| Title |
Optimization of phosphorus removal from agro-wastewater by iron desalinization treatment residue (Fe-DTR) |
| ID_Doc |
13766 |
| Authors |
Ganem, HE; Litaor, MI; Reichmann, O; Zohar, I |
| Title |
Optimization of phosphorus removal from agro-wastewater by iron desalinization treatment residue (Fe-DTR) |
| Year |
2023 |
| Published |
Journal Of Environmental Chemical Engineering, 11, 6 |
| DOI |
10.1016/j.jece.2023.111385 |
| Abstract |
Phosphorus (P) is a non-renewable nutrient that needs recycling. Cowshed wastewater is P-rich, though efficient P recycling is required. We aimed to optimize the chemical-physical process of loading P in cowshed wastewater onto iron desalinization treatment residue (Fe-DTR), while explaining the interactions involved. We investigated the impact of adsorbent dosage, particle size, pH, and temperature on P adsorption capacity and kinetics. The highest adsorption occurred at pH 3 and 25 C-degrees (11,410 +/- 1 mg P kg(-1) Fe-DTR) after 3 h, significantly surpassing adsorption at pH 7 and 40 C-degrees (10,834 +/- 371 mg P kg(-1) Fe-DTR), improving P capacity compared to Langmuir S-max of 7260 mg P kg(-1). A probabilistic model called Design of Experiment (DOE) suggested that combining low pH and high temperature could enhance P adsorption. Lower pH likely increased adsorption by removing competing ligands, and higher temperature has probably led to endothermic behavior, reducing solubility of calcium/iron phosphate phases. The pseudo-second-order model best described the adsorption rate. The activation energy indicated stronger bonds at pH 3 (8082 J mol(-1)) compared to pH 7 (3970 J mol(-1)). Hence, optimal conditions for P loading onto Fe-DTR at environment temperature are pH 3, particle size distribution of 45-90 mu m, solid/liquid ratio of 5 g L-1, and loading time of 3 h, though, three of four models we tested indicated two stage adsorption, including rapid initial adsorption (<90 min), followed by slower second-stage adsorption. This research showcases the circular economy concept by efficiently repurposing two distinct waste streams to generate a valuable resource for P fertilizers. |
| Author Keywords |
Phosphorus adsorption optimization; Kinetic models; Fe-desalinization treatment residual; Agro-wastewater; Phosphorus recycling |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001114519700001 |
| WoS Category |
Engineering, Environmental; Engineering, Chemical |
| Research Area |
Engineering |
| PDF |
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