Speciation and Removal of Zinc from Composted Municipal Solid Wastes

Korolewicz, Teofil; Turek, Marian; Ciba, Jerzy; Cebula, Jan

doi:10.1021/es001441l

Cited by 15 publications

(2 citation statements)

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“…3,4 More recently, these procedures have been applied to compost. [5][6][7][8] It has also been shown that this timeconsuming process can be speeded up substantially if an ultrasonically accelerated version of sequential extraction is utilized. 9 Using this rapid method it was found that elements such as Zn, Mn and As had a high potential mobility in compost, whereas other elements such as Pb, Cu, Fe, and Cr exist mainly in immobilized forms.…”

Section: Introductionmentioning

confidence: 99%

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A study of the elemental leachability and retention capability of compost

Song

Greenway

2004

J. Environ. Monitor.

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In this work a comparison is made between the different approaches that can be taken to evaluate the mobility of elements in compost. The practical consequences of the results obtained are also discussed in terms of methods for cleaning up compost and using compost in environmental remediation. The mobility of potentially toxic elements in compost is evaluated by leaching with four selected eluents, i.e. diluted sulfuric acid, oxalate, citrate and EDTA. In contrast to the chelating agents, diluted sulfuric acid was found to generally have a low leaching capability for removal of heavy metals from compost. This implies that the risk of heavy metal leaching caused by natural rainfall is likely to be low. The results obtained in the leaching experiment were compared with previous results obtained from sequential fractionation. This comparison confirmed that both methods gave similar results for predicting the lability of elements in compost. A non-linear regression analysis of the leaching curves was also conducted. The leaching curves for elements with high lability could be fitted with a two components model. The labile components identified by the kinetic model are approximately in accordance with the fractions obtained from the first step of the sequential extraction method. The kinetic speciation method is shown to be a relatively rapid and simple procedure for compost which gives more information about element lability than simple leaching experiments. The leaching reagents used in this work were not effective enough to be used for cleaning up compost with a high metal content. Compost was however shown to have a high affinity for heavy metals, with the order of affinity of metal for the compost being very similar to that seen for humic acid. Compost may therefore prove to be a good remediation material for metal contaminated waste.

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Section: Introductionmentioning

confidence: 99%

“…15 Compost may therefore have to be cleaned up before application to land or even before the composting process has been carried out. 7 One way to clean up the compost is to use a flushing technique with leaching reagents. This approach has been more frequently investigated for cleaning heavy metal contaminated soil.…”

Section: Introductionmentioning

confidence: 99%