Fractionation, Characterization and Speciation of Heavy Metals in Composts and Compost‐Amended Soils

Iwegbue, Chukwujindu M. A.; Emuh, F.N.; Isirimah, N. O.; Egun, A. C.

doi:10.1002/chin.200748228

Cited by 34 publications

(52 citation statements)

References 37 publications

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“…Excessive accumulation of heavy metals in soil and other media may eventually contaminate both the human and animal food chain (Iwegbue et al, 2007). Heavy metals can affect the growth, morphology and metabolism of soil microorganisms and consequently lose soil fertility (Bragato et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Bioavailability and leachability of heavy metals during water hyacinth composting

Singh

Kalamdhad

2013

Chemical Speciation & Bioavailability

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The bioavailability and leachability of heavy metals is important role when considering their toxicity during composting following land application. Therefore, studies were carried out on Zn, Cu, Mn, Fe, Ni, Pb, Cd and Cr during 30 days agitatedpile composting of water hyacinth (Eichhornia crassipes). This study investigated the influence of parameters such as pH, temperature and organic matter content on the distribution of heavy metal bioavailability and leachability during composting of water hyacinth. Results showed that the contents of total metal concentration increased during the composting process. The bioavailability of heavy metals was investigated in the form of water soluble and diethylene triamine pentaacetic acid (DTPA) extractable. In the water soluble, DTPA and leachable Zn, Cu, Mn, Ni and Cr reduced but there was a gradual increase in the Fe concentration during the composting process. Furthermore, in water soluble and leachable Ni, Cd and Pb were not detected and in DTPA extractable Cd and Pb were also not detected during 30 days of composting.

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Section: Introductionmentioning

confidence: 99%

Bioavailability and leachability of heavy metals during water hyacinth composting

Singh

Kalamdhad

2013

Chemical Speciation & Bioavailability

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“…The proportion of F1 and F3 were relatively low with the range of 3.24% to 4.79% and 2.35% to 3.73%, respectively. Low proportion of F1 attributed to the capability of Zn to be easily adsorbed and assimilated by other organisms [24]. Similar to Zn, the majority of Cr was in F4 (93.24% to 96.16%), followed with F3 1.69% to 3.12%, F2 1.25% to 2.0%, and F1 0.11% to 0.16%, respectively.…”

Section: Resultsmentioning

confidence: 97%

Distribution, Speciation and Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Sanmen Bay in ZheJiang

Hu¹,

Zhao²,

Liu³

et al. 2017

Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)

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Abstract. This Surface sediment samples were collected from Sanmen Bay in Zhejiang. The distribution of total concentration of five heavy metals (Zinc, Chromium, Cadmium, Copper, and Lead) was determined, and their speciation using BCR sequential extraction procedure was investigated. The pollution level and ecological hazard of these heavy metals were evaluated Potential Ecological Risk Index (Er i ). The distribution of five metals showed that the total concentrations in inner bay were higher than those in out of bay. The results of metal speciation in surface sediment show that the residual fraction of four metal except for Pb predominated, of which Zn account for 79.20%~84.25%, Cr 93.24%~96.16%, Cd 34.71%~57.58%, and Cu 66.06%~79.51%, respectively. The dominate fraction of Pb is the part bounded to amorphous Fe and Mn oxides and hydroxides, which accounts for 58.17%~72.7%. The evaluation results indicate that Cd is the primary element with slight ecological risk in the area according to the potential ecological risk index (Er i ).

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“…(KASHEM et al, 2007). O extrator DTPA extrai por reação de complexação os metais ligados à fração matéria orgânica de acordo a constante de estabilidade do complexo (IWEGBUE et al, 2007).…”

Section: Methodsunclassified

Bioavailability of lead using chemical extractants in soil treated with humic acids and activated carbon

Santos

Accioly

Nascimento

et al. 2015

Revista Ciência Agronômica

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-Soil contamination by lead in the town of Santo Amaro, in the state of Bahia, Brazil, originated with the installation of a metal plant in the city in the 1960s, and poses a serious risk to the local population. Determination of the available Pb levels in the soil is an important tool in monitoring the risks of this contamination. However, different methods are used to determine the available Pb content of the soil, resulting in differing values for the extractants. The aim of the present work was to compare the efficiency of extraction using Mehlich 1, DTPA and CaCl 2 solutions in the evaluation of Pb availability in soil treated with different soil amendments. The soil sample used in the experiment was collected near the metal plant. The dosages of soil amendments were set up based on the carbon content of the materials (compost humic acid, commercial humic acid and charcoal), being: 0, 0.75, 1.5, 3 and 7.5 g C kg -1 . The available Pb content was extracted by Mehlich 1, DTPA pH 7.3 and CaCl 2 10 mmol L -1 . Soil fractionation was carried out to determine the metal attached to the exchangeable and organic matter fractions of the soil. The addition of AHv reduced the Pb content of the soil by 60, 89 and 47% for extractions carried out with Mehlich 1, CaCl 2 and DTPA respectively. The Pb content of the organic matter fraction was directly proportional to the dosages of soil amendments. The three extractants under evaluation were efficient in predicting the available Pb content.

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Fractionation, Characterization and Speciation of Heavy Metals in Composts and Compost‐Amended Soils

Abstract: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Cited by 34 publications

References 37 publications

Bioavailability and leachability of heavy metals during water hyacinth composting

Bioavailability and leachability of heavy metals during water hyacinth composting

Distribution, Speciation and Ecological Risk Assessment of Heavy Metals in the Surface Sediments of Sanmen Bay in ZheJiang

Bioavailability of lead using chemical extractants in soil treated with humic acids and activated carbon

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