Investigations on PAHs and trace elements in coal and its combustion residues from a power plant

Verma, Santosh Kumar; Masto, Reginald Ebhin; Gautam, Shalini; Choudhury, Debapriya; Ram, L. C.; Maiti, Subodh Kumar; Maity, Sudip

doi:10.1016/j.fuel.2015.09.005

Cited by 119 publications

(55 citation statements)

References 92 publications

(144 reference statements)

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“…Generally these curves were firstly peaked at about 0.76-1.18 µm and secondly peaked at about 21.1-84.9 µm for 15 FA samples, the particle size span for second one was wider compared to the first one. The same bimodal distribution pattern was also reported elsewhere (Lind et al, 2003;Arkar et al, 2012;Li et al, 2014;Verma et al, 2015). It is generally believed that evaporation, condensation and nucleation of inorganic components in feed coal is responsible for the first peak, while the second peak was results from fusion and coalescence of inorganic components (Linak and Wendt, 1994;Yu, 2004;Li et al, 2014).…”

Section: Size Distribution Of Cfas From 15 Cfppssupporting

confidence: 87%

Characterization of Inorganic Elements within PM2.5 and PM10 Fractions of Fly Ashes from Coal-Fired Power Plants

et al. 2017

Aerosol Air Qual. Res.

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In this study 15 fly ash samples were collected from 15 large-scale coal-fired power plants (CFPPs) in China. The samples were then re-suspended through PM 2.5 and PM 10 inlets and analyzed for the contents of 39 inorganic elements (IEs) using inductively coupled plasma-mass spectroscopy (ICP-MS) and inductively coupled plasma-optical emission spectrometry (ICP-OES). The results show that the particle size distributions for the 15 FAs samples exhibited bimodal patterns. The Ʃ 39 IEs (g g -1 ) for the PM 2.5 (0.292-0.564) in all the 15 CFPPs were higher than that of PM 10 (0.269-0.403). Except for Cu, all the other 38 IEs were more enriched in the PM 2.5 with the PM 2.5 /PM 10 ratios being 1.06-1.73. Considering 13 heavy metals, the same orders occurred between PM 2.5 and PM 10 with Al >> Cr > Zn > Mn > Cu > V > Pb > Sn > Co > As > Sb > Tl > Cd. More attention should be paid to the high contents of Cr in both PM 2.5 (1310 mg g -1 ) and for PM 10 (1240 mg g -1 ) from all 15 CFPPs. 23 IEs for PM 10 and 26 IEs for PM 2.5 had the geo-accumulation index (Igeo) values higher than 0, indicating different pollution levels for them. On the other hand, there was moderate to extreme levels of pollution for Cr, Zn, Cu, Pb, Sn, Sb, Tl, Cd and Al based on Igeo values. The element profiles for PM 2.5 or PM 10 from 15 CFPPs were similar based on low coefficients of divergence for PM 2.5 (0.254 ± 0.038) and PM 10 (0.244 ± 0.054) according to the comparison between any two CFPPs. Most elements with low relative enrichment factors (REF) as less than 0.70 or 0.70-1.30 indicated no or weak condensation occurred for them during coal combustion, while Cr, Cu, Zn, Sn, W and Pb had REF values higher than 1.30 indicated that significant condensation occurred for these elements.

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Section: Size Distribution Of Cfas From 15 Cfppssupporting

confidence: 87%

Characterization of Inorganic Elements within PM2.5 and PM10 Fractions of Fly Ashes from Coal-Fired Power Plants

et al. 2017

Aerosol Air Qual. Res.

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“…Landfill is the traditional CGCC disposal method [2][3], which was not environmental friendly due to the release of heavy metals and polycyclic aromatic hydrocarbons (PAHs) into soils and groundwater [3][4]. Long-term contamination consequently decreases soil quality and threatens human health [5][6].…”

Section: Introductionmentioning

confidence: 99%

Environmental Toxicity Analysis and Reduction of Ceramsite Synthesis from Industrial Coal Gasification Coarse Cinder Waste

Jia

Zheng

et al. 2017

Pol. J. Environ. Stud.

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Coal gasification coarse cinder (CGCC) is the main waste in the coal gasification industry, containing low calorific value but high heavy metal residuals. To achieve environmental toxicity stabilization and waste recycling, we developed a manufacturing method of multiple-functional ceramsite from CGCC by pelletizing and sintering. By altering key parameters during the manufacturing process (including CGCC content, sintering temperature, and time), the physical properties and leaching toxicity of ceramsite were evaluated. Sintering temperature was identified with a significantly positive relationship with ceramsite's compressive strength, whereas CGCC content was negatively correlated with water adsorption. The highest compressive strength (24.00 MPa) and relatively lower water absorption (21.36%) was achieved at 50% CGCC content and 1,150ºC sintering for 30 min. The toxicity tests showed acceptable leaching heavy metals with minimal environmental impact. Considering the energy conservation and the maximal recycling of CGCC, optimal ceramsite manufacturing is suggested as 50% CGCC content and 1,150ºC/10 min sintering temperature/time. Our results indicated that multiple-functional ceramsite manufacturing is a low-cost and environmentally friendly approach for CGCC recycling.

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“…For instance, Liu et al investigated emission characteristics of PAHs from six coals in North China and found that the total risk of toxicity of anthracite coal was lower than that of bituminous coal (Liu et al, 2009). Meanwhile, the PAH contents of coal and its combustion residues from a power plant were investigated and the results showed that the total PAHs in raw coal was much higher than that in fly ash and bottom ash (Verma et al, 2015). In addition, some studies also investigated the formation of PAHs during MSW combustion.…”

Section: Introductionmentioning

confidence: 99%

Emission, distribution and toxicity of polycyclic aromatic hydrocarbons (PAHs) during municipal solid waste (MSW) and coal co-combustion

Peng

Liu

et al. 2016

Science of The Total Environment

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Investigations on PAHs and trace elements in coal and its combustion residues from a power plant

Cited by 119 publications

References 92 publications

Characterization of Inorganic Elements within PM2.5 and PM10 Fractions of Fly Ashes from Coal-Fired Power Plants

Characterization of Inorganic Elements within PM2.5 and PM10 Fractions of Fly Ashes from Coal-Fired Power Plants

Environmental Toxicity Analysis and Reduction of Ceramsite Synthesis from Industrial Coal Gasification Coarse Cinder Waste

Emission, distribution and toxicity of polycyclic aromatic hydrocarbons (PAHs) during municipal solid waste (MSW) and coal co-combustion

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