Removal of Rhodamine B from aqueous solutions using coffee residual
Coffee residual (CR) was coated with iron oxide to remove Rhodamine B (RhB) in aqueous solution. There has been little research into eliminating RhB with CR coated with iron oxide. Thus, the optimal conditions and adsorption process for removing RhB were discovered. The optimal conditions for removi...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-04-01
|
| Series: | Desalination and Water Treatment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625002048 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Coffee residual (CR) was coated with iron oxide to remove Rhodamine B (RhB) in aqueous solution. There has been little research into eliminating RhB with CR coated with iron oxide. Thus, the optimal conditions and adsorption process for removing RhB were discovered. The optimal conditions for removing RhB was determined. The ideal parameters observed were: RhB concentration = 20 mg/L, reaction duration = 4 hours, adsorbent dosage = 0.1 g, and temperature = 45℃. According to the isothermal adsorption equation, RhB adsorption onto CR@Fe3O4 takes place in both mono and multi layers. The RhB adsorption process in aqueous solution employing CR@Fe3O4 was better suited for the pseudo-second-order model, indicating that chemisorption regulated the adsorption process. The maximum adsorption capacity was 64.94 mg/g, which is higher than that of an agricultural waste adsorbent treated just with chemicals. These results clearly show that CR coated with iron oxide performs better as an RhB adsorbent than agricultural byproducts chemically treated. However, the adsorbent created has a lower maximum adsorption capacity than biochar thus suggesting further study is required to develop technology for an adsorbent with a higher adsorption capacity. |
|---|---|
| ISSN: | 1944-3986 |