Organic compounds in the cement-based stabilisation/ solidification of hazardous mixed wastes—Mechanistic and process considerations

Pollard, Simon J. T.; Montgomery, D.M.; Sollars, C.J.; Perry, R.

doi:10.1016/0304-3894(91)87082-d

Cited by 86 publications

(44 citation statements)

References 31 publications

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“…Also, pozzolanic reactions occur more slowly. 8 This paper is about the S/S of a real industrial waste, which is representative of a large number of wastes whose main management problem stems from their hexavalent chromium content. Cr(VI) is a toxic and hazardous species that is difficult to stabilize because of its high mobility.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of a Chromium-Containing Solid Waste: Immobilization of Hexavalent Chromium

Rodríguez‐Piñero

et al. 1998

Journal of the Air & Waste Management Association

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This article describes the stabilization/solidification (S/S) of a steel industry waste, using a common type-F fly ash from a coal power station as the main binder. The waste, which contains hazardous levels of metals, may be stabilized by a conventional S/S to achieve permissible Pb, Cd, and Zn concentrations in the Toxicity Characteristic Leaching Procedure (TCLP) leachates of S/S solids. On the other hand, the stabilization of Cr(VI), also present in the waste, requires a reducing pretreatment stage with ferrous sulfate to attain TCLP leachates within limits. A bibliographic study on the stabilization of Cr(VI)-containing wastes is included in the paper, along with a discussion on the lowest Cr concentration in TCLP and aqueous (DIN) leachates.

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Section: Introductionmentioning

confidence: 99%

Stabilization of a Chromium-Containing Solid Waste: Immobilization of Hexavalent Chromium

Rodríguez‐Piñero

et al. 1998

Journal of the Air & Waste Management Association

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“…Typical reactions in PF A/cement systems are presented in eq. 2.6 -2.9 (Pollard et at., 1991 A + S + H-»C x A ySzH w (hydrogarnet) (2)(3)(4)(5)(6)(7)(8) CH + S + A + H -» Cx Ay (CS)Z Hw (ettringite and derivatives) (2.9) The replacement of portlandite with C-S-H following the pozzolanic reaction, described above, induces physical and chemical changes to the hardened cement. The space occupied by the clusters of portlandite is replaced with fine gel porosity of C-S-H, lowering the permeability, increasing strength and changing the pore size distribution (Bye, 1999).…”

Section: Pulverised Fuel Ash (Pfa)mentioning

confidence: 99%

“…Remediation formulations consisting of Portland cement were found to be effective for the treatment of PCBs (Pollard et al, 1991). PCBs are practically insoluble in water, therefore tend to be well immobilised in the cement matrix .…”

Section: Polychlorinated Byphenyls (Pcbs) and Dioxinsmentioning

confidence: 99%

“…High concentrations of organics pose a major concern for S/S since they have a retarding effect on the reaction of cement (Pollard et al 1991), and may be mobilised after the curing of the solidified mix (Vipulanandan, 1995). This is due to the reliance of TPH immobilisation on physical encapsulation in voids formed in the cement matrix and sorption on cement hydrates (Karamalidis and Voudrias, 2007;Leonard and Stegemann, 2010).…”

Section: Total Petroleum Hydrocarbons (Tphs)mentioning

confidence: 99%

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Performance assessment of stabilised/solidified waste-forms

Antemir¹

2005

Stabilisation/Solidification Treatment and Remediation

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“…Bağlayıcılık özelliğine sahip uçucu külün reaksiyonu ve oluşan ürünler kapsamlı bir şekilde Pollard ve diğ. [8] tarafından aşağıda verilmiştir.…”

Section: Introductionunclassified

Production of block by using fly ash, lime and glass powder

Turğut¹

2018

Pamukkale J Eng Sci

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(Kalsiyum-Alüminat-Kalsiyum-Sülfat-Hidrat)Portland çimentosuz, salt uçucu külden blok ya da briket üretimiyle ilgili sınırlı sayıda çalışma yapılmıştır. Berry ve diğ.[3] sadece C sınıfı uçucu kül kullanarak beton üretmiş ve ürettikleri betonun yapısal performansının iyi olduğunu belirtmişlerdir. , C sınıfı uçucu kül-kalker tozu, uçucu kül-kalker tozu-silis dumanı ve uçucu kül-kalker tozucam tozu kullanarak üç farklı yığma yapı bloku üretmiştir. Blokların üretiminde şu yol izlenmiştir; karışımı oluşturan toz malzemeler mikserde önce kuru olarak karıştırılmış, karıştırma devam ederken nemlendirilmiş ve daha sonra çelik

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Organic compounds in the cement-based stabilisation/ solidification of hazardous mixed wastes—Mechanistic and process considerations

Cited by 86 publications

References 31 publications

Stabilization of a Chromium-Containing Solid Waste: Immobilization of Hexavalent Chromium

Stabilization of a Chromium-Containing Solid Waste: Immobilization of Hexavalent Chromium

Performance assessment of stabilised/solidified waste-forms

Production of block by using fly ash, lime and glass powder

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