Mineralogy and leachability of gasified sewage sludge solid residues

Hernández, Ana Belén Roig; Ferrasse, Jean‐Henry; Chaurand, Perrine; Saveyn, Hans; Borschneck, Daniel; Roche, Nicolás

doi:10.1016/j.jhazmat.2011.04.070

Cited by 51 publications

(38 citation statements)

References 39 publications

(49 reference statements)

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“…A source of phosphorus in wastewater can be from food processing or from H 3 PO 4 in wastewater from electroplating. Also, addition of coagulants rich in Al or Fe may lead to precipitation of P‐rich minerals in sludge treatment as observed by Frossard et al and Hernandez et al . We detected no PTE occurring as discrete mineral phases by XRD.…”

Section: Resultssupporting

confidence: 74%

Release of Potentially Toxic Elements From Industrial Sludge: Implications for Land Disposal

Dung

Cappuyns

Vassilieva

et al. 2015

CLEAN Soil Air Water

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In recent years, rapid industrial development has led to an increase in various types of industrial waste generation in Vietnam. Potentially toxic elements (PTEs) can contaminate water resources when waste is not properly treated and/or stored in confined disposal facilities. This study characterizes the occurrence and leaching behavior of PTEs from industrial sludge under the influence of oxidation and pH with implications for open dump disposal. Environmental issues related to possible management options are also addressed. Sludge samples from industrial parks at Binh Duong and Dong Nai, Southern Vietnam, were oxidized under atmospheric conditions. The results indicate that Fe and Mn (both samples) and Cu, Ni, and Zn (Binh Duong sample) may pose a potential threat to the water quality for sludge dumped near water bodies. Therefore, we recommend avoiding uncontrolled upland disposal of such sludge. Some preliminary treatment to immobilize PTEs should be applied to the sludge originating from Binh Duong prior to upland disposal. A recovery of Ni and Zn from this sludge could be considered. For the less contaminated sludge from Dong Nai, beneficial use, such as land application for agricultural purposes, is a possible option.

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Section: Resultssupporting

confidence: 74%

Release of Potentially Toxic Elements From Industrial Sludge: Implications for Land Disposal

Dung

Cappuyns

Vassilieva

et al. 2015

CLEAN Soil Air Water

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“…As, Cr, Cu, Ni and Zn concentrations were on average higher in German SSA, which is because the survey included a mean value including both municipal and industrial SSA. Concentrations in the Gasification ashes of this study were compared to previous researches on gasification SSA (Hernandez et al 2011;Gil-Lalaguna et al 2015). On average, Al, Ca, P, S and Cr content were in the range of literature values, whereas the rest of elements were below it, except for Pb and Zn.…”

Section: Ssa Characterisationmentioning

confidence: 66%

“…These phases were respectively identified in other incineration (Franz, 2008;Donatello et al 2010;Ottosen et al 2014;Li et al 2015) and gasification SSA (Hernandez et al 2011;Gil-Lalaguna et al 2015).The presence of Fe2O3 in incineration SSA is due to the reaction of iron phosphate with lime, and the consequent formation of more acid-soluble calcium phosphate (Martinez et al 2014;Li et al 2015). In contrast, the lack of hematite in Gasification SSA could indicate the presence of FePO4, although it was not identified neither in the XRPD analyses of the present work nor in previous studies on gasification SSA (Hernandez et al 2011;Gil-Lalaguna et al 2015). One reason could be that it was found in an amorphous phase, since there was a hump in the pattern from 10° to 40° (2θ), but it requires further study.…”

Section: Ssa Characterisationmentioning

confidence: 94%

“…M. Ottosen et al 2013) or gasification (Hernandez et al 2011;Martinez et al 2014;Parés Viader et al 2015), including element composition and acid extraction of P and other elements. Electrodialytic (ED) methods have also been investigated to recover P from incineration and low-temperature (LT) gasification SSA with high content in Fe and Al, and separate it from impurities like HMs (Parés Viader et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of phosphorus recovery from incineration and gasification sewage sludge ash

Viader

Jensen

Ottosen

et al. 2016

Water Science and Technology

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Incineration of sewage sludge is a common practice in many western countries. Gasification is an attractive option because of its high energy efficiency and flexibility in the usage of the produced gas. However, they both unavoidably produce sewage sludge ashes, a material which is rich in phosphorus, but that it is commonly landfilled or used in construction materials. With current uncertainty in phosphate rock supply, phosphorus recovery from sewage sludge ashes has become interesting. In the present work, ashes from incineration and gasification of the same sewage sludge were compared in terms of phosphorus extractability using electrodialytic methods. The results show that comparable recovery rates of phosphorus were achieved with a single electrodialytic step for incineration ashes and a sequential combination of two electrodialytic steps for gasification ashes, which was due to a higher influence of iron and/or aluminium in phosphorus solubility for the latter. A product with lower level of metallic impurities and comparable to wet process phosphoric acid was eventually obtained from gasification ashes. Thus, gasification becomes an interesting alternative to incineration also in terms of phosphorus separation.

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“…. Over a period of time, some of the precipitates are broken down into their elemental forms and introduced back in the solution [13]. Also, it may have been subjected to desorption and, hence, could have got introduced into the solution.…”

Section: Results and Discussion Leaching Studiesmentioning

confidence: 99%

Efficacy of nano calcium silicate (NCS) treatment on tropical soils in encapsulating heavy metal ions: leaching studies validation

Mohammed¹,

Moghal

2016

Innov. Infrastruct. Solut.

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Soils are known to retain heavy metals through a number of processes. In this study, four different leaching methods viz. ASTM D3987, toxicity characteristics leaching procedure (TCLP), extended TCLP, and caged TCLP have been used to study the leaching behavior of Cd 2? , Ni 2? and Pb 2? on red and black cotton soils. Further, these soils were amended with nano calcium silicate (NCS). Also, sequential extraction was performed on these soil mixtures to know the extent of sorption taking place in different phases of soils such as exchangeable, oxidizing, reducing, organic content and residual phases. It was found that as per ASTM D3987, all three heavy metals with red soil and black cotton soil were retained well in the short term, and over a long-term period, the metal ion was released back. When amended with NCS, both red soil and black cotton soil exhibited satisfactory retention levels over long periods which proved that NCS was responsible for encapsulation of metal ions in its matrix. To investigate the retention efficiency, extensive leaching tests were performed, and it was found that as per TCLP, extended TCLP and caged TCLP tests, the retention with NCS-amended red earth soil was 88, 90 and 94 % compared to untreated case. Sequential extraction proved that encapsulation was durable in NCS-amended soils compared to untreated ones.Hence, it is concluded that NCS-amended soil is a prospective material to attenuate heavy metals taking into consideration their long-term encapsulation effect in considered soils. This soil NCS mixture is expected to be a potent agent for in situ treatment of brown fields and an excellent substitute for existing conventional landfill liner materials.

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Mineralogy and leachability of gasified sewage sludge solid residues

Cited by 51 publications

References 39 publications

Release of Potentially Toxic Elements From Industrial Sludge: Implications for Land Disposal

Release of Potentially Toxic Elements From Industrial Sludge: Implications for Land Disposal

Comparison of phosphorus recovery from incineration and gasification sewage sludge ash

Efficacy of nano calcium silicate (NCS) treatment on tropical soils in encapsulating heavy metal ions: leaching studies validation

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