Toxic organic substances in sewage sludges: A case study of Soil‐Plant transfer<sup>†</sup>

Wegmann, M.; Daniel, Rosalie; Häni, H.; Iannone, Antonio

doi:10.1080/02772248709357212

Cited by 5 publications

(3 citation statements)

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“…Quantitative pathways analyses show that if sludge is applied to arable land, there is very little likelihood that persistent organic contaminants will enter the food chain via crop uptake ( − ). A more important pathway is if sludge is applied to pasture land ( − ).…”

Section: Introductionmentioning

confidence: 99%

“…The concentration of chemical remaining on the vegetation over time potentially supplies terrestrial food chains, such as the pasture grass f grazing livestock f human pathway. Hence, several studies have sought to provide understanding of the processes that influence plant concentrations, focusing on the airplant (1-6) and soil-plant (1,(7)(8)(9)(10) transfer routes of persistent, semivolatile, and bioaccumulative compounds. These have generally shown that air-plant transfer via dry gaseous, particulate, and wet deposition dominates the supply of semivolatile organic contaminants (SOCs) (such as PCBs, PCDD/Fs, and PAHs) to the above-ground portions of plants.…”

Section: Introductionmentioning

confidence: 99%

“…These have generally shown that air-plant transfer via dry gaseous, particulate, and wet deposition dominates the supply of semivolatile organic contaminants (SOCs) (such as PCBs, PCDD/Fs, and PAHs) to the above-ground portions of plants. Root uptake from soil and translocation of such hydrophobic compounds are usually inefficient processes (1,(8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

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Behavior of Sewage Sludge-Derived PAHs on Pasture

Smith

Green

Thomas

et al. 2001

Environ. Sci. Technol.

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A field experiment was set up to investigate the retention of PAHs by pasture grass following sludge application. In addition to information on compound-specific loss rates, the influence of meteorological variables and sludge-pasture contact time on the weathering process were investigated. The rates of loss were compound specific with half-lives ranging from < 1 to 10 d. The lighter PAHs were rapidly lost from the grass surface primarily by volatilization. For the intermediate and heavier PAHs, loss was slower with rain playing an important role in the weathering process. Growth dilution was also important in reducing the contaminant levels in the grass. The effect of sludge-pasture contact time prior to weathering by rain on the residual levels remains unclear. In terms of risk of exposure, there is the potential for persistent organic contaminants to be introduced into the grazing animal food chain if sewage sludge is applied to pasture land.

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