| Title |
Usage of phosphoric acid plant's circulate pond waters in struvite precipitation-Effect of conditions |
| ID_Doc |
7884 |
| Authors |
Tuomikoski, S; Sauvola, E; Riponiemi, M; Lassi, U; Pesonen, J |
| Title |
Usage of phosphoric acid plant's circulate pond waters in struvite precipitation-Effect of conditions |
| Year |
2023 |
| Published |
Water And Environment Journal, 37, 3 |
| DOI |
10.1111/wej.12848 |
| Abstract |
Struvite is a suitable fertilizer, and electrochemical precipitation of nutrients from industrial waters provides one answer to the circular economy. Molar ratio between ammonium and phosphate is crucial: Water suitable for the precipitation includes more or at least the same amount ammonium than phosphate. That kind of water typically does not exist in industry. Therefore, ammonium-rich industrial water was mixed with phosphorus-rich water to obtain a suitable molar ratio for struvite precipitation. Parameters were studied to determine their effect on removal-% and struvite yield. 100% struvite yield was obtained under several conditions even without pH control with pH 7-9. The highest phosphate removal (99.7%) was occurred with the molar ratio 1.7:2:1 for Mg:NH4:PO4 (pH 9.0). Waters dilution prevents magnesium anode corrosion. Formed struvite has potential as recycled fertilizer due to low bioavailability of metals and high leachability of nutrients studied by four-stage sequential leaching. |
| Author Keywords |
ammonium; electrochemical precipitation; phosphate; pond water; struvite |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000921435100001 |
| WoS Category |
Environmental Sciences; Limnology; Water Resources |
| Research Area |
Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources |
| PDF |
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