Abstract
An adsorbent of bead type to remove arsenic (As) was developed by calcination of sodium alginate and polyvinyl alcohol containing a powder form of alum sludge. The adsorbent was evaluated in terms of adsorption kinetics, capacities in batch tests and by a column study. The calcination process created rough surface and increased the surface area of bead 100 times, which enhanced the adsorption kinetics of As onto the calcined adsorbent 3–21 times than un-calcined bead. However, the adsorption capacity decreased slightly compared to the un-calcined adsorbent. The column study showed similar adsorption capacity with commercial adsorbent and powder form of alum sludge considering the standard value of As for drinking water. The calcination process enhanced the adsorption kinetics of the adsorbent for As removal, one of major barrier of bead type adsorbent compared to powder type, which could reduce the bed volume of the reactor.
| Original language | English |
|---|---|
| Pages (from-to) | 181-188 |
| Number of pages | 8 |
| Journal | Journal of Environmental Management |
| Volume | 234 |
| DOIs | |
| State | Published - 2019.03.15 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 6 Clean Water and Sanitation
Keywords
- Adsorption kinetics
- Alginate bead
- Alum based adsorbent
- Calcination
- Column
Quacquarelli Symonds(QS) Subject Topics
- Environmental Sciences
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