| dc.creator |
Yakubu, Yahaya |
|
| dc.creator |
Zhou, Jun |
|
| dc.creator |
Shu, Zhu |
|
| dc.creator |
Tan, Yigen |
|
| dc.creator |
Zhao, Zhengliang |
|
| dc.creator |
Mbululo, Yassin |
|
| dc.date |
2021-05-19T17:50:48Z |
|
| dc.date |
2021-05-19T17:50:48Z |
|
| dc.date |
2018 |
|
| dc.date.accessioned |
2022-10-25T08:51:20Z |
|
| dc.date.available |
2022-10-25T08:51:20Z |
|
| dc.identifier |
https://www.suaire.sua.ac.tz/handle/123456789/3540 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/91272 |
|
| dc.description |
Journal Article |
|
| dc.description |
This study sought to establish the effectiveness of water washing pre-treatment on the quality of municipal solid waste incineration
(MSWI) fly ash (FA) for reuse and solidification or stabilization (S/S). Initial analysis of the FA sample shows that it did not meet
the USEPA-1311 toxicity characteristic leaching procedure (TCLP) regulatory limits of 2011. As a result, a two-stage water washing
process was carried out an attempt to improve the quality of the MSWI FA. After the washing pre-treatment, the heavy metals in
the FA sample met the regulatory limits, thereby making it non-toxic for reuse or safe disposal. The leachate from the washing
process also passed regulatory standards of China (GB 8978 – 1996) and the 2011 USEPA-1311. The washing process successfully
removed more than 98% of each heavy metal under study. The process was excellent at removing cadmium (99.99%) and very good
at removing the rest of the heavy metals. The 28-day compressive strength increased as the quantity of FA decreased. Also, all the
heavy metals in the samples prepared with the pre-treated FA met the USEPA-1311 TCLP regulatory limit for reuse and safe disposal.
The heavy metals leachability and compressive strength tests showed that the effect of cement-based S/S was largely influenced by its
quantity in the samples. The highest compressive strength was attained by using 55% of the FA as replacement for cement. However,
FA replacements of up 70% also yielded good results that met the 1989 USEPA standard of 0.34 MPa (50 psi) |
|
| dc.format |
application/pdf |
|
| dc.language |
en |
|
| dc.subject |
Fly ash |
|
| dc.subject |
hazardous waste |
|
| dc.subject |
heavy metal |
|
| dc.subject |
municipal solid waste |
|
| dc.subject |
reuse |
|
| dc.subject |
solidification/stabilization |
|
| dc.title |
Potential industrial utilization of pre-treated municipal solid waste incineration fly ash |
|
| dc.type |
Article |
|