Special Issue "Advanced Technologies to Remove Toxic Compounds in Wastewater"
A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Engineering, Remediation and Restoration".
Deadline for manuscript submissions: 31 March 2022.
Special Issue Editor
Interests: bioremediation; biofilm bioreactor; composting; biosurfactants; hydrocarbons; emerging pollutants
Special Issue Information
Dear Colleagues,
Wastewater contains numerous pollutants that typically cannot be removed by conventional treatment methods. The entry of these wastewaters into the ecosystem causes serious damage as a result of the toxic effects of these compounds. This is intensified by the fact that continuous and prolonged discharges often take place, producing chronic toxicity. The toxicity of wastewater is due to the presence of both the macro-contaminants—namely the high content of dissolved organic matter or the nitrogen pollution—and micro-pollutants—such as heavy metals, micro and nano-plastics and emerging contaminants. The complex chemical composition of wastewater necessitates the implementation of combined and new technologies to achieve efficient removal of their toxicity and the development of a valuable toxicity assessment index. In particular, it should be noted that water from wastewater treatment plants is nowadays considered a sustainable water resource. The aim of this Special Issue is to provide updated and specialized information about the efficacy of advanced technologies which are valuable in the removal of wastewater toxicity to upgrade the efficiency of conventional wastewater treatments. It is hoped that this Special Issue will encourage the establishment of discussion forums to analyze in depth the importance of pollutants and optimal means of achieving high-quality water for reuse.
Prof. Dr. Conceptión Calvo
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 papers will be 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. Toxics 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 1600 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
- organic matter
- nitrogen
- emerging pollutants
- heavy metals
- micro and macro plastics
- oxidative technologies
- sorption technologies
- bioreactor technologies
- toxicity index
Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Removal of carbon nanotubes from aqueous solutions by hypochlorite sodium: effects of treatment conditions
Authors: Mei Yang, Toshiya Okazaki and Minfang Zhang
Affiliation: National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
Abstract: The treatment of carbon nanotubes (CNTs) containing wastewater has become to an important issue with the increase of industrial application due to the concerns from potential risk of CNTs to the environment and human health. However, no standard guideline for treatment of the wastewater containing CNTs has been established at this moment. Recently, we have proposed a method to remove CNTs from aqueous dispersions by using sodium hypochlorite (NaClO). For practical application of this method, in this study, we investigated the influence of various conditions, such as reaction temperature, NaClO concentration, CNT concentration and pH value to the CNT-degradation rates. The results showed that the degradation of CNTs depends strongly on the temperature, and NaClO concentration. The higher temperature and higher NaClO concentration had faster degradation-rates of CNTs. The rational temperature and the concentration of NaClO are suggested to be 50-70oC and 2-3 % (g/g). Lower pH condition accelerated the elimination speed but induced the toxic chlorine and hypochlorite gases during the reaction. Furthermore, the dispersant or other substance in the solution would also consume NaClO, thus affecting the degradation rate. These findings would be of significance to establishing a standard technique for CNT-containing industrial wastewater treatment and then advancing the environmental sustainability of the CNT industry.