Investigations on twenty Australian sewage sludges ? their evaluation by means of chemical analysis

Vries, M. P. C. de

doi:10.1007/bf01049668

Cited by 11 publications

(4 citation statements)

References 6 publications

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“…The mobility of cadmium in sewage sludge sample was determined by 0.01 mol/l CaCl 2 solution, which belongs to leaching agents the best correlated with cadmium content in plants. That knowledge was confirmed by De Vries (1983) who used a lot of leaching agents to evaluate twenty sewage sludges for applicability into agricultural land. The 0.01 mol/l CaCl 2 solution correlated very closely with cadmium available to plants (McBride et al 2004).…”

Section: Resultsmentioning

confidence: 70%

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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Section: Resultsmentioning

confidence: 70%

The Cd mobility in incubated sewage sludge after ameliorative materials additions

Hanč¹,

Tlustoš²,

Száková³

et al. 2006

PLANT SOIL ENVIRON

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“…Applying biosolids to land increases the salinization potential marginally (0.02 kgNaeq/kgP), while the salinization potential of struvite was assumed equal to fertilizers. It is acknowledged that the composition of greywater and biosolids varies with consumer choices, influent water quality, and the processes and chemicals used during treatment and biosolids handling. , A typical composition was used to highlight the salinization potential of different phosphorus products, though cases would have to be assessed for specific regions.…”

Section: Resultsmentioning

confidence: 99%

“…It is acknowledged that the composition of greywater and biosolids varies with consumer choices, 70 influent water quality, and the processes and chemicals used during treatment and biosolids handling. 71,72 A typical composition was used to highlight the salinization potential of different phosphorus products, though cases would have to be assessed for specific regions.…”

Section: Global Warmingmentioning

confidence: 99%

Environmental Benefits and Burdens of Phosphorus Recovery from Municipal Wastewater

Bradford-Hartke

Lane

Lant

et al. 2015

Environ. Sci. Technol.

119

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The environmental benefits and burdens of phosphorus recovery in four centralized and two decentralized municipal wastewater systems were compared using life cycle assessment (LCA). In centralized systems, phosphorus recovered as struvite from the solids dewatering liquid resulted in an environmental benefit except for the terrestrial ecotoxicity and freshwater eutrophication impact categories, with power and chemical use offset by operational savings and avoided fertilizer production. Chemical-based phosphorus recovery, however, generally required more resources than were offset by avoided fertilizers, resulting in a net environmental burden. In decentralized systems, phosphorus recovery via urine source separation reduced the global warming and ozone depletion potentials but increased terrestrial ecotoxicity and salinization potentials due to application of untreated urine to land. Overall, mineral depletion and eutrophication are well-documented arguments for phosphorus recovery; however, phosphorus recovery does not necessarily present a net environmental benefit. While avoided fertilizer production does reduce potential impacts, phosphorus recovery does not necessarily offset the resources consumed in the process. LCA results indicate that selection of an appropriate phosphorus recovery method should consider both local conditions and other environmental impacts, including global warming, ozone depletion, toxicity, and salinization, in addition to eutrophication and mineral depletion impacts.

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“…Echavarria et al, 1998;Brun et al, 2001;Li et al, 2004: Oliver et al, 2006. can result in differing quantities of metal being extracted (de Vries, 1983;Fujii and Corey, 1986). Also, metals released by one reagent may be re-adsorbed to remaining solid phases during extractions and thus the available fraction may be underestimated (Bermond, 2001).…”

Section: Stable Isotope Exchange (Sie)mentioning

confidence: 99%

Geochemical associations and availability of cadmium (Cd) in a paddy field system, northwestern Thailand

Kosolsaksakul

Farmer

Oliver

et al. 2014

Environmental Pollution

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The Mae Tao watershed, northwest Thailand, has become contaminated with cadmium (Cd) as a result of zinc ore extraction (Padaeng deposit) in the nearby Thanon-Thongchai mountains. Consumption of contaminated rice has led to documented human health impacts. The aim of this study was to elucidate transfer pathways from creek and canal waters to the paddy field soils near Baan Mae Tao Mai village and to determine the relationship between Cd speciation in the soil and uptake by rice plants. Transfer mainly occurred in association with particulate matter during flooding and channel dredging and, in contrast with many other studies, most of the soil Cd was associated with exchangeable and carbonate-bound fractions. Moreover, there was a linear relationship between soil total Cd and rice grain Cd (R(2) = 0.715), but a stronger relationship between both the Tessier-exchangeable soil Cd and the BCR-exchangeable soil Cd and rice grain Cd (R(2) = 0.898 and 0.862, respectively).

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Investigations on twenty Australian sewage sludges ? their evaluation by means of chemical analysis

Cited by 11 publications

References 6 publications

The Cd mobility in incubated sewage sludge after ameliorative materials additions

The Cd mobility in incubated sewage sludge after ameliorative materials additions

Environmental Benefits and Burdens of Phosphorus Recovery from Municipal Wastewater

Geochemical associations and availability of cadmium (Cd) in a paddy field system, northwestern Thailand

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