| dc.creator |
Mirwan, Agus |
|
| dc.date.accessioned |
2020-06-29T07:59:46Z |
|
| dc.date.available |
2020-06-29T07:59:46Z |
|
| dc.identifier |
http://eprints.ulm.ac.id/9774/1/10_1007_s11356-020-08922-x.pdf |
|
| dc.identifier |
Mirwan, Agus Aluminum leaching from water treatment sludge using hydrochloric acid and kinetic study. Environmental Science and Pollution Research. |
|
| dc.identifier.uri |
https://repo-dosen.ulm.ac.id//handle/123456789/16795 |
|
| dc.description |
Abstract
Water treatment sludge (WTS) is abundantly produced in the world; the waste contributes to the environmental problems.
Therefore, for WTS utilization, aluminum leaching was employed using hydrochloric acid in this study. Al leaching efficiency
increased from 72% to 80% as hydrochloric acid concentration increased from 1 to 4 M. Decreasing the particle size and
increasing the temperature increased Al leaching efficiency. The proposed kinetic model revealed that the rate-controlling step
followed a series of two leaching mechanisms: initially controlled by product-layer diffusion and then by a chemically controlled
reaction. For instance, at 70 °C, the initial stage is well fitted by product-layer diffusion (R2 = 0.87) compared to R2 = 0.60 for
chemical reaction; while for the second stage, R2 = 0.95 was observed via chemical reaction compared to R2 = 0.74 for productlayer diffusion. The activation energies in these two stages were 9.58 kJ/mol and 10.73 kJ/mol, respectively. The proposed model
was well validated by using data from literature and thus will be useful for other applications of leaching and extraction processes.
Keywords Waste . Environmental problem . Mechanism . Model . Chemical surface . Diffusion . Removal |
|
| dc.format |
text |
|
| dc.relation |
https://link.springer.com/article/10.1007/s11356-020-08922-x?wt_mc=Internal.Event.1.SEM.ArticleAuthorOnlineFirst&utm_source=ArticleAuthorOnlineFirst&utm_medium=email&utm_content=AA_en_06082018&ArticleAuthorOnlineFirst_20200430 |
|
| dc.relation |
http://eprints.ulm.ac.id/9774/ |
|
| dc.subject |
QD Chemistry |
|
| dc.title |
Aluminum leaching from water treatment sludge using hydrochloric acid and kinetic study |
|
| dc.type |
Article |
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| dc.type |
PeerReviewed |
|