The influence of sewage sludge properties on sludge-borne metal availability

Merrington, Graham; Oliver, Ian W.; Smernik, Ronald J.; McLaughlin, Michael J.

doi:10.1016/s1093-0191(02)00139-9

Cited by 106 publications

(61 citation statements)

References 73 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.…”

mentioning

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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“…The properties of the sludge play an important role in the availability of heavy metals in amended soils. Bioavailable forms of heavy metals in recently amended soils are most likely to be those that are bioavailable in the sewage sludge (Merrington et al 2002). A major concern with the safe re-use of biosolids on land is the potential for release of metals from organic matter in the biosolids, due to decomposition proceeding (Stacey et al 2001).…”

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confidence: 99%

The Cd mobility in incubated sewage sludge after ameliorative materials additions

Hanč¹,

Tlustoš²,

Száková³

et al. 2006

PLANT SOIL ENVIRON

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Cadmium mobility in sewage sludge amended by four types of ameliorative materials (lime, limestone, bentonite and zeolite) incubated under aerobic and anaerobic conditions for eight months was studied in the experiment. The most statistically significant decrease of available Cd extracted by 0.01 mol/l CaCl 2 was recorded in sludge between second and fourth months of incubation. As most effective stabilizers were found limestone and bentonite added into the sludge incubated under aerobic and anaerobic conditions respectively. The presence of air reduced Cd mobility in individual sludges more than lack of air. Cadmium was separated by sequential extraction into five fractions as water soluble, exchangeable, bound with Fe and Mn oxides, organically bound, and residual fraction. Sequential analysis showed decrease of Cd in exchangeable and oxide fractions in sludge treated by lime and limestone at the end of aerobic incubation. Cadmium was found in water soluble and exchangeable fractions in small portion, even so its content in these fractions was higher than determined in slighter 0.01 mol/l CaCl 2 solution.

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“…Table 1 presents average parameter values of the process-purified thickened sludge as determined during the study. The temperature of the thickened sludge during the analysed period was [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] o C. Microbiological examinations were carried out in an accredited laboratory of the Province Environmental Protection Inspectorate in Bialystok and the typical presence of microflora and microfauna for the active sludge was confirmed. The quality composition of the sludge is presented in Table 2.…”

Section: Sewage Sludgementioning

confidence: 99%

“…They may indicate salinity which in relation to sludge is very rarely tested. It is known however, that the older the sludge is, the less salt it contains [Merrington et al 2003]. Great changes of conductivity may also result from work perturbation of a sewage-treatment plant.…”

Section: Introductionmentioning

confidence: 99%

Drop in Conductivity of Sewage Sludge in the Process of Autothermal Thermophilic Aerobic Digestion

Bartkowska

2017

J. Ecol. Eng.

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The article presents research on the assessment of electrolytic conductivity changes of sludge during the process of its autothermal thermophilic aerobic digestion (ATAD), which takes place in a two-stage installation system, operating in a municipal sewagetreatment plant. In the years 2012-2014 sludge was studied and the results were analyzed. Thickened sludge in the intermediate tank, which was then directed to installation reactors, was examined. Conductivity was measured in each tank. In this manner collected results made it possible to follow the changes of this index at consecutive stages of the system. The results were statistically analyzed and it was determined to what degree, as a result of an objective process, the values of processed sludge conductivity would change. The conclusions from the carried-out studies and from own experiments are also presented.

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The influence of sewage sludge properties on sludge-borne metal availability

Cited by 106 publications

References 73 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 Cd mobility in incubated sewage sludge after ameliorative materials additions

Drop in Conductivity of Sewage Sludge in the Process of Autothermal Thermophilic Aerobic Digestion

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