Effect of process parameters on phosphorus conversion pathways during hydrothermal treatment of sewage sludge: A review

Tangredi, Antonello; Barca, Cristian; Ferrasse, Jean‐Henry; Boutin, Olivier

doi:10.1016/j.cej.2023.142342

Cited by 20 publications

(4 citation statements)

References 127 publications

(427 reference statements)

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“…>453 K, inorganic phosphorus present in the liquid phase undergoes a reaction with metal ions released from the biomass. This reaction leads to the formation of metalassociated phosphorus or insoluble phosphate that becomes loaded onto the hydrochar [56,57].…”

Section: Hydrothermal Carbonizationmentioning

confidence: 99%

“…For instance, the hydrothermal temperature can affect the degree and rate of degradation of macromolecular organic matter in the precursor. This degradation process produces acidic substances like organic acids and phenolic compounds, which decrease the pH and promote the transformation from AIP to non-apatite inorganic NAIP and from OP to IP [57,59]. As the hydrothermal temperature continues to rise, the degradation products further decompose, leading to the generation of alkaline substances such as ammonium ions.…”

Section: Hydrothermal Carbonizationmentioning

confidence: 99%

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A Review on the Removal of Heavy Metals from Water by Phosphorus-Enriched Biochar

Zeng,

Lin,

et al. 2024

Minerals

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In recent years, the utilization of phosphorus-enriched biochar (PBC) has attracted significant attention due to its exceptional stability and surface reactivity. This review systematically summarizes the advancements in research related to the application of PBC as an adsorbent for remediating water contaminated with heavy metals. Initially, the precursors utilized in the production of PBC, encompassing biomass and phosphorus sources, are introduced. Subsequently, the distinct physicochemical properties and adsorption characteristics resulting from phosphorus doping on the biochar surface through various carbonization processes and parameters are elucidated. Additionally, the diverse adsorption mechanisms employed by PBC in removing heavy metals from water are analyzed. Lastly, future research prospects and associated challenges concerning PBC are presented. This paper aims to furnish comprehensive background information for the practical implementation of PBC in the purification of heavy metal-contaminated water environments.

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Section: Hydrothermal Carbonizationmentioning

confidence: 99%

Section: Hydrothermal Carbonizationmentioning

confidence: 99%

A Review on the Removal of Heavy Metals from Water by Phosphorus-Enriched Biochar

Zeng,

Lin,

et al. 2024

Minerals

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Section: Introductionmentioning

confidence: 99%

“…Upon incineration, sewage sludge is significantly dwindled in volume, and those toxic organics are nearly eliminated . Importantly, all organic and inorganic P are converted into orthophosphate forms, , leading to an enhancement of P content (from 4 to 11.9%) in the obtained SSIA and thereby facilitating subsequent recovery. , Currently, various wet-chemical SSIA extraction processes have been developed for P recovery; however, the unavoidable release of intrinsic adverse metals, such as heavy metals, indeed toughens the downstream separation of P with them. In addition, time-consuming trials for extractant screening and dosage determination hamper large-scale practice, although diverse extractants including strong inorganic acids , and bases , and organic acids , have been employed in bench scales to attain relatively satisfactory performances of P extraction from SSIA.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Stimulated Molecular Interfaces for Augmented Electron Delocalization in Wet-Chemical Phosphorus Recovery from Incineration Ash of Sewage Sludge

Liang,

Li,

Fang

et al. 2024

Environ. Sci. Technol.

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Wet-chemically recovering phosphorus (P) from sewage sludge incineration ash (SSIA) has already become a global initiative to address P deficit, but effectively isolating P from these accompanying metals (AMs) through adsorption in a SSIA-derived extract remains elusive. Here, we devised a hydrothermal stimulusmotivated thermodynamic and kinetic enhancement to gain anionic ethylenediaminetetraacetic acid (EDTA) molecular interfaces for AM enclosure to resolve this conundrum. A new dosage rule based on the EDTA coordination ratio with AMs was established for the first time. Upon hydrothermal extraction at 140 °C for 1 h, the P extraction efficiency reached 96.7% or higher for these obtained SSIA samples, and then exceptional P sequestration from these EDTA-chelated AMs was realized by the peculiar lanthanum (La)-based nanoadsorbent (having 188.86 mg P/g adsorbent at pH ∼ 3.0). Relevant theoretical calculations unraveled that these delocalized electrons of tetravalent EDTA molecules boosted the enclosure of liberated AMs, thereby entailing a substantially increased negative adsorption energy (−408.7 kcal/mol) of P in the form of H 2 PO 4 − through intruding lattice-edged carbonates to coordinate La with monodentate mononuclear over LaCO 5 (1 0 1). This work highlights the prospect of molecular adaptation of these common extractants in wet-chemical P recovery from various P-included wastes, further sustaining global P circularity.

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Phosphorus Recovery from Sewage Sludge Digestate and Pig Manure by Hydrothermal Treatments

Tangredi,

Ochoa,

Boutin

et al. 2024

Lecture Notes in Civil Engineering

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Effect of process parameters on phosphorus conversion pathways during hydrothermal treatment of sewage sludge: A review

Cited by 20 publications

References 127 publications

A Review on the Removal of Heavy Metals from Water by Phosphorus-Enriched Biochar

A Review on the Removal of Heavy Metals from Water by Phosphorus-Enriched Biochar

Hydrothermally Stimulated Molecular Interfaces for Augmented Electron Delocalization in Wet-Chemical Phosphorus Recovery from Incineration Ash of Sewage Sludge

Phosphorus Recovery from Sewage Sludge Digestate and Pig Manure by Hydrothermal Treatments

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