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Water
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Water Quality and Purification
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Water Quality and Purification

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

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 1140

Special Issue Editors

Prof. Dr. Bo Sun

E-Mail Website
Guest Editor
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao 266237, China
Interests: physicochemical processes including disinfection processes and redox processes; chlorine chemistry; control of micropollutants; solid–liquid separation processes; advanced oxidation processes
Special Issues, Collections and Topics in MDPI journals
Dr. Hongyu Dong

E-Mail Website
Guest Editor
Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
Interests: advanced oxidation processes; sulfite-based oxidation process; application of reactive metal species in water and wastewater treatment; application of chemiluminescence in environmental area; coagulation–flocculation
Special Issues, Collections and Topics in MDPI journals
Dr. Juanshan Du

E-Mail Website
Guest Editor
Division of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
Interests: environmental ice (photo)chemistry; AOPs for water treatment; zero valent iron technology for water remediation; environmental (photo)chemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Water distinguishes our planet from all other planets we are currently aware of. However, the deterioration of water quality presently taking place means we might be unable to meet both current and foreseeable water demands. There are many regions where available freshwater is inadequate to meet human drinking water and sanitation needs, thus constraining human health and economic development as well as the maintenance of a clean environment and healthy ecosystems. All those involved in research must find ways to remove these constraints. How best to meet these challenges requires research in all aspects of water quality and purification. This Special Issue aims to better understand the current status of water quality, develop strategies to sustain this vital resource, and create a more desirable future. Original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • All aspects of emerging organic contaminants (e.g., pharmaceutical and personal care products, pesticides, perfluorinated compounds, persistent organic pollutants, endocrine disruptors, and other industrial chemicals) in water;
  • All aspects of trace metals and metalloids (e.g., arsenic, selenium) in water;
  • Drinking water treatment;
  • Wastewater treatment;
  • Potable and non-potable water reuse.

You may choose our Joint Special Issue in IJERPH.

Prof. Dr. Bo Sun
Dr. Hongyu Dong
Dr. Juanshan Du
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. 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

  • water treatment
  • wastewater treatment
  • water reuse
  • emerging organic contaminants
  • metals
  • metalloids
  • water quality

Published Papers (1 paper)

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Research

16 pages, 1646 KiB  
Article
Upflow Direct Filtration and Downflow Direct Filtration: A Comparison with Emphasis on the Removal of Aerobic Spore-Forming Bacteria and Fluorescent Microspheres as Surrogates for Cryptosporidium Oocyst Removal
by Álef Luan de Souza Pereira, Cristina Celia Silveira Brandão, Yovanka Pérez Ginoris and Carla Patrícia Pereira Alves
Water 2023, 15(22), 4012; https://doi.org/10.3390/w15224012 - 19 Nov 2023
Viewed by 938
Abstract
Monitoring the removal of Cryptosporidium oocysts in water treatment plants is a challenge, particularly in developing countries, and the use of surrogates has proven necessary. Two surrogates already investigated and recognized by the scientific community are aerobic spore-forming bacteria (ASFB) and fluorescent polystyrene [...] Read more.
Monitoring the removal of Cryptosporidium oocysts in water treatment plants is a challenge, particularly in developing countries, and the use of surrogates has proven necessary. Two surrogates already investigated and recognized by the scientific community are aerobic spore-forming bacteria (ASFB) and fluorescent polystyrene microspheres (ME). In this context, this study evaluates and compares the performance of upflow direct filtration and downflow direct filtration, with emphasis on the removal of ASFB and ME as a surrogate of Cryptosporidium oocyst removal. Pilot filtration experiments were carried out with low turbidity Paranoá Lake water (average—3.7 NTU) with ASFB varying from 7 × 102 to 5.5 × 103 CFU/100 mL. In some experiments, water was spiked with microspheres, aiming for 105 ME/L. Two operational conditions were evaluated: (1) filters operating with the same filtration rate (5 m/h); (2) filters operating with the same flow rate of 59.41 L/h. In general, the downflow filter presented a slightly higher removal efficiency than the upflow filter but the differences were not considered statistically significant in most cases. The removal efficiency of microspheres (3 to 5 log) was higher than that of ASFB (1.2 to 4 log) in both filters, corroborating that the removal of ASFB is a conservative surrogate of the removal of Cryptosporidium. Full article
(This article belongs to the Special Issue Water Quality and Purification)
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