Year 2014, Volume 38 , Issue 2, Pages 248 - 255 2014-02-01

Treatment and recovery of contaminated railway ballast
Treatment and recovery of contaminated railway ballast

LUCA DI PALMA [1] , ELISABETTA PETRUCCI [2]


Experimental tests of metal extraction from stones sampled from artificially contaminated railway ballasts are presented and discussed. Metal extraction was performed by washing with aqueous solutions of disodium ethylenediaminetetraacetate (EDTA), at selected concentrations. The effectiveness of the remediation process was evaluated using leaching tests. The results indicate that the washing technology represents a successful and affordable solution for the implementation of an on-site treatment aimed at a reuse process. Adopting a 0.05 M EDTA solution, extraction yields in the range between 40% and 70% were achieved, depending on contact time and pH of the washing solution.
Experimental tests of metal extraction from stones sampled from artificially contaminated railway ballasts are presented and discussed. Metal extraction was performed by washing with aqueous solutions of disodium ethylenediaminetetraacetate (EDTA), at selected concentrations. The effectiveness of the remediation process was evaluated using leaching tests. The results indicate that the washing technology represents a successful and affordable solution for the implementation of an on-site treatment aimed at a reuse process. Adopting a 0.05 M EDTA solution, extraction yields in the range between 40% and 70% were achieved, depending on contact time and pH of the washing solution.
  • metal release is strongly influenced by pH and natural leaching by atmospheric precipitation occurs under slight to more acidic conditions [24], and this should be taken into account in evaluating the actual contamination of an operating ballast.
  • The results for both Type A and B samples show that at the end of the washing treatment, even using the 0.05 M EDTA solution, a substantial amount of metals remained adsorbed on the ballast; a higher extraction yield was observed for Cu from Type A samples (about 70%) and for Zn from Type B samples (about 41%).
  • Finally, TOC analyses of the leaching solution show that only a slight amount of EDTA remained adsorbed on the stone after the washing treatment; in particular after the 0.05 M EDTA treatment 53 mg L −1 and 15 mg L −1
  • TOC were measured for Type A and Type B samples, respectively, and 29 and 8 mg L −1
  • for the extractions performed at 0.01 M for Type A and Type B, respectively. In the view of a future optimization of the washing conditions, this should be taken into account and a final washing with water is required before reuse or disposal of the stones, as generally required after chelant-assisted washing of contaminated soil and sediments [19,25]. 4. Conclusions
  • In this paper experiments of metal extraction from railway ballasts are presented.
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Primary Language tr
Journal Section Articles
Authors

Author: LUCA DI PALMA

Author: ELISABETTA PETRUCCI

Dates

Publication Date : February 1, 2014

Bibtex @ { tbtkengineering145614, journal = {Turkish Journal of Engineering and Environmental Sciences}, issn = {1300-0160}, eissn = {1303-6157}, address = {}, publisher = {TUBITAK}, year = {2014}, volume = {38}, pages = {248 - 255}, doi = {10.3906/muh-1404-9}, title = {Treatment and recovery of contaminated railway ballast}, key = {cite}, author = {PALMA, LUCA DI and PETRUCCI, ELISABETTA} }
APA PALMA, L , PETRUCCI, E . (2014). Treatment and recovery of contaminated railway ballast. Turkish Journal of Engineering and Environmental Sciences , 38 (2) , 248-255 . DOI: 10.3906/muh-1404-9
MLA PALMA, L , PETRUCCI, E . "Treatment and recovery of contaminated railway ballast". Turkish Journal of Engineering and Environmental Sciences 38 (2014 ): 248-255 <https://dergipark.org.tr/en/pub/tbtkengineering/issue/12203/145614>
Chicago PALMA, L , PETRUCCI, E . "Treatment and recovery of contaminated railway ballast". Turkish Journal of Engineering and Environmental Sciences 38 (2014 ): 248-255
RIS TY - JOUR T1 - Treatment and recovery of contaminated railway ballast AU - LUCA DI PALMA , ELISABETTA PETRUCCI Y1 - 2014 PY - 2014 N1 - doi: 10.3906/muh-1404-9 DO - 10.3906/muh-1404-9 T2 - Turkish Journal of Engineering and Environmental Sciences JF - Journal JO - JOR SP - 248 EP - 255 VL - 38 IS - 2 SN - 1300-0160-1303-6157 M3 - doi: 10.3906/muh-1404-9 UR - https://doi.org/10.3906/muh-1404-9 Y2 - 2020 ER -
EndNote %0 Turkish Journal of Engineering and Environmental Sciences Treatment and recovery of contaminated railway ballast %A LUCA DI PALMA , ELISABETTA PETRUCCI %T Treatment and recovery of contaminated railway ballast %D 2014 %J Turkish Journal of Engineering and Environmental Sciences %P 1300-0160-1303-6157 %V 38 %N 2 %R doi: 10.3906/muh-1404-9 %U 10.3906/muh-1404-9
ISNAD PALMA, LUCA DI , PETRUCCI, ELISABETTA . "Treatment and recovery of contaminated railway ballast". Turkish Journal of Engineering and Environmental Sciences 38 / 2 (February 2014): 248-255 . https://doi.org/10.3906/muh-1404-9
AMA PALMA L , PETRUCCI E . Treatment and recovery of contaminated railway ballast. Turkish Journal of Engineering and Environmental Sciences. 2014; 38(2): 248-255.
Vancouver PALMA L , PETRUCCI E . Treatment and recovery of contaminated railway ballast. Turkish Journal of Engineering and Environmental Sciences. 2014; 38(2): 255-248.