Application of accelerated carbonation with a combination of Na2CO3 and CO2 in cement-based solidification/stabilization of heavy metal-bearing sediment

Chen, Quanyuan; Ke, Yujuan; Zhang, Lina; Tyrer, Mark; Hills, Colin D.; Xue, Gang

doi:10.1016/j.jhazmat.2008.11.067

Cited by 38 publications

(15 citation statements)

References 26 publications

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“…The high pH environment of Na 2 CO 3 induced more solubility of the SieO bond from the BHA and increased the formation of CSH gel. In addition, the immediate formation n of microcrystalline structures of CaCO 3 from the reaction between Ca 2þ and CO 3 2À dissociated from the hydrated lime and Na 2 CO 3, respectively, filled the pores and contributed to the strength (Chen et al, 2000; Way and Shayan, 1989). As a result, the strength of the samples with Na 2 CO 3 was highest when compared to the control and to those with Na 2 SiO 3 .…”

Section: Resultsmentioning

confidence: 99%

Performance of lime-BHA solidified plating sludge in the presence of Na2SiO3 and Na2CO3

Piyapanuwat¹,

Asavapisit²

2011

Journal of Environmental Management

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Section: Resultsmentioning

confidence: 99%

Performance of lime-BHA solidified plating sludge in the presence of Na2SiO3 and Na2CO3

Piyapanuwat¹,

Asavapisit²

2011

Journal of Environmental Management

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“…Carbonation reactions effectively reduced the leaching of lead and barium, but increased that of antimony and chromium, whereas arsenic, copper, nickel, and most anions are largely unaffected (Chen et al 2009). Although the single reagent CO reduced the leaching of manganese, carbonate as an assisting reagent further decreased the leachability of manganese.…”

Section: Immobilization Of Manganese By Quicklime and Carbonatesmentioning

confidence: 99%

Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

Hou

Duan

et al. 2015

Environ Sci Pollut Res

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Electrolytic manganese solid waste (EMSW) is a by-product of electrolytic manganese production and generally contains a high concentration of soluble Mn(II) (2000-3000 mg/L). Millions of tons of EMSW are stored in China, and the environmental pollution caused by manganese in this waste product is concerning. Unfortunately, little attention has been paid to the immobilization of manganese from industrial solid waste because manganese is absent from toxicological identification standards, and there is a lack of relevant quality standards in China. The objectives of this study were to immobilize soluble Mn(II) using chemical reagents, to analyze the immobilization mechanism, and to identify the most economical reagents. We investigated the immobilization degrees of soluble Mn(II) achieved by the reagents quicklime (CaO), carbonates (NaHCO 3 and Na 2 CO 3 ), phosphates (Na 3 PO 4 , Na 2 HPO 4 , NH 4 H 2 PO 4 , and Ca 10 (PO 4 ) 6 (OH) 2 ), and caustic magnesia (MgO) both individually and in combination. Our results showed that the use of 9 % CaO+ 5 % NaHCO 3 , 9 % CaO+ 5 % Na 3 PO 4 , 10 % MgO alone, or with 1-5 % NaHCO 3 or 1-5 % Na 2 CO 3 can reduce the amount of Mn(II) leached to 100 mg/kg when the eluate pH was in the range of 6-9. The most economical reagent treatments were determined using K-means cluster analysis. Analysis of the immobilization mechanism showed that CaO + NaHCO 3 may be favorable for immobilizing soluble Mn(II) as precipitation and oxidation products because the addition of NaHCO 3 releases OH − and buffers the system.

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“…For example, solidification/stabilization and chemical treatment may lead to secondary pollution and the complete mixing of treatment reagents with the contaminated sediments is difficult to achieve [8]. For these reasons, new innovative strategies need to be proposed in order to meet cleanup goals in sediment management while also to minimize costs and environmental impact [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A novel integrated active capping technique for the remediation of nitrobenzene-contaminated sediment

Sun¹,

Xu²,

Gao³

et al. 2010

Journal of Hazardous Materials

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Application of accelerated carbonation with a combination of Na2CO3 and CO2 in cement-based solidification/stabilization of heavy metal-bearing sediment

Cited by 38 publications

References 26 publications

Performance of lime-BHA solidified plating sludge in the presence of Na2SiO3 and Na2CO3

Performance of lime-BHA solidified plating sludge in the presence of Na2SiO3 and Na2CO3

Immobilization of high concentrations of soluble Mn(II) from electrolytic manganese solid waste using inorganic chemicals

A novel integrated active capping technique for the remediation of nitrobenzene-contaminated sediment

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