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Processes
Special Issues
Wastewater Treatment: Control, Removal and Separation Processes
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Wastewater Treatment: Control, Removal and Separation Processes

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 2273

Special Issue Editors

Prof. Dr. Choon Aun Ng

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Guest Editor
Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Kampar 31900, Perak, Malaysia
Interests: wastewater treatment; membrane bioreactor; soil microbe rehabilitation; waste to building materials
Prof. Dr. Mohammed J.K. Bashir

E-Mail Website
Guest Editor
Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Kampar 31900, Perak, Malaysia
Interests: water and wastewater treatment; emerging contaminants, waste management technology; water energy nexus; bioenergy; pollution control
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ping Zeng

E-Mail Website
Guest Editor
Department of Urban Water Environmental Research, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Interests: toxic substance; pollution control; bioaugmentation; MOFs; aerobic granules

Special Issue Information

Dear Colleagues,

The Special Issue “Wastewater Treatment: Control, Removal and Separation Processes” is currently open to submissions of original, high-quality research and review articles on modern biological, chemical and physical technologies used in wastewater treatment and management. Potential topics include (but are not limited to): 

  • Emerging contaminant identification and treatment.
  • Resource recovery from wastewater.
  • Advanced oxidation processes for wastewater treatment.
  • Biological wastewater treatment.
  • Advanced membrane technologies in wastewater treatment.
  • Adsorption removal of pollutant from wastewater.
  • Smart recycling and water reuse.
  • Nanotechnologies applications in wastewater treatment.
  • Application of machine learning for wastewater industries.
  • Coagulation and electrocoagulation of wastewater.
  • Electrochemical and bio-electrochemical treatment of wastewater.
  • Integrated system in treating wastewater.

Prof. Dr. Choon Aun Ng
Prof. Dr. Mohammed J.K. Bashir
Prof. Dr. Ping Zeng
Guest Editors

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. Processes 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 2400 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 treatment
  • separation processes
  • resource recovery
  • emerging contaminants
  • organic pollutants
  • heavy metals
  • adsorption
  • membrane
  • oxidation processes
  • biological processes

Published Papers (2 papers)

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Research

11 pages, 2296 KiB  
Article
Removal of Nano-Zinc Oxide (nZnO) from Simulated Waters by C/F/S—Focusing on the Role of Synthetic Coating, Organic Ligand, and Solution Chemistry
by Rizwan Khan, Muhammad Ali Inam, Ick Tae Yeom, Kang Hoon Lee and Kashif Hussain Mangi
Processes 2023, 11(9), 2604; https://doi.org/10.3390/pr11092604 - 31 Aug 2023
Viewed by 823
Abstract
Increased usage of nano-zinc oxide (nZnO) in different commercial fields has raised serious concerns regarding their discharge into the water streams containing natural and synthetic coating agents. Moreover, utilization of ground and surface water for drinking purposes is a common approach in many [...] Read more.
Increased usage of nano-zinc oxide (nZnO) in different commercial fields has raised serious concerns regarding their discharge into the water streams containing natural and synthetic coating agents. Moreover, utilization of ground and surface water for drinking purposes is a common approach in many countries. Therefore, the removal of nZnO particles from water is essential to minimize the risk to the environment. The present research investigated the removal of nZnO from complex water matrices by conventional coagulation-flocculation-sedimentation (C/F/S) process using polyaluminum chloride (PACl) as coagulants. The result showed that removal of uncoated nZnO through sedimentation was efficient in waters containing divalent cations in the absence of dissolved organic matter (DOM). For the water containing higher salt concentration, PACl coagulant showed better removal performance with increasing coagulant dosage; however, synthetic organic coating agent and DOM significantly decreased the removal up to 75%. The surface potential of studied waters indicated that the addition of PACl affects the charge potential of nZnO particles resulting in charge neutralization. The result of the particle size analyzer revealed the presence of smaller particles with size of 430 nm even after C/F/S process, which may increase the possibility of particles release into aquatic environment. The results of the present study may help in understating the removal behavior of other coated nanoparticles during conventional water treatment. Full article
(This article belongs to the Special Issue Wastewater Treatment: Control, Removal and Separation Processes)
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17 pages, 4534 KiB  
Article
Temperature–Electrokinetic Co-Driven Perfluorooctane Sulfonic Acid (PFOS) Adsorption on Geo-Adsorbents
by Yuzhou Yin, Yongping Shan, Dong Ma, Liuqing Yang, Mingxiu Zhan, Ping Liu, Benzhen Lou, Bo Zhang, Wentao Jiao and Lichu Yin
Processes 2023, 11(6), 1856; https://doi.org/10.3390/pr11061856 - 20 Jun 2023
Viewed by 949
Abstract
Per- and polyfluoroalkyl substances (PFAS) have concerned the public due to their worldwide distribution and the threat they pose to drinking water safety and human health. Temperature and DC field-induced electroosmotic flow (EOF) are powerful tools to regulate organic contaminant adsorption and control [...] Read more.
Per- and polyfluoroalkyl substances (PFAS) have concerned the public due to their worldwide distribution and the threat they pose to drinking water safety and human health. Temperature and DC field-induced electroosmotic flow (EOF) are powerful tools to regulate organic contaminant adsorption and control PFOS (as a typical PFAS) transport in porous media. However, the co-driven mechanisms of temperature–electrokinetic transport of contaminants are still unclear. Here, we investigated the synergistic mechanisms of temperature–electrokinetic co-driven PFOS adsorption on zeolite and activated carbon as model geo-adsorbents. We found that DC fields increased PFOS adsorption on activated carbon by up to 19.8%, while they decreased PFOS adsorption on zeolite by up to 21.4%. Increasing the temperature decreased the adsorption of PFOS by activated carbon and zeolite. The temperature and electrokinetic synergistically drive EOF velocity to control PFOS adsorption. Synergistic mechanisms of temperature–electrokinetic regulated kinetic and temperature-regulated thermodynamic (the Gibbs free energy change ΔG) and kinetic (liquid viscosity) under various temperatures and DC field situations were analyzed with models. A kinetic approach interlinking viscosity, EOF velocity, and the kinetic adsorption constants was established to interpret the synergistic mechanisms which can be further adopted to estimate temperature–electrokinetic induced PFOS adsorption benefits to mineral and carbonaceous adsorbents. We concluded that such kinetic regulation may provide support for controlling the transmission of PFOS. Full article
(This article belongs to the Special Issue Wastewater Treatment: Control, Removal and Separation Processes)
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