially low unless further transformations occur from other fractions. Results also indicated that the presence of substantial amounts of trace elements studied were in sulfide (HNO3) fraction and in organic (NaOH) fraction irrespective of soil type with the exception of Pb which was mainly present as carbonate (Na2EDTA) fraction and the remaining Pb equally as sulfide (HNO3) and organic (NaOH) fractions. Furthermore, results indicated that Cd was mainly present as carbonate (Na2EDTA) fraction. Irrespective of soil type, source and rate of WWTS application, summation of quantities of various fractions of all the trace elements studied through sequential extraction procedure were 1 to 25 % lower than that of total recoverable quantities of these trace elements determined on acid digestion described by US EPA method 3050 B. It was further evident that growing sorghum sudan grass for 65-d following the application of WWTS either depleted labile fractions or shifted the solid phases containing the trace elements in soils away from those extractable with more severe reagents, such as 4M HNO3 to those extractable with milder reagents such as dilute NaOH and Na2EDTA.

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“…All of these reactions are regulated by organic matter concentrations, pH, cation exchange capacity (CEC), and sesqui (hydr) oxide contents. However, the fixation of Pb by any of the soil is regulated by the master variable, pH (Yesilonis et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Lead availability in soils from Portugal’s Centre Region with special reference to bioaccessibility

Patinha

Reis

Dias

et al. 2011

Environ Geochem Health

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Previous environmental biomonitoring studies indicated higher environmental lead (Pb) pollution levels at the districts of Aveiro and Leiria (Portugal). In evaluating the risk for human health, which is associated with contaminated soils after oral uptake, total soil concentrations have generally been held against criteria established from toxicological studies based upon the assumption that the uptake of the contaminant is similar in the toxicological studies and from the soils assessed. This assumption is not always valid, as most toxicological studies are carried out with soluble forms of the contaminants, whereas many soil contaminants are or become embedded in the soil matrix and thus exhibit limited availability. This study intends to estimate the soluble fraction of Pb in the soils from central Portugal, and to assess the bioaccessibility of Pb and, hence, infer exposure and risk for human health. Yet, as the physical-chemical properties of the soil exert some control over the solubility of Pb in the surface environment, the relation between such soil properties and the estimated soluble and/or bioaccessible fractions of Pb is also investigated. Other objective, with a more practical nature, was to give some contribution to find a suitable in vitro mimetic of the gastrointestinal tract environment. The results indicate relatively low total metal concentrations in the soils, even if differences between regions were observed. The Aveiro district has the higher total Pb concentration and the metal is in more soluble forms, that is, geoavailable. Soils with higher concentrations of soluble Pb show higher estimates of bioaccessible Pb. Soil pH seems to influence human bioaccessibility of Pb.

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Lead forms in urban turfgrass and forest soils as related to organic matter content and pH

Cited by 17 publications

References 45 publications

Anthropogenic effects on the physical and chemical properties of subtropical coastal urban soils

Anthropogenic effects on the physical and chemical properties of subtropical coastal urban soils

Chemical fractionation of Cu, Zn, Cd, Cr, and Pb in sewage sludge amended soils at the end of 65-d sorghum-sudan grass growth

Lead availability in soils from Portugal’s Centre Region with special reference to bioaccessibility

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