Extractable Fractions of Metals in Sewage Sludges from Five Typical Urban Wastewater Treatment Plants of China

Chao, Wang; Li, Xiaochen; Wang, Peifang; Zou, Li-Min; Ma, Haitao

doi:10.1016/s1002-0160(06)60111-2

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…However, other heavy metals were mostly released in the first three fractions of the applied fractionation scheme. The same results were obtained by other authors for the fractionation of these heavy metals in different sewage sludge materials (LIU and SUN, 2013, Jamali et al, 2009, Wang et al, 2006, Amir et al, 2005, Fuentes et al, 2004, Merrington et al, 2003and Scanar et al, 2000. …”

Section: Fractionation Of Heavy Metals and Plant Nutrients In Sewage supporting

confidence: 84%

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Characterization Changes of Heavy Metals Contents and Fractions in Sewage Sludge from Sirt Wastewater Treatment Plant, Libya

2014

Egypt.J. Soil Sci.

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ONITORING changes of the main chemical properties of sewage sludge from Sirt Wastewater Treatment Plant, Libya was investigated. Ten random sewage sludge samples were monthly collected for a time span of one year. Average year values of TDS, pH, organic matter and C/N recorded 1428.91 mg kg -1 , 6.90, 76.3% and 7.97, respectively. Total N, P and K contents were in the normal range (5.63, 1.41 and0.019%, respectively). The total concentrations of Fe, Zn and Mn recorded high levels (2768, 1142 and 169 mg kg -1 , respectively). Low and more fluctuated total concentrations of Cu, Pb and Ni were recorded (107, 45 and 35 mg kg -1 , respectively). In general, the total concentrations of heavy metals were found to be far below the US-EPA ceiling limits except Cd and As which had concentrations at or very close to their ceiling limits. The BCR sequential extraction scheme was applied to investigate the fractionation of heavy metals in the sludge. More than 50% of total As, Pb, Fe, Mn and P were found in the fourth residual stable fraction while the other heavy metals were mostly released in the first three more mobile fractions (soluble-exchangeable, reduceable and oxidizable) of the applied fractionation scheme. Special cautions should be considered when using this sludge safely in agriculture concerning the calculation of the loadings of heavy metals and their mobility in soils.

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Section: Fractionation Of Heavy Metals and Plant Nutrients In Sewage supporting

confidence: 84%

“…In this way, it is also possible to determine their availability for plants. Several authors (Jamali et al, 2009, Wang et al, 2006, Amir et al, 2005, Fuentes et al, 2004and Merrington et al, 2003 have investigated the distributions of total and chemical fractions of heavy metal elements in sludge at different process stage.…”

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confidence: 99%

Characterization Changes of Heavy Metals Contents and Fractions in Sewage Sludge from Sirt Wastewater Treatment Plant, Libya

2014

Egypt.J. Soil Sci.

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“…Malinowska (2016) found that the residual fraction (F7) constituted as much as 35% of total copper content in municipal sewage sludge. In similar studies, using the Community Bureau of Reference method (BCR), Wang et al (2006) found different content of metals in the residual fractions, depending on the origin of sewage sludge, while Álvarez et al (2002) confirmed high mobility of nickel in sewage sludge.…”

Section: Resultsmentioning

confidence: 97%

“…Likewise, Kabata-Pendias and Pendias (1999) and Wang et al (2006) say that the highest amounts of lead are mainly bound to iron oxides and organic matter. On the whole sewage sludge application decreased the amount of this metal in the organic fraction but the highest amount of lead was noted in the soil with the highest dose of sludge applied.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Liming and Sewage Sludge Application on Heavy Metal Speciation in Soil

Malinowska

2016

Bull Environ Contam Toxicol

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The aim of this paper is to assess the effect of liming and low doses of municipal sewage sludge (5%, 10%, 15% of the soil mass) on lead, chromium and nickel speciation in soil. The 420-day experiment was carried out in laboratory conditions. In all the samples lead, chromium and nickel concentration was determined with the ICP-AES method, while the content of those metals in different fractions was measured with the seven-step Zeien and Brümmer method, on the 30th and 420th days of the experiment. Sewage sludge doses significantly diversified lead, chromium and nickel amounts in the soil. The highest dose of sludge caused a significant increase, compared to the control, in the content of those metals. In the sludge the dominant forms of metals tested in the experiment were lead and chromium bound to organic matter (F4) as well as nickel bound to amorphous iron oxides (F5). Liming decreased the mobility of the metals in the soil.

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“…Currently, the widely accepted belief is that the total amount of heavy metals in sewage sludge cannot provide sufficient information on the potential hazardous effects of such metals on the environment; this is because the biological activity, mobility, and ecotoxicity of heavy metals depend strongly on their specific chemical forms (Obbard, 2001;Planquart et al, 1999;Wang et al, 2006). Chemical forms typically consist of the following: exchangeable fraction (EF), carbonate-bound fraction (CBF), Fe-Mn oxide fraction (FMOF), organic-bound fraction (OBF), and residual fraction (RF).…”

Section: Introductionmentioning

confidence: 99%

Effects on Ni and Cd speciation in sewage sludge during composting and co-composting with steel slag

et al. 2014

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Sewage sludge and industrial steel slag (SS) pose threats of serious pollution to the environment. The experiments aimed to improve the stabilizing effects of heavy metal Ni and Cd morphology in composting sludge. The total Ni and Cd species distribution and chemical forms in the compost sewage sludge were investigated with the use of compost and co-compost with SS, including degradation. The carbon/nitrogen ratio of piles was regulated with the use of sawdust prior to batch aerobic composting experiments. Results indicated that the co-composting with SS and organic matter humification can contribute to the formation of Fe and Mn hydroxides and that the humus colloid significantly changed Ni and Cd species distribution. The decreased content of Ni and Cd in an unstable state inhibited their biological activity. Conclusions were drawn that an SS amount equal to 7% of the dry sludge mass was optimal value to guarantee the lowest amount of Cd in an unstable state, whereas the amount was 14% for Ni.

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Extractable Fractions of Metals in Sewage Sludges from Five Typical Urban Wastewater Treatment Plants of China

Cited by 12 publications

References 19 publications

Characterization Changes of Heavy Metals Contents and Fractions in Sewage Sludge from Sirt Wastewater Treatment Plant, Libya

Characterization Changes of Heavy Metals Contents and Fractions in Sewage Sludge from Sirt Wastewater Treatment Plant, Libya

The Effect of Liming and Sewage Sludge Application on Heavy Metal Speciation in Soil

Effects on Ni and Cd speciation in sewage sludge during composting and co-composting with steel slag

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