Utilization of air pollution control residues for the stabilization/solidification of trace element contaminated soil

Travar, Igor; Kihl, Anders; Kumpienė, Jūratė

doi:10.1007/s11356-015-5087-1

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…Городские территории испытывают высокую антропогенную нагрузку, в результате которой происходит сильная загрязнённость почв тяжёлыми металлами. Поступление последних в почву обусловлено выбросами автотранспорта, промышленных предприятий, тепловых электростанций, миграцией со свалок и открытых карьеров [10,[20][21][22][23]. Подвижность металлов зависит не только от их концентрации, но и от свойств почвы (рН, размера частиц, содержания органического вещества, окислительно-восстановительного потенциала, катионообменной способности) и факторов окружающей среды [24,25].…”

Section: Discussionunclassified

Ecological evaluation of the urban soil in Perm

Maslennikova

Shishkin

Sherstobitova

et al. 2021

Hygiene and Sanitation

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Introduction. Representations of the impact of anthropogenesis processes on the soil’s ecological state are the basis for improvement of the environmental pollution monitoring system to make correct architectural and planning decisions. Material and methods. During 2016-2018 an environmental assessment of pollution of 214 samples of urban soils was performed. The soil analysis was carried out according to a random sample as one test site per 1 km². The concentration of heavy metals was determined by atomic absorption spectrometry. The analysis of organic compounds was carried out by gas chromatography-mass spectrometry. The total number of heterotrophic and gram-negative bacteria of the Enterobacteriaceae family was determined by direct seeding on selective media. Statistical data processing was carried out using software Statistica. Results. The level of chemical contamination with water-soluble forms of heavy metals of Perm soils was assessed. The concentration of heavy metals Cu, Pb, Zn, Fe, Cd, Ni, Mn in the control samples of sandy/loamy soils was 0.09/0.15; 0.08/0.22; 0.22/0.39; 5.57/16.14; 0.02/0.01; 0.06/0.13; 0.74/3.14 mg/l, respectively. The values of the total pollution index (Zc) above 16 were recorded at 4.7% of the soil samples, which corresponds to a moderate degree of pollution. It was shown that the soil type influenced Zc (KW-H (3; 214) = 30.73; p = 0.00001) and amounted to 6.24 ± 3.72 for loamy soils; for peat - 22.42 ± 12.32; for sand - 9.23 ± 5.70; for old urban soils - 8.37 ± 4.07. The median of the heterotroph bacteria content in the soils for I (Zc: 0-4) and IV (Zc ≤ 16) groups was revealed to correspond to the categories of «poor,» II (Zc: 4-8) and III (Zc: 8-16) groups - «inferior» soil. A correlation between the content of heterotrophs and the number of bacteria E. coli was not detected. According to Zc, for each soil group, no statistical differences in phthalate content were noted. Conclusion. Environmental assessment of soils should be comprehensive, as the types of anthropogenic chemical pollution, that have varying degrees of correlations between each other, affect quantitative changes in soil microbiota, which in the future may determine the ability to maintain homeostasis in this ecosystem.

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Section: Discussionunclassified

Ecological evaluation of the urban soil in Perm

Maslennikova

Shishkin

Sherstobitova

et al. 2021

Hygiene and Sanitation

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“…The concentrations of Bi, Hf (Figure 3), W, Zr (Figure 4), Nb (Figure 5), Cr, and Cu (Figure 6) are at similarly low level. As can be seen from literature data and the calculated Clarke values for coal and its ashes [47], the W [41], Zr [48,49], Hf [50,51], Nb [37,52], and Cr [53,54] concentrations in coal may be sufficiently high to justify their recovery. When it comes to Bi, Cu, and Y concentrations in the ash from the combustion of sample 1, they were shown to be above their average Clarke values but at the same time well below the designated Clarke value for coal ash.…”

Section: For Example Such Elements As Bismuth (Bi) Chromium (Cr) Cuprum (Cu) Germanium (Ge) Hafnium (Hf) Niobium (Nb) Tungsten (W) and Ytmentioning

confidence: 94%

Selected Critical Raw Materials in Waste from Coal Gasification in Poland

Bielowicz

2021

Energies

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In an effort to identify new sources of critical raw materials (CRMs) possibility of recovering selected CRMs from Polish coals, chars, and ashes resulting from the combustion of coals and chars was investigated. The samples were collected from pilot fluidized bed gasification systems. The search for CRMs in coal gasification wastes has not been widely reported before. The study used 2 bituminous coal and 1 lignite sample; the concentration of individual critical raw materials (CRMs) was analyzed using the ICP-MS method. The obtained results were compared with Clarke values in coal ash and in the Earth’s crust, and with the adopted cut-off grade. As shown by the analysis, the highest concentrations of CRMs can be found in fly ash, mainly in samples from the eastern part of the Upper Silesian Coal Basin. This applies mostly to Be, Cs, or Sb due to the fact that their concentrations were found to be higher than the Clarke value in the Earth’s crust; the mentioned fly ashes could be used as potential sources of critical elements if appropriate recovery technologies are developed. In addition, the tested materials have elevated Se, Pb, Ni concentrations, but their recovery is currently not economically viable. Compared to the currently adopted cut-off grade levels, there are no critical elements in the analyzed coal gasification waste that could be recovered.

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“…Solidification/stabilization (S/S) treatment is widely used for treatment of the remediation of heavy metal-contaminated soils, and is regarded as the most efficient and effective technology [1]. Cement and hydrated lime are the most common stabilizing agents in S/S processes.…”

Section: Introductionmentioning

confidence: 99%

Study on the Stabilization/Solidification of Lead-Contaminated Soil Using Alkali-Activated Cementing Materials with Rich-Silicon Materials

Zhou

et al. 2017

AMR

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In this study, the stabilization/solidification of lead in soils using alkali-activated cementing materials with rich-silicon materials was investigated. The artificial Pb-polluted soil with 500mg/kg lead was treated using fly ash-, silica fume-and rice husk ash-based cementitious materials, respectively, at the dosages 25%. The effectiveness of treatment was assessed with unconfined compressive strength (UCS) and the toxicity characteristic leaching procedure (TCLP) after curing for 14 and 28 days. Overall, the UCS results showed that the UCS values are above the USA EPA’s recommended value of 0.35 MPa. The TCLP results indicated that the Pb concentrations extracted from soils amended with 25% cementitious materials after 14 and 28 days are near 0.25mg/L, far below 5mg/L (the TCLP regulatory limit). And the XRD results showed the immobilization of lead were due to the formation of PbSiO3, the sorption of C-S-H.

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Utilization of air pollution control residues for the stabilization/solidification of trace element contaminated soil

Cited by 4 publications

References 31 publications

Ecological evaluation of the urban soil in Perm

Ecological evaluation of the urban soil in Perm

Selected Critical Raw Materials in Waste from Coal Gasification in Poland

Study on the Stabilization/Solidification of Lead-Contaminated Soil Using Alkali-Activated Cementing Materials with Rich-Silicon Materials

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