Phosphorus Recovery System from Desorbing and Regenerating Solution Used to Regenerate Phosphorus Adsorption Capacity of Hydrotalcite

Oshima, Hisamitsu; Kuwabara, Tomoyuki; Sato, Takaya; Kawamoto, Ariumi

doi:10.2965/jswe.30.191

Cited by 2 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11,12 It has been reported that monophosphate is removed into LDH and LDH is reused using a "two-step regeneration system". 13 The uptake of pyrophosphate, a cause of eutrophication, was examined in chloride-type CaFe-LDH. 14 Dissolution of LDH provided Ca-contained Fe hydroxide and soluble Ca 2+ , to which pyrophosphate was caused surface capture and precipitation, respectively.…”

Section: Figure 1 Scheme Of This Workmentioning

confidence: 99%

Uptake and Release of Sodium Diphosphate by a Chloride-Type Layered Double Hydroxide

Hayashi

Otsu

Kamiji

et al. 2022

Phosphorus Research Bulletin

View full text Add to dashboard Cite

In this study, we investigated the uptake and release of sodium diphosphate (Na4P2O7, P2) by a chloride-type layered double hydroxide (LDH-Cl) with good anion exchange properties. The pH of the P2 aqueous solution produced the strongest effect on the P2 uptake. At pH 5, the maximum uptake was 1.9 mmol/g (LDH-P2(1.9)), and the minimum uptake amount obtained at pH 11 was 0.8 mmol/g (LDH-P2(0.8)). The maximum release rate of P2 determined for LDH-P2(0.8) in a NaCl aqueous solution at a NaCl(aq) concentration of 4 M, temperature of 24 °C, and reaction time of 1 h was 12%. After repeating the release process four times under these conditions, the cumulative P2 release rate increased to 22%. Meanwhile, the cumulative release rate of P2 in a Na2CO3 aqueous solution determined for LDH-P2(0.8) was 90%, which exceeded the value obtained for the NaCl aqueous solution.

show abstract