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Water
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Removal of Emerging Contaminants in Water
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Removal of Emerging Contaminants in Water

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (10 April 2024) | Viewed by 4177

Special Issue Editor

Dr. Chengmei Liao

E-Mail Website
Guest Editor
College of Environmental Science and Engineering, Nankai University, Tianjin, China
Interests: bioelectrochemical system; electroautotrophic microorganisms; biocathode sensor; sewage recycling; pollutant degradation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, with the accelerated rate of industrialization, in particular the rapid development of heavy chemical industries, some emerging contaminants (ECs) such as endocrine disruptors (EDs), pharmaceuticals and personal care products (PPCPs), perfluorinated compounds (PFCs), brominated flame retardants (BFRs), and disinfection byproducts (DBPs) have been continuously detected in water. These are highly toxic and difficult to manage, with strong insidiousness, long persistence and levels of high hazard, contituting important threats to the safety of water quality. To ensure water quality, many countries and regions have implmented screened lists of critical control ECs to meet specific water quality requirements and to enhance the operability of water quality testing. Therefore, as water usage continues to increase and use continues to expand, there is an urgent need to develop targeted and realistic deep wastewater treatment technologies that target ECs removal. In particular, the development of new technologies for EC degradation with clear high risk not only has the potential to significantly improve the EC treatment efficiency, but also reduce the EC load in the receiving water body, avoiding secondary pollution and endangering ecological and environmental safety.

Therefore, we invite researchers in relevant areas to the results and contributions of your work on emerging pollutant removal to this Special Issue, helping to better ensure water safety. Potential contributions may include, but are not limited to:

  1. Processes for emerging pollutant removal
  2. Various technologies driving pollutant transfer and transformation
  3. Material and energy exchange during contaminant degradation
  4. Key factors and strategies for contaminant removal
  5. Technologies for material transformation and energy recovery of contaminants

Dr. Chengmei Liao
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. 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

  • emerging contaminants
  • water safety
  • removal technology
  • pollutant degradation
  • material transformation and energy recovery

Published Papers (2 papers)

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Research

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15 pages, 3814 KiB  
Article
Piezo-Photocatalytic Degradation of Pharmaceuticals in Water Using Calcined Natural Sphalerite
by Svetlana Popova, Victoria Tazetdinova, Erzhena Pavlova, Galina Matafonova and Valeriy Batoev
Water 2023, 15(17), 3092; https://doi.org/10.3390/w15173092 - 29 Aug 2023
Cited by 1 | Viewed by 972
Abstract
This study is the first to report the high performance of calcined natural sphalerite as a heterogeneous catalyst (Catalyst) in the piezo- and photocatalytic degradation of pharmaceuticals (bezafibrate and ceftriaxone) using high-frequency ultrasound (US, 1.7 MHz) and ultraviolet-light-emitting diodes (LED, 365 nm). The [...] Read more.
This study is the first to report the high performance of calcined natural sphalerite as a heterogeneous catalyst (Catalyst) in the piezo- and photocatalytic degradation of pharmaceuticals (bezafibrate and ceftriaxone) using high-frequency ultrasound (US, 1.7 MHz) and ultraviolet-light-emitting diodes (LED, 365 nm). The kinetic comparison showed that piezo-photocatalysis (LED + US + Catalyst) was more efficient than photocatalysis (LED + Catalyst) for degrading both contaminants in deionized water as well as in surface river water at natural pH (7.9). Despite reducing degradation rates (~1.7 times) in river water due to the scavenging effect of its constituents, ceftriaxone and bezafibrate were degraded by 77% and 48% after 1 h of exposure, respectively. Adding H2O2 increased the corresponding pseudo-first-order rate constants, and the complete degradation of ceftriaxone was achieved. However, the contribution of ultrasound at a given intensity was hidden, which resulted in a similar performance of piezo-photocatalysis and photocatalysis for treating river water. No pronounced synergy between the piezo- and photocatalytic processes was observed in the experimental conditions used. Nevertheless, the H2O2-assisted piezo-photocatalysis using high-frequency US, LED, and natural catalysts can be considered a novel and effective strategy for eliminating pharmaceuticals from real water without pH adjustment. Full article
(This article belongs to the Special Issue Removal of Emerging Contaminants in Water)
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Review

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19 pages, 1671 KiB  
Review
Occurrence and Removal of Pharmaceutical Contaminants in Urine: A Review
by Xiaolin Li, Bin Wang, Feng Liu and Gang Yu
Water 2023, 15(8), 1517; https://doi.org/10.3390/w15081517 - 13 Apr 2023
Cited by 4 | Viewed by 2843
Abstract
With the development of world economies and the continuous improvement of living standards, pharmaceutical and personal care products (PPCPs) have attracted significant attention because of their widespread detection in wastewater and the natural environment. Their biological toxicity, environmental persistence, and other hazardous characteristics [...] Read more.
With the development of world economies and the continuous improvement of living standards, pharmaceutical and personal care products (PPCPs) have attracted significant attention because of their widespread detection in wastewater and the natural environment. Their biological toxicity, environmental persistence, and other hazardous characteristics might pose a threat to the ecological environment and human health. How to treat source-separated urine as a valuable recyclable resource has become a novel challenge. In this review, we briefly described the sources of pharmaceuticals, explored the various metabolic pathways of pharmaceuticals, and concluded that urinary excretion is the primary metabolic pathway of pharmaceuticals. Next, the current status of pharmaceutical contamination in human urine, sewage plants, and surface water was summarized. It is shown that the concentration of pharmaceuticals in human urine is usually 2–3 orders of magnitude higher than that in sewage plants and surface water. Then, the research progress of various technologies to treat pharmaceutical contaminants in urine was analyzed and compared, indicating the promise of advanced oxidation technologies to treat such wastewater, among which electrochemical oxidation has received widespread attention due to its advantages of cleanness, flexibility, and controllability. Therefore, the research progress of electrode materials and electrochemical technology to treat urine was reviewed, and finally, the future development direction was proposed, namely, coupling membrane treatment technology with intellectual development, which will help realize the scale and industrialization of source-separated urine treatment. Full article
(This article belongs to the Special Issue Removal of Emerging Contaminants in Water)
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