Clean Technologies and Environmental Policy

, Volume 18, Issue 4, pp 1167–1176 | Cite as

Mechanisms of solidification and subsequent embrittlement of dephosphorization slag used in a subtidal zone as an alternative to sea sand and prevention of solidification by adding dredged soil

  • Hitomi Yano
  • Tetsuji Okuda
  • Satoshi Nakai
  • Wataru Nishijima
  • Terumi Tanimoto
  • Satoshi Asaoka
  • Shinjiro Hayakawa
  • Satoru Nakashima
Original Paper

Abstract

In the recent years, steelmaking slag is attracting attention as suitable materials for restoration of estuary ecosystems. However, there is concern about solidification when the material is applied to create seagrass beds. In this study, dephosphorization slag (DePS) was immersed into seawater for 10 months to examine the solidification processes and its mechanisms to control the strength of solidification. The hypothesis in this study is that solidification could be alleviated by adding dredged soil to the DePS. After 5 months of immersion, the shear strength of the DePS increased from 1.8 to 5.0 kN/m2; however, its shear strength decreased significantly to 3 kN/m2 after 10 months. Furthermore, after 5 months, reddish color was observed on the surface of the DePS, whereas the color of the surface of the DePS turned black at 7 months under reducing condition with covering by mud. To validate the results, we carried out an additional study, in which the DePS was immersed in seawater, and the solidified DePS was subsequently treated with Na2S; the increase and decrease of the shear stress of DePS were reproduced. The solidified DePS before and after exposure to reducing conditions was also analyzed using a combination of microanalysis with an electron probe and Mössbauer spectroscopy. These analyses showed that the solidification was caused by the formation of bridges that composed of iron oxyhydroxides, whereas the subsequent embrittlement of the solidified DePS was attributed to changing in the chemical species of iron.

Keywords

Dephosphorization slag Dredged soil Embrittlement Solidification Subtidal zone 

Supplementary material

10098_2016_1110_MOESM1_ESM.docx (43 kb)
Supplementary material 1 (DOCX 42 kb)
10098_2016_1110_MOESM2_ESM.docx (42 kb)
Supplementary material 2 (DOCX 41 kb)
10098_2016_1110_MOESM3_ESM.jpg (156 kb)
Supplementary material 3 (JPEG 156 kb)

References

  1. Akiyama Y, Yano H, Asaoka S, Okuda T, Nakai S, Nishijima W (2015) Evaluation of steelmaking slag as basal media for coastal primary producers. Mar Pollut Bull 100:240–248CrossRefGoogle Scholar
  2. Asaoka S, Yamamoto T, Yoshioka I, Tanaka H (2009) Remediation of coastal marine sediments using granulated coal ash. J Hazard Mater 172:92–98CrossRefGoogle Scholar
  3. Asaoka S, Okuda T, Nakai S, Nishijima W (2013) Determination method for maximum calcium releasing potential from steel slags, marine sands alternatives in seawater. ISIJ Int 53:1888–1893CrossRefGoogle Scholar
  4. Astera M (2014) The ideal soil: a handbook for the new agriculture. 2nd edn. Agricola***Google Scholar
  5. Backnaes L, Stelling J, Behrens H, Goettlicher J, Mangold S, Verheijen O, Beerkens RGC, Deubener J (2008) Dissolution mechanisms of tetravalent sulphur in silicate metals: evidence from sulphur K edge XANES studies on glasses. J Am Cera Soc 91:721–727CrossRefGoogle Scholar
  6. Blanchet H, Montaudouin X, Lucas A, Chardy P (2004) Heterogeneity of macrozoobenthic assemblages within a Zostera noltii seagrass bed: diversity, abundance, biomass and structuring factors. Estuar Coast Shelf Sci 61:111–123CrossRefGoogle Scholar
  7. Edgar GJ, Shaw C (1995) The production and trophic ecology of shallow-water fish assemblages in southern Australia III: general relationships between sediments, seagrasses, invertebrates and fishes. J Exp Mar Biol Ecol 194:107–131CrossRefGoogle Scholar
  8. Frankignoulle M, Bouquegneau JM (1990) Daily and yearly variations of total inorganic carbon in a productive coastal area. Estuar Coast Shelf Sci 30:79–89CrossRefGoogle Scholar
  9. Frost JD, Han J (1999) Behavior of interfaces between fiber-reinforced polymers and sands. J Geotech Geoenviron Eng 125:633–640CrossRefGoogle Scholar
  10. Gambi MC, Nowell ARM, Jumars PA (1990) Flume observations on flow dynamics in Zostera marina (eelgrass) beds. Mar Ecol Prog Ser 61:159–169CrossRefGoogle Scholar
  11. Harvey OR, Harris JP, Herbert BE, Stiffler EA, Haney SP (2010) Natural organic matter and the formation of calcium-silicate-hydrates in lime-stabilized smectites: a thermal analysis study. Thermochim Acta 505:106–113CrossRefGoogle Scholar
  12. Hayakawa S, Hajima Y, Qiao S, Namatame H, Hirokawa T (2008) Characterization of calcium carbonate polymorphs with Ca K edge X-ray adsorption fine structure spectrometry. Anal Sci 24:835–837CrossRefGoogle Scholar
  13. Hayashi A, Tozawa H, Shimada K, Takahashi K, Kaneko R, Tsukihashi F, Inoue R, Ariyama T (2011) Effects of the seaweed bed construction using the mixture of steelmaking slag and dredged soil on the growth of seaweeds. ISIJ Int 51:1919–1928CrossRefGoogle Scholar
  14. Hayashi A, Asaoka S, Watanabe T, Kaneko R, Takahashi K, Miyata Y, Kim K, Yamamoto T, Inoue R, Ariyama T (2014) Mechanism of suppression of sulfide ion in seawater using steelmaking slag. ISIJ Int 54:1741–1748CrossRefGoogle Scholar
  15. Haynes RJ (2015) Use of industrial wastes as media in constructed wetlands and filter beds-prospects for removal of phosphate and metals from wastewater streams. Cri Rev Environ Sci Technol 45:1041–1103CrossRefGoogle Scholar
  16. Hendriks I, Sintes T, Bouma T, Duarte C (2008) Experimental assessment and modeling evaluation of the effects of the seagrass Posidonia oceanica on flow and particle trapping. Mar Ecol Prog Ser 356:163–173CrossRefGoogle Scholar
  17. Hizon-Fradejas AB, Nakano Y, Nakai S, Nishijima W, Okada M (2009a) Evaluation of blast furnace slag as basal media for eelgrass bed. J Hazard Mater 166:1560–1566CrossRefGoogle Scholar
  18. Hizon-Fradejas AB, Nakano Y, Nakai S, Nishijima W, Okada M (2009b) Anchorage and resistance to uprooting of eelgrass (Zostera marina L.) shoots planted in slag substrates. J Water Environ Technol 7:91–101CrossRefGoogle Scholar
  19. Hizon-Fradejas AB, Nakano Y, Nakai S, Nishijima W, Okada M (2010) Utilizing dredged sediment for enhancing growth of eelgrass in artificially prepared substrates. World Acad Sci Eng Technol 71:116–121Google Scholar
  20. Kamimura T, Nasu S, Tazaki T, Kuzushita K, Morimoto S (2002) Mössbauer spectroscopic study of rust formed on a weathering steel and a mild steel exposed for a long term in an industrial environment. Mater Trans 43:694–703CrossRefGoogle Scholar
  21. Kim K, Asaoka S, Yamamoto T, Hayakawa S, Takeda K, Katayama M, Onoue T (2012) Mechanisms of hydrogen sulfide removal with steel making slag. Environ Sci Technol 46:10169–10174Google Scholar
  22. Kim K, Hibino T, Yamamoto T, Hayakawa S, Mito Y, Nakamoto K, Lee I (2014) Field experiments on remediation of coastal sediments using granulated coal ash. Mar Pollut 83:132–137CrossRefGoogle Scholar
  23. Kim H, Kim K, Jung S, Hwang I, Choi J, Sohn I (2015) Valorization of electric arc furnace primary steelmaking slags for cement applications. Waste Manag 41:85–93CrossRefGoogle Scholar
  24. Li H, Matsunaga N, Takino T (2009) Investigation on biochemical environments of seabed in Isahaya Bay. Annu J Hydraul Eng 53:1501–1506Google Scholar
  25. Mckeown DA, Muller IS, Gan H, Pegg IL, Stolte WC (2004) Determination of sulfur environments in borosilicate waste glasses using X-ray absorption near-edge spectroscopy. J Non-Cryst Solids 333:74–84CrossRefGoogle Scholar
  26. Miki O, Ueki C, Kato T (2013) Control of sulfide release from bottom sediments at borrow pits using steelmaking slag. J Water Environ Technol 11:101–110CrossRefGoogle Scholar
  27. Millero FJ, Yao W, Aicher J (1995) The speciation of Fe(II) and Fe(III) in natural waters. Mar Chem 50:21–39CrossRefGoogle Scholar
  28. Ministry of the Environment, Japan (2013) The information of natural environment (In Japanese). http://www.env.go.jp/water/heisa/heisa_net/setouchiNet/seto/kankyojoho/sizenkankyo/moba_higata.htm
  29. Motz H, Geiseler J (2001) Products of steel slags an opportunity to save natural resources. Waste Manag 21:285–293CrossRefGoogle Scholar
  30. Nagai T, Miki O, Okumura C (2014) Effects of chelated iron on the growth of Sargassaceae species at the germling and immature stages. J Water Environ Technol 12:285–294CrossRefGoogle Scholar
  31. Nasu S (2005) Mössbauer spectroscopy of rust on steels (in Japanese). Corros Eng 54:45–52CrossRefGoogle Scholar
  32. Nishijima W, Tsukasaki A, Tanimoto T, Nagao M, Tsurushima N, Suzumura M (2015a) Applicability of steel slag as a substrate in eelgrass (Zostera marina L.) beds restoration in coastal Japan. Ecol Eng 81:418–427CrossRefGoogle Scholar
  33. Nishijima W, Nakano Y, Hizon-Fradejas AB, Nakai S (2015b) Evaluation of substrates for constructing beds for the marine macrophyte Zostera marina L. Ecol Eng 83:43–48CrossRefGoogle Scholar
  34. Okuda T, Asaoka S, Yano H, Yoshitsugu K, Nakai S, Nishijima W, Sugimoto K, Matsumani D, Asaoka Y, Okada M (2014) Chemical behavior of sand alternatives in the marine environment. Chemosphere 111:164–168CrossRefGoogle Scholar
  35. Okumiya E, Kuwae T, Hagimoto Y, Konuma S, Miyoshi E, Nomura M, Nakamura Y (2001) Relationships between sedimentary strength and environmental factors in intertidal flats: experiments by using Cone Penetration Tests (in Japanese). Port Airport Res Inst 1002:1–22Google Scholar
  36. Rayner-Canham G, Flynn C (2010) Iron ocean seeding. Educ Chem 47:140–143Google Scholar
  37. Takeoka H (2002) Progress in Seto Inland Sea research. J Oceanogr 58:93–107CrossRefGoogle Scholar
  38. Tamaki H, Tokuoka M, Nishijima W, Terawaki T, Okada M (2002) Deterioration of eelgrass, Zostera marina L., meadows by water pollution in Seto Inland Sea, Japan. Mar Pollut Bull 44:1253–1258CrossRefGoogle Scholar
  39. Tanner JE (2015) Restoration of the seagrass amphibolis antarctica-temporal variability and long-term success. Estuar Coasts 38:668–678CrossRefGoogle Scholar
  40. Terawaki T, Shimaya M, Moriguchi A (2005) Excellent examples of eelgrass Zostera marina bed restoration continuing along the coast of Seto Inland Sea, Japan (in Japanese). Jpn Soc Fish Eng 42:151–157 (In Japanese with English abstract) Google Scholar
  41. Terrados J, Duarte C, Kamp-Nielsen L, Agawin NS, Gacia E, Lacap D, Fortes M (1999) Are seagrass growth and survival constrained by the reducing conditions of the sediment? Aquat Bot 65:175–197CrossRefGoogle Scholar
  42. Tsai CJ, Huang R, Lin WT, Wang HN (2014) Mechanical and cementitious characteristics of ground granulated blast furnace slag and basic oxygen furnace slag blended mortar. Mater Des 60:267–273CrossRefGoogle Scholar
  43. Whitehouse SJR, Bassoullet P, Dyer RK, Mitchener JH, Roberts W (2000) The influence of bedforms on flow and sediment transport over intertidal mudflats. Cont Shelf Res 20:1099–1124CrossRefGoogle Scholar
  44. Yamada H, Kayama M, Saito K, Hara M (1987) Suppression of phosphate liberation from sediment by using iron slag. Water Res 21:325–333CrossRefGoogle Scholar
  45. Yamamoto M, Fukushima M, Liu D (2012) The effect of humic substances on iron elution in the method of restoration of seaweed beds using steelmaking slag. ISIJ Int 52:1909–1913CrossRefGoogle Scholar
  46. Yano H, Nakai S, Okuda T, Nishijima W (2015) Sediment environment of an artificial tidal flat constructed using carbonated decarburization slag and dredged soil (in Japanese). Environ Sci 28:405–414Google Scholar
  47. Zhou Y, Liu X, Liu B, Liu P, Wang F, Zhang X, Yang H (2015) Unusual pattern in characteristics of the eelgrass Zostera marina L.in a shallow lagoon (Swan Lake), north China: implications on the importance of seagrass conservation. Aquat Bot 120:178–184CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Hitomi Yano
    • 1
  • Tetsuji Okuda
    • 2
  • Satoshi Nakai
    • 1
  • Wataru Nishijima
    • 2
  • Terumi Tanimoto
    • 3
  • Satoshi Asaoka
    • 4
  • Shinjiro Hayakawa
    • 1
  • Satoru Nakashima
    • 5
  1. 1.Faculty of EngineeringHiroshima UniversityHiroshimaJapan
  2. 2.Environmental Research and Management CenterHiroshima UniversityHiroshimaJapan
  3. 3.Institute of Geology and GeoinformationNational Institute of Advanced Industrial Science and TechnologyHiroshimaJapan
  4. 4.Research Center for Inland SeasKobe UniversityKobeJapan
  5. 5.Natural Science Center for Basic Research and Development Radioisotope CenterHiroshima UniversityHigashi-HiroshimaJapan

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