Removal and recovery of phosphonates from wastewater via adsorption

Altaf, Rubina; Sun, Bo; Lü, Huijie; Zhao, He-Ping; Liu, Dezhao

doi:10.1080/10643389.2022.2115271

Cited by 10 publications

(6 citation statements)

References 114 publications

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“…Surprisingly, Ca 2+ at alkaline conditions facilitates P o conversion to P i but shows little influence under acidic conditions. NTMP shares six p K a of <0, 1.5, 4.6, 5.9, 7.3, and 14.2. , Under alkaline conditions, NTMP is more deprotonated and offers a high complexing ability toward Ca 2+ . This phenomenon must affect hydroxyl radicals’ reaction rate with NTMP.…”

Section: Resultsmentioning

confidence: 98%

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Efficient Treatment of Phosphonate-Laden Wastewater by CaO₂/UV: Partial Oxidation, Complexation, and Coprecipitation

Zhang,

Song,

Zhan

et al. 2024

ACS EST Water

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Unlike the case for inorganic phosphate (Pi), removing organic phosphorus (Po) is more challenging. Conventional methods for removing Po involve a two-step route, where Po is first converted to Pi by an advanced oxidation process, followed by subsequent chemical precipitation/coagulation. Here, we propose a one-step CaO2/UV method for simultaneous conversion and coprecipitation of phosphonates, a representative type of organic phosphorus compound. We discovered that the total P removal (82.0%) is much higher than the conversion efficiency of Po to Pi (26.7%) under a dose of 1.5 mM CaO2 and 4 h UV irradiation for nitrilotris-methylene phosphonic acid (NTMP) treatment, providing new directions for treating Po compounds without completely breaking down the molecular structure. We further found that a CaO2/Po molar ratio of 1.5 is ideal for inducing the partial breakdown of the NTMP structure, Ca-phosphate formation, and coprecipitation of NTMP and its degradation intermediates. Beyond that, we noted that the presence of Ca2+ enhances the reactivity of NTMP with hydroxyl radicals, as supported by the improved conversion efficiency of Po to Pi, i.e., 37.4% vs 9.1% under pH i 11. We also demonstrated the preliminary feasibility of the CaO2/UV system in treating the reverse osmosis concentrate. Our study offers a robust one-step approach and sheds new insights on the synergistic role of partial oxidation, complexation, and coprecipitation in dealing with phosphonate-laden wastewater.

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Section: Resultsmentioning

confidence: 98%

“…NTMP shares six pK a of <0, 1.5, 4.6, 5.9, 7.3, and 14.2. 54,55 Under alkaline conditions, NTMP is more deprotonated and offers a high complexing ability toward Ca 2+ . This phenomenon must affect hydroxyl radicals' reaction rate with NTMP.…”

Section: Removing Tp Does Not Require a Completementioning

confidence: 99%

Efficient Treatment of Phosphonate-Laden Wastewater by CaO₂/UV: Partial Oxidation, Complexation, and Coprecipitation

Zhang,

Song,

Zhan

et al. 2024

ACS EST Water

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“…Adsorption is an ideal method for phosphorus removal from rural domestic sewage due to its low cost, high efficiency, and ease of operation (Altaf et al, 2023). It also offers the benefit of efficient phosphorus recovery from the wastewater (Fang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Study on the removal efficacy and mechanism of phosphorus from wastewater by eggshell‐modified biochar

Xu,

Li,

Sumita

et al. 2024

Water Environment Research

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The excessive discharge of phosphorus from rural domestic sewage is a problem that worthy of attention. If the phosphorus in the sewage were recovered, addressing this issue could significantly contribute to mitigating the global phosphorus crisis. In this study, corn straw, a common agricultural waste, was co‐pyrolytically modified with eggshells, a type of food waste from university cafeterias. The resulting product, referred to as corn straw eggshell biochar (EGBC) was characterized using SEM, XRD, XPS, XRF, and other methods. Batch adsorption experiments were conducted to determine the optimal preparation conditions of EGBC and to explore its adsorption characteristics. EGBC showed strong adsorption effectiveness within a pH range of 5–12. The adsorption isotherm closely followed the Sips model (R2 > 0.9011), and the adsorption kinetics were more consistent with the pseudo‐second‐order model (R2 > 0.9899). The process was found to be both spontaneous and endothermic. Under optimal conditions, the phosphorus adsorption capacity of EGBC was measured to be 288.83 mg/g. This demonstrates the high efficiency of EGBC for phosphorus removal and illustrates an effective method of utilizing food waste for environmental remediation.Practitioner Points Biochar prepared from waste eggshell was used to removal and recovery phosphorus in wastewater treatment. EGBC has an impressive adsorption capacity that can reach up to 288.83 mg/g. EGBC has excellent adsorption and filtration capabilities, and there is a sudden increase in concentration at 900 min in the breakthrough curve of EGBC. EGBC has good regeneration performance, with an adsorption effect of 65% and an adsorption capacity of 121 mg/g after four desorption and regeneration cycles.

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“…However, retrieval of adsorption materials may present challenges, but these challenges can be mitigated by incorporating magnetic materials to enhance the retrieval of the adsorbent. Magnetic properties being added to adsorbents make them both convenient and e cient to recycle and reuse, thus making magnets for recycling a growing trend [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

One-Step Preparation of Indole-Based Porous Magnetic Composite via Cation-π Interaction-Driven and -Induced Strategy

Mao,

Zhu,

Zhang

et al. 2024

Preprint

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A strategy driven and induced by cation-π interaction was employed to obtain magnetic porous composite material with a uniform dispersion of ferroferric oxide (Fe3O4). Ferroferric oxide/indole-based porous composite (Fe3O4/PIN) was prepared in a one-step process. Cation-π interaction dispersed iron ions (Fe3+) next to the indole groups in the indole-based porous polymer (PIN), and subsequently, after the in-situ reaction, Fe3O4 was uniformly distributed around the indole groups within PIN. At 298 K, Fe3O4/PIN displayed remarkable adsorption effectiveness, attaining 290.697 mg/g, and within 1 hour, had achieved 74% of the highest capacity. In addition, due to the excellent magnetic properties of Fe3O4/PIN, it exhibited rapid recovery characteristics for TNT. Despite five cycles of adsorption-desorption, with acetone as the eluent, the adsorption capacity of Fe3O4/PIN for TNT still remains at 90% of its highest potential. Hence, Fe3O4/PIN is anticipated to serve as an effective adsorbent for TNT. The uniform distribution of Fe3O4 in porous materials through the driving and inducing effects of cation-π is an unprecedented innovation, providing a new perspective and approach for the preparation and application of similar composite materials.

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Removal and recovery of phosphonates from wastewater via adsorption

Cited by 10 publications

References 114 publications

Efficient Treatment of Phosphonate-Laden Wastewater by CaO₂/UV: Partial Oxidation, Complexation, and Coprecipitation

Efficient Treatment of Phosphonate-Laden Wastewater by CaO₂/UV: Partial Oxidation, Complexation, and Coprecipitation

Study on the removal efficacy and mechanism of phosphorus from wastewater by eggshell‐modified biochar

One-Step Preparation of Indole-Based Porous Magnetic Composite via Cation-π Interaction-Driven and -Induced Strategy

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Removal and recovery of phosphonates from wastewater via adsorption

Cited by 10 publications

References 114 publications

Efficient Treatment of Phosphonate-Laden Wastewater by CaO2/UV: Partial Oxidation, Complexation, and Coprecipitation

Efficient Treatment of Phosphonate-Laden Wastewater by CaO2/UV: Partial Oxidation, Complexation, and Coprecipitation

Study on the removal efficacy and mechanism of phosphorus from wastewater by eggshell‐modified biochar

One-Step Preparation of Indole-Based Porous Magnetic Composite via Cation-π Interaction-Driven and -Induced Strategy

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Product

Resources

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Efficient Treatment of Phosphonate-Laden Wastewater by CaO₂/UV: Partial Oxidation, Complexation, and Coprecipitation

Efficient Treatment of Phosphonate-Laden Wastewater by CaO₂/UV: Partial Oxidation, Complexation, and Coprecipitation