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Separations
Special Issues
New Approaches to Phosphorus Pollutant Control and Phosphorus Recovery
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New Approaches to Phosphorus Pollutant Control and Phosphorus Recovery

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Environmental Separations".

Deadline for manuscript submissions: 31 May 2026 | Viewed by 618

Special Issue Editor

Dr. Xuejiao Tang

E-Mail Website
Guest Editor
College of Environment Science and Engineering, Nankai University, Tianjin 300350, China
Interests: high value-added phosphorus recovery and purification

Special Issue Information

Dear Colleagues,

The natural environment is facing the threat of phosphorus compound pollution due to the use of pesticides and fertilizers and the discharge of domestic sewage, industrial wastewater, and exhaust gas. The recovery of phosphorus resources from the pollution source is one of the most attractive research fields, as phosphorus is an important active and non-renewable resource with a wide range of applications. The scope of this Special Issue includes, but is not limited to, the following: New approaches that can separate phosphorus compounds or their derivatives from the pollution source for subsequent high value-added resource utilization. In addition to extracting and concentrating phosphorus compounds, research on the biomineralization crystallization of guano stone and kyanite, as well as the anaerobic production and release of PH3 in domestic and industrial wastewater, is also particularly popular. In addition, research on new methods for utilizing high value-added resources and the related theoretical calculations, as well as new analytical methods and applications, is also welcome.

Therefore, it is my pleasure to invite you to contribute your research articles, communications, or reviews to this Special lssue dedicated to novel approaches to phosphorus pollutant control and phosphorus recovery.

Dr. Xuejiao Tang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Separations is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • phosphorus resource recovery
  • purification
  • crystallization separation
  • catalytic decomposition
  • high value-added

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Published Papers (1 paper)

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Research

20 pages, 6043 KB  
Article
Process Design and Optimisation Analysis for the Production of Ultra-High-Purity Phosphine
by Jingang Wang, Yu Liu, Jinyu Guo, Shuyue Zhou, Yawei Du and Xuejiao Tang
Separations 2025, 12(10), 274; https://doi.org/10.3390/separations12100274 - 9 Oct 2025
Viewed by 387
Abstract
With the increasing demand to scale the chip industry, attention is turning to the vital role that phosphanes and silanes play in semiconductor manufacturing processes such as chemical vapor deposition, plasma etching, and impurity doping. High-performance semiconductors often require a supply of ultra-pure [...] Read more.
With the increasing demand to scale the chip industry, attention is turning to the vital role that phosphanes and silanes play in semiconductor manufacturing processes such as chemical vapor deposition, plasma etching, and impurity doping. High-performance semiconductors often require a supply of ultra-pure gaseous phosphine (≥99.999%) to ensure the formation of defect-free thin-film structures with high integrity and strong functionality. In recent years, research on high-purity PH3 synthesis methods has mainly focused on two pathways: the acidic route with fewer side reactions, high by-product economics, and higher exergy of high-purity PH3, and the alkaline alternative with greater potential for practical application through lower reaction temperatures and a simpler reaction process. This paper presents the first comparative study and analysis on the preparation of ultra-high-purity PH3 and its process energy consumption. Using Aspen and its related software, the energy consumption and cost issues are discussed, and the process heat exchange network is established and optimised. By combining Aspen Plus V14 with MATLAB 2023, an artificial neural network (ANN) prediction model is established, and the parameters of the distillation section equipment are optimised through the NSGA-II model to solve problems such as low product yield and large equipment exergy loss. After optimisation, it can be found that in terms of energy consumption and cost indicators, the acidic process has greater advantages in large-scale production of high-purity PH3. The total energy consumption of the acidic process is 1.6 × 108 kJ/h, which is only one-third that of the alkaline process, while the cost of the heat exchange equipment is approximately three-quarters that of the alkaline process. Through dual-objective optimisation, the exergy loss of the acidic distillation part can be reduced by 1714.1 kW, and the economic cost can be reduced by USD 3673. Therefore, from the perspective of energy usage and equipment manufacturing, the comprehensive analysis of the acidic process has more advantages than that of the alkaline process. Full article
(This article belongs to the Special Issue New Approaches to Phosphorus Pollutant Control and Phosphorus Recovery)
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