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Molecules
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Separation Technology of Wastewater Purification Membrane
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Separation Technology of Wastewater Purification Membrane

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Cross-Field Chemistry".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2416

Special Issue Editor

Prof. Dr. Hou Wang

E-Mail Website
Guest Editor
College of Environmental Science and Technology, Hunan University, Hunan, China
Interests: photocatalysis; nanomaterials; organic synthesis; water treatment; membrane separation

Special Issue Information

Dear Colleague,

Wastewater treatment and water regeneration is critical to alleviate water shortages and water pollution. In recent years, separation processes, especially membrane separation, including, but not limited to, micro-/ultra-/nano-filtration, reverse osmosis, electroosmosis, pervaporation, and distillation, have attracted more and more attentions, because of their simple operation, low energy consumption, environmental protection, and high separation efficiency. Membrane processes are used in many fields, such as drinking water purification, seawater desalination, and urban and industrial wastewater treatment, and are even applied in biomedicine and food fields. Purification membranes can separate various pollutants in wastewater, including heavy metal ions, drugs, dyes, and other pollutants. Researche on new membrane materials and membrane pollution control has also aroused widespread interest in topics such as carbon nanotube materials, graphene oxide materials, metal–organic framework membranes, covalent organic framework membranes, and various composite membranes, in order to obtain hydrophilic, anti-fouling, high flux, and high rejection membrane materials. The aim of this Special Issue is to collect original research papers and review articles focused on all of the above-mentioned aspects of wastewater purification membranes.

Prof. Dr. Hou Wang
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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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

  • Wastewater purification
  • Membrane separation
  • Pollutants
  • Application
  • Material synthesis
  • Membrane pollution

Published Papers (1 paper)

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Research

21 pages, 3139 KiB  
Article
Phragmites australis (Reed) as an Efficient, Eco-Friendly Adsorbent for Brackish Water Pre-Treatment in Reverse Osmosis: A Kinetic Study
by Abeer El Shahawy, Inas A. Ahmed, Rabab Wagdy, Ahmed H. Ragab and Nasser H. Shalaby
Molecules 2021, 26(19), 6016; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26196016 - 03 Oct 2021
Cited by 4 | Viewed by 2032
Abstract
A cost-effective adsorbent was prepared by carbonization of pre-treated Phragmites australis reed at 500 °C. Phragmites australis was characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) surface analyses. [...] Read more.
A cost-effective adsorbent was prepared by carbonization of pre-treated Phragmites australis reed at 500 °C. Phragmites australis was characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) surface analyses. XRD of the as-prepared adsorbent exhibited a partially crystalline structure with a specific surface area of 211.6 m2/g and an average pore diameter of 4.2 nm. The biosorption potential of novel biosorbent Phragmites australis reed was investigated with a batch scale and continuous flow study. The study was conducted at different constraints to obtain optimum pH conditions, adsorbent dose, contact time, agitation speed, and initial TDS concentration. In order to analyze the properties of the procedure and determine the amount of sodium removal, Langmuir, Freundlich, and Dubinin–Radushkevich isotherms were tested. The optimal values of contact time, pH, and adsorbent dose were found to be 150 min, 4, and 10 g/L, respectively, with an agitation speed of 300 rpm at room temperature (27 °C). The three tested isotherms show that the adsorption of Na+ onto the prepared adsorbent is a hybrid process from physi- and chemisorption. For industrial application, the adsorbent was tested using the adsorbent column technique. Pseudo-first-order, pseudo-second-order, and diffusion models were connected, and it was discovered that the information fit best to the pseudo-second-arrange active model. According to the intraparticle diffusion model, the mechanism goes through four stages before reaching equilibrium. The periodicity test shows that the adsorption ability of Phragmites australis can be recovered by washing with 0.1 M HCl. Full article
(This article belongs to the Special Issue Separation Technology of Wastewater Purification Membrane)
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