Advanced Technologies in Sustainable Wastewater Treatment and Water Reuse

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 1252

Special Issue Editors


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Guest Editor
Faculty of Engineering and Applied Science, Queen’s University, Kingston, ON, Canada
Interests: water and wastewater treatment; harmful algal bloom; emerging contaminants; environmental impact assessment and risk management; synchrotron-radiation-based techniques and environmental applications
Special Issues, Collections and Topics in MDPI journals
Department of Civil Engineering, Memorial University, St. John's, NL, Canada
Interests: photocatalytic oxidation; nanomaterials; energy recovery from water and wastewater treatment; emerging contaminants; system design
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent decades, the occurrence of a huge amount of newly identified compounds of anthropogenic or natural origin in the aquatic environment has become a global issue. These contaminants typically occur in trace concentrations in the range from parts per trillion (ppt or ng/L) to parts per billion (ppb or μg/L). These compounds are named as “emerging contaminants (ECs)”. The elevation of ECs such as pharmaceuticals and personal care products (PPCPs), pesticides, flame retardants (e.g., PBDE, PFAS/PFOA/PFOS), microplastics, and antibiotic-resistant genes can pose a chronic risk to ecosystem and human health. Conventional water treatment processes such as coagulation/flocculation, sedimentation, filtration, biodegradation, and disinfection can remove naturally occurring contaminants (e.g., pathogens, cyanotoxins, arsenic, fluorine, heavy metals) but may not be able to remove ECs. Therefore, advanced technologies are required to address emerging issues.

Advanced technologies, such as advanced oxidation processes (AOPs), new-material-based adsorption, membrane filtration, and biofiltration, have recently been applied as tertiary treatment to improve water quality in wastewater and reduce the potential risk to the environment. These processes are usually carried out with expensive, sophisticated systems, or assume high energy and chemical consumption, which hinder their wide and sustainable applications for water reuse. The sustainability of advanced wastewater treatment technologies has been improved by the application of novel materials, improvements in system designs, as well as the reduction of energy and chemical consumption. For example, engineering nanomaterials offer exceptional catalytic, optical, electrical, adsorptive, and antimicrobial properties through control over material size, morphology, and structure. These features allow the development of materials with high selectivity, efficiency, and reliability not only for water purification but also energy and chemical reduction. These materials and technologies that utilize renewable or low-grade energy would enhance the sustainability and cost-effectiveness of wastewater treatment and offer high capacity and flexibility to treat challenging emerging issues.

This Special Issue targets the development of advanced materials and technologies, novel systems for reaction intensification, system simplification, and high energy and chemical efficiency for wastewater treatment and reuse. We are also interested in manuscripts exploring process mechanisms, the progress made in analytical methodologies for advanced materials, mechanisms of novel treatment technologies, and their applications in wastewater treatment plants and water reuse.

Dr. Xiaying Xin
Dr. Bo Liu
Guest Editors

Manuscript Submission Information

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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. Water 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 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

  • new materials
  • nanotechnology
  • wastewater treatment
  • emerging contaminants
  • water reuse

Published Papers (1 paper)

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Research

22 pages, 4319 KiB  
Article
Efficient and Low-Cost Water Remediation for Chitosan Derived from Shrimp Waste, an Ecofriendly Material: Kinetics Modeling, Response Surface Methodology Optimization, and Mechanism
by Kheira Benazouz, Nasma Bouchelkia, Ali Imessaoudene, Jean-Claude Bollinger, Abdeltif Amrane, Aymen Amine Assadi, Hicham Zeghioud and Lotfi Mouni
Water 2023, 15(21), 3728; https://doi.org/10.3390/w15213728 - 25 Oct 2023
Viewed by 962
Abstract
The hydrothermal production of chitosan from the carapaces of gray shrimp was carried out, and the obtained material was characterized via X-ray diffraction analysis, infrared spectroscopy, and pH zero-charge point, giving the expected results. Orange G dye adsorption onto synthetized chitosan was investigated [...] Read more.
The hydrothermal production of chitosan from the carapaces of gray shrimp was carried out, and the obtained material was characterized via X-ray diffraction analysis, infrared spectroscopy, and pH zero-charge point, giving the expected results. Orange G dye adsorption onto synthetized chitosan was investigated in a batch system, the kinetic study was well-described by a nonlinearized pseudo-second-order model, and the equilibrium data indicated that the nonlinear Langmuir form was appropriate to describe the adsorption system with a maximum adsorption capacity of 34.63 mg/g compared with that found experimentally of 31.9 mg/g. The influences of most of the operating parameters, such as pH, adsorbent concentration, temperature, initial dye concentration, and contact time, were studied. These five independent variables acting on the adsorption performance of Orange G were selected for optimization and modeling processes through a central rotating composite design using response surface methodology (RSM). The percentage of removal of Orange G by chitosan prepared from shrimp shells was predicted with a second-degree polynomial equation, and the postulated model was valid and represented well the phenomenon studied in the experimental domain, with an R2 = 0.98 and an RAdj = 0.95. An initial Orange G concentration of 10 mg/L, a pH of 6.5, a chitosan amount of 0.3 g/L, a temperature of 25 °C, and an adsorption time of 450 min were found to be the optimum conditions in batch mode for the maximum uptake of Orange G (removal of 97.43%). Full article
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