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The Wastewater: Treatment and Remediation

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Environmental Science and Engineering".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 2381

Special Issue Editor


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Guest Editor
College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Interests: adsorption; kinetics; surface adsorption; photocatalysis; heterogeneous catalysis; Nanomaterials; catalyst characterization; catalyst synthesis; environmental chemistry; catalysis

Special Issue Information

Dear Colleagues,

We are organizing a Special Issue on the treatment and remediation of wastewater in the International Journal of Environmental Research and Public Health. This is a peer-reviewed scientific journal that publishes articles and communications in the interdisciplinary area of environmental health sciences and public health. For detailed information on the journal, we refer you to https://www.mdpi.com/journal/ijerph.

Wastewater pollution problems are becoming more severe because of increased industrialization, urbanization, and human population, as well as having indirect consequences on the overall ecosystem. The removal of hazardous constituents from wastewater involves a combination of physical, chemical, and biological approaches. As the conventional methods used in wastewater treatment are limited and their associated operational and capital costs are high, this Special Issue is open to any subject area related to wastewater treatment and remediation via novel and efficient technologies, such as advanced oxidation processes, photocatalysis, electro-catalysis, microwave catalysis, and adsorption. The listed keywords suggest just a few of the many possibilities. 

Dr. Yanping Zhu
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. International Journal of Environmental Research and Public Health 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 2500 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

  • advanced oxidation process
  • photocatalysis
  • electro-catalysis
  • microwave catalysis
  • adsorption
  • organic contaminant
  • inorganic contaminant

Published Papers (1 paper)

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Research

13 pages, 1331 KiB  
Article
Removal of Toxic Metals from Sewage Sludge by Acid Hydrolysis Coupled with EDTA Washing in a Closed-Loop Process
by Juan Francisco Morales Arteaga, Mojca Zupanc, Matevž Dular, Domen Lestan and Anela Kaurin
Int. J. Environ. Res. Public Health 2023, 20(3), 2544; https://doi.org/10.3390/ijerph20032544 - 31 Jan 2023
Cited by 2 | Viewed by 2063
Abstract
Contamination with toxic metals prevents the use of sewage sludge (SS) as a soil fertilizer. Hydrodynamic cavitation, thermal microwaving, microwave-assisted alkaline, and acid hydrolysis coupled with ethylenediaminetetraacetate (EDTA) washing were tested as a method to remove toxic metals from SS. Acid hydrolysis coupled [...] Read more.
Contamination with toxic metals prevents the use of sewage sludge (SS) as a soil fertilizer. Hydrodynamic cavitation, thermal microwaving, microwave-assisted alkaline, and acid hydrolysis coupled with ethylenediaminetetraacetate (EDTA) washing were tested as a method to remove toxic metals from SS. Acid hydrolysis coupled with EDTA washing was most effective and was used in a closed-loop process based on ReSoil technology. EDTA and process solutions were recycled at a pH gradient of 12.5–2, which was imposed by the addition of quicklime (CaO) and H2SO4. An average of 78%-Pb, 76%-Zn, 1%-Cu, and 17%-Cr were removed from SS in five consecutive batches. No wastewater was generated, only solid waste (40%). The EDTA lost in the process (42%) was resupplied in each batch. In a series of batches, the process solutions retained metal removal efficiency and quality. The treatment removed 70% and 23% of P and N, respectively, from SS and increased the leachability of Zn, Cu, Mn, and Fe in the washed SS by 11.7, 6.8, 1.4, and 5.2 times, respectively. Acid hydrolysis coupled with EDTA washing proved to be a technically feasible, closed-loop process but needs further development to reduce reagent, material, and nutrient loss and to reduce toxic emissions from the washed sludge. Full article
(This article belongs to the Special Issue The Wastewater: Treatment and Remediation)
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