Long-term performance of aged waste forms treated by stabilization/solidification

Antemir, Aurora; Hills, Colin D.; Carey, Paula; Gardner, Kevin H.; Bates, Edward; Crumbie, Alison K.

doi:10.1016/j.jhazmat.2010.04.082

Cited by 31 publications

(14 citation statements)

References 17 publications

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“…This scenario is expected because the leachability of heavy metals in S/S method depends on the hydration days. It is proved by Antemir et al [18] which stated that the long-time hydration of S/S sample has been decreased the leachability in groundwater. This is also supported by Wang et al [19] which study the leachability of heavy metals at 17 years old S/S site and found that, the slow bonding reaction happen between metals and binder.…”

Section: Leachability Of the Pbmentioning

confidence: 91%

Preliminary Study on Remediation of Contaminated Clay Soil Using Cement and Sugarcane Bagasse

et al. 2017

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Abstract. Disposals of agricultural waste in a large volume have an extremely harmful effect on the environment if they are ineffectively treated. To solve this, several appropriate methods has been identified to produce new recycling technique of utilizing the agricultural waste. In this study, the feasibility of using sugarcane bagasse (SCB) as partial replacement binder with cement to stabilized and solidified (S/S) the contaminated soil are investigated. This paper focused on the strength and the leaching characteristic of lead (Pb) contaminated soil treated with SCB and cement. Two tests, namely the Unconfined Compressive Strength (UCS) test and Toxicity Characteristic Leaching Procedure (TCLP) were employed to measure the strength and leaching performance of S/S samples. The experimental results demonstrated that the UCS at 28 days was in a range of 0.82 to 5.66 MPa for sample containing cement and SCB compare to 0.29 MPa of control mix at the same age. The concentration of Pb in the leachates was within the limits specified by US EPA as low as 2.11 mg/L in 28 days. This shows that, the quality of S/S sample containing cement and SCB significantly improve the strength development as well as effectively in reducing the Pb leachability. Based on the finding, SCB could be useful as cheaper, easy available alternatives binder for the treatment of contaminated soil.

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Section: Leachability Of the Pbmentioning

confidence: 91%

Preliminary Study on Remediation of Contaminated Clay Soil Using Cement and Sugarcane Bagasse

et al. 2017

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“…Hills and Pollard (1997) found that the concentration of zinc in the specimen has reduced about 99% on Day 28. In addition, Antemir et al (2010) have conducted a series test about the long-term performance of S/S and the test up to 16 years. The results indicated that the contaminants leach from the S/S soil was not excess the specific limit and the contaminant was immobilized in the solid for a long period of time.…”

Section: Leachability Of Heavy Metalsmentioning

confidence: 99%

Biorefining Waste Sludge From Water and Sewage Treatment Plants Into Eco-Construction Material

Cheng

Huang

et al. 2019

Front. Energy Res.

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This study aims to investigate the feasibility of using different waste sludge and coal combustion residuals in eco-concrete block production. The compressive strength of the eco-concrete blocks produced by waterworks sludge, bottom and fly ashes were 36 MPa, which comply with the standard specifications for paving blocks in Hong Kong. The optimal mixing proportion (by weight) of different materials in the blocks, such as aggregates, cementitious materials, water, and fly ash was 1.1:1.0:0.5:0.22, respectively. The environmental and toxicological impacts of the final products were then evaluated according to the toxicity characteristic leaching procedure (TCLP). While several heavy metals (i.e., Hg, Cu, and Pb) have been identified in the specimens, the levels of these contaminants complied with Standards (US 40 CFR 268.48). Waste materials generated from water and sewage treatment processes and power plants are feasible to be used as ingredients for paving concrete block production. These products are environmentally acceptable and mechanically suitable for resource recovery of waste materials.

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“…However, OPC production is a high-pollution, high-energy-consuming industry and a large carbon dioxide emitter. As a result, new environmentfriendly binders must be urgently developed to substitute for OPC [5]. Many studies have demonstrated that geopolymers are promising options to replace OPC [6].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the authors have developed a new binder, geopolymer fine aggregate (GFA), which is composed of GGBS, FA, CaO, and Na 2 SiO 3 . Mechanical properties and leaching characteristics are widely used to evaluate the effects of binders on solidified/stabilized soils [1,2,5]. Limited information on the mechanical properties and leaching characteristics of GFA-solidified/stabilized soils is also available.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Leaching Characteristics of Geopolymer‐Solidified/Stabilized Lead‐Contaminated Soil

Zhang

Jia

et al. 2019

Advances in Civil Engineering

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Ordinary Portland cement (OPC) is widely used in the solidification/stabilization of Pb-contaminated soils. However, many studies have suggested that the high content of Pb would degrade the mechanical properties of OPC-solidified/stabilized soils. is paper presents a new binder, geopolymer fine aggregate (GFA), composed of ground granulated blast furnace slag, fly ash, CaO, and Na 2 SiO 3 . For comparison, OPC was used as a conventional binder. Mechanical properties and leaching characteristics are typically used to evaluate the effects of binders on solidified/stabilized soils. Nevertheless, limited information on the mechanical properties and leaching characteristics of the GFA-solidified/stabilized soils is available. is study thus investigated the mechanical properties and leaching characteristics of geopolymer-solidified/stabilized Pb-contaminated soil. Unconfined compressive strength test, permeability test, synthetic precipitation leaching procedure, simplified bioaccessibility extraction, phytoavailability extraction (with diethylene-triamine penta-acetic acid), sequential extraction procedure, mercury intrusion porosimetry, and scanning electron microscopy (SEM) were performed on OPC-and GFA-solidified/stabilized soil. e results showed that the GFA presented a better effect on the mechanical properties and leachability of the solidified/stabilized soils than the OPC-solidified/stabilized soils. e GFA-solidified/stabilized soil displayed considerably lower leachability, bioaccessibility, and phytoavailability of Pb and higher mechanical properties and chemical stability than the OPC counterpart. is study demonstrated that GFA had a better effect than OPC on the solidification/stabilization of Pb-contaminated soils.

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Long-term performance of aged waste forms treated by stabilization/solidification

Cited by 31 publications

References 17 publications

Preliminary Study on Remediation of Contaminated Clay Soil Using Cement and Sugarcane Bagasse

Preliminary Study on Remediation of Contaminated Clay Soil Using Cement and Sugarcane Bagasse

Biorefining Waste Sludge From Water and Sewage Treatment Plants Into Eco-Construction Material

Mechanical Properties and Leaching Characteristics of Geopolymer‐Solidified/Stabilized Lead‐Contaminated Soil

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