Assessment of heavy metals and rheological characteristics of coal ash samples in presence of some selective additives

  • G. K. Pani
  • P. Rath
  • L. Maharana
  • R. Barik
  • P. K. Senapati
Original Paper
First Online:
Received:
Revised:
Accepted:

Abstract

The huge quantity of coal ash produced in Indian thermal power plants is disposed of in ash landfills or ash ponds. The deposition of ash in ash ponds through conventional lean slurry form is viewed as a major potential release of many environmentally sensitive heavy metals due to possible contamination with ground water. An attempt has been made in this paper to assess the leachability of the heavy metals such as Cu, Pb, Ni, Co, Zn, Cd, Hg and As from two Indian power plant ash samples in the presence of some selective low-cost additives. The additives used for the study were sodium silicate (Na2SiO3·5H2O), Reetha fruit (botanical name: Sapindus Mukorossi) extract, banana leaf extract, Aloe vera juice and active carbon. By adopting short duration (7 days) batch leaching test and toxicity characteristics leaching procedure (TCLP), the behaviour of various heavy metal ions released in water influenced by small dosage of these selective additives has been analysed. By introducing the same additives, the rheological behaviour of the two fly ash samples at high solids concentration (C W = 55–67.5 % by weight) was carried out using a HAAKE rotational rheometer (model: RheoStress 1, Thermo Fisher Scientific). The influence of small dosage of these additives on rheological parameters of the ash-water slurry has been discussed.

Keywords

Fly ash Leaching Heavy metals Rheology Plastic viscosity 
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Notes

Acknowledgments

The authors are thankful to Director, CSIR-Institute of Minerals and Materials Technology, for giving permission to publish the paper. The partial funding by M/s Jindal Steel & Power Limited, Raigarh, India, for the present investigation is acknowledged.

References

  1. Ahmad M, Rajapaksha AU, Lim JE, Zhang M, Bolan N, Mohan D (2014) Biochar as a sorbent for contaminant management in soil and water: a review. Chemosphere 99:19–33CrossRefGoogle Scholar
  2. Belviso C, Cavalcante F, Spartaco DiG, Palma A, Ragone P, Fiore S (2014) Mobility of trace elements in fly ash and in zeolitised coal fly ash. Fuel 144:369–379CrossRefGoogle Scholar
  3. Chen H, Wang X, Zhong L, Xu S, Xiao T (2014) Comparison of Mercury emission in USA & China—the way of effective control of Hg from the power plant. Int J Waste Resour 4(2):138Google Scholar
  4. Dawle N, Khadse SK, Patil PV, Panhekar D (2014) Evolution of fly ash management strategies—a review of selected value-added fly ash utilization approaches. Int J Adv Res 2(2):847–853Google Scholar
  5. Fatoba OO, Petrik LF, Akinyeye RO, Gitari WM, Iwuoha EI (2015) Long-term brine impacted fly ash. Part 1: chemical and mineralogical composition of the ash residues. Int J Environ Sci Technol 12:551–562CrossRefGoogle Scholar
  6. Iyer R (2002) The surface chemistry of leaching of coal fly ash. J Hazard Mater B93:321–329CrossRefGoogle Scholar
  7. Kilpimaa S, Kuokkanen T, Lassi U (2013) Characterization and utilization potential of wood ash from combustion process and carbon residue from gasification process. BioResources 8(1):1011–1027CrossRefGoogle Scholar
  8. Kosson DS, Garrabrants AC, Delapp R, Sloot HAV (2014) pH-dependent leaching of constituents of potential concern from concrete materials containing coal combustion fly ash. Chemosphere 103:140–147CrossRefGoogle Scholar
  9. Krgovic R, Trifkovic J, Opsenica DM, Manojlovic D, Mutic J (2015) Leaching of major and minor elements during transport and storage of coal ash obtained in power plant. Sci World J 2014:1–8CrossRefGoogle Scholar
  10. Kumar S, Mohapatra SK, Gandhi BK (2013) Effect of addition of fly ash and drag reducing on the rheological properties of bottom ash. Int J Mech Mater Eng 8(1):1–8Google Scholar
  11. Lokeshappa B, Dikshit AK, Luo Y (2014) Assessing bioaccessible fractions of arsenic, chromium, lead, selenium and zinck in coal fly ashes. Int J Environ Sci Technol 11:1601–1610CrossRefGoogle Scholar
  12. Manjunatha LS, Sunil BM (2013) Stabilization/solidification of iron ore mine tailings using cement, lime and fly ash. Int J Res Eng Technol 2(12):625–635CrossRefGoogle Scholar
  13. Naik HK, Mishra MK, Rao KUM (2011) Influence of chemical reagents on rheological properties of fly ash-water slurry at varying temperature environment. Coal Combust Gasif Prod 3:83–93Google Scholar
  14. Rind AM, Mastoi GM, Quarishi MA, Samoo F (2014) Analysis of metal content and physical parameters of bottom ash from a furnace oil based power plant Jamshoro Sindh, Pakistan. Int J Sci Environ Technol 3(2):434–439Google Scholar
  15. Senapati PK, Mohapatra R, Pani GK, Mishra BK (2012) Studies on rheological and leaching characteristics of heavy metals through selective additive in high concentration ash slurry. J Hazard Mater 229–230:390–397CrossRefGoogle Scholar
  16. Seshadri V, Singh SN, Jain KK, Verma AK (2008) Effect of additive on head loss in the high concentration slurry disposal of fly ash. J Inst Eng (India) MC 89:3–10Google Scholar
  17. Shaheen SM, Rinklebe J (2015) Impact of emerging and low cost alternative amendments on the (im)mobilization and phytoavailability of Cd and Pb in a contaminated floodplain soil. Ecol Eng 74:319–326CrossRefGoogle Scholar
  18. Singh K, Lal K (2012) Effect of cetylpyridinium chloride, Triton x-100 and sodium dodecyl sulfate on rheology of fly ash slurry. Int J Sci Res Publ 2(8):1–5Google Scholar
  19. Singh RK, Gupta NC, Guha BK (2014) Assessment of ground water contamination for heavy metals in the proximity of ash ponds. Pollution 75:28016–28019Google Scholar
  20. Sushil S, Batra VS (2006) Analysis of fly ash heavy metal content and disposal in three thermal power plants in India. Fuel 85:2676–2679CrossRefGoogle Scholar
  21. Vlasak P, Chara, Z (2007) Flow behaviour and drag reduction of fluidic ash-water slurries. In: Proceedings of the 17th international conference on hydraulic transport of solids, Hydrotransport-17, BHRA, The Southern African Institute of Mining and Metallurgy, pp 39–55Google Scholar
  22. Wei N (2015) Leachability of heavy metals from lightweight aggregates made with sewage sludge and municipal solid waste incineration fly ash. Int J Environ Res Public Health 12:4992–5005CrossRefGoogle Scholar
  23. Xu W, Wang H, Zhu T, Kuang J, Jing P (2013) Mercury removal from coal combustion flue gas by modified fly ash. J Environ Sci 25:393–398CrossRefGoogle Scholar

Copyright information

© Islamic Azad University (IAU) 2015

Authors and Affiliations

  • G. K. Pani
    • 1
  • P. Rath
    • 2
  • L. Maharana
    • 3
  • R. Barik
    • 3
  • P. K. Senapati
    • 3
  1. 1.KIIT UniversityBhubaneswarIndia
  2. 2.School of Applied SciencesKIIT UniversityBhubaneswarIndia
  3. 3.CSIR-Institute of Minerals and Materials TechnologyBhubaneswarIndia

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