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Advanced Treatment Technologies for Contaminants in Water

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

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 4362

Special Issue Editor

School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
Interests: advanced oxidation processes; electrochemical water treatment technology

Special Issue Information

Dear Colleagues,

Public health is closely related to the quality of the water environment, and water treatment technology is the key to ensuring the quality of the water environment. The rapid development of science and technology has led to large amounts of pollutants being discharged into the water environment. Nevertheless, the traditional water treatment technologies either are ineffective or require high energy input in removing some contaminants. In particular, the emerging contaminants with a low concentration, persistence, and bioaccumulative toxicity are resistant to traditional water treatment technologies, which causes a series of health and environmental problems (e.g., chronic diseases, adverse reproductive effect). Furthermore, the COVID-19 outbreak has increased the requirement for disinfection of pathogenic microorganisms in water to reduce the risk of disease transmission. Under the current requirement of reduced carbon emissions, efficient and energy-saving technologies for water treatment need to be developed. Hence, this Special Issue focuses on publishing advanced technologies for efficient and low-energy treatment of contaminants in water. Contents of interest related to treatment technologies include, but are not limited to, advanced oxidation/reduction processes, adsorption, membrane technologies, biological technologies, resource recovery technologies, advanced materials, and new reactors. Contaminants of interest include, but are not limited to, emerging contaminants, refractory organics, viruses, bacteria, and heavy metals. The objects of water treatment that are of interest include, but are not limited to, drinking water, surface water, municipal sewage, industrial wastewater, rainwater, and urine. 

Dr. Dong Li
Guest Editor

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Keywords

  • drinking water
  • municipal sewage
  • industrial wastewater
  • rainwater reuse
  • emerging contaminants
  • advanced environment materials
  • advanced technologies
  • disinfection
  • inorganic pollutants
  • resource recovery

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Published Papers (2 papers)

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Research

11 pages, 3235 KiB  
Article
Multivalent Effect of Defect Engineered Ag2S/g-C3N4 3D Porous Floating Catalyst with Enhanced Contaminant Removal Efficiency
by Nan Zhou, Yanzhang Li, Jie Chen, Mingxin Song and Linlin Zhang
Int. J. Environ. Res. Public Health 2023, 20(2), 1357; https://doi.org/10.3390/ijerph20021357 - 11 Jan 2023
Cited by 1 | Viewed by 1971
Abstract
Chlorophenols, as a major environmental pollutant, enter water systems through industrial wastewater, agricultural runoff and chemical spills, and they are stable, persistent under natural conditions, and highly hazardous to water resources. The objective of this article is to prepare Ag2S-modified C [...] Read more.
Chlorophenols, as a major environmental pollutant, enter water systems through industrial wastewater, agricultural runoff and chemical spills, and they are stable, persistent under natural conditions, and highly hazardous to water resources. The objective of this article is to prepare Ag2S-modified C3N4 three-dimensional network photocatalyst by calcination method to use photocatalysis as an efficient, safe, and environmentally friendly method to degrade chlorophenols. Ag2S/C3N4 has an excellent visible light absorption range, low band gap, effective separation of photogenerated charges, and active free radicals production, all of which make for the enhancement of photocatalytic degradation performance of the Ag2S/C3N4 system. Under the light irradiation (λ ≥ 420 nm), the photocatalytic degradation efficiency of 2,4,6-Trichlorophenol reach 95% within 150 min, and the stable photocatalytic degradation activity can still be maintained under different pH water environment and four degradation cycles. When Ag2S is loaded on ACNs, more photogenerated electrons are generated and subsequent reactions produce highly reactive groups such as •O2 and •OH that will originally be able to continuously attack TCP molecules to degrade pollutants. Therefore, this study shows that the photocatalyst provides a novel research approach for realizing the application in the field of pollutant degradation. Full article
(This article belongs to the Special Issue Advanced Treatment Technologies for Contaminants in Water)
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15 pages, 3555 KiB  
Article
Adsorption Characteristics of Phosphate Based on Al-Doped Waste Ceramsite: Batch and Column Experiments
by Yameng Ma, Jia Zhu, Jianghua Yu, Yicheng Fu, Chao Gong and Xiao Huang
Int. J. Environ. Res. Public Health 2023, 20(1), 671; https://doi.org/10.3390/ijerph20010671 - 30 Dec 2022
Cited by 1 | Viewed by 1931
Abstract
Phosphorus widely existing in rainfall and wastewater impacts the water environment. In this study, sludge, cement block, and coal fly ash were employed as ceramsite material to synthesize Al-doped waste ceramsite (Al-ceramsite) for removing phosphate (PO43−-P) from aqueous solutions. Batch [...] Read more.
Phosphorus widely existing in rainfall and wastewater impacts the water environment. In this study, sludge, cement block, and coal fly ash were employed as ceramsite material to synthesize Al-doped waste ceramsite (Al-ceramsite) for removing phosphate (PO43−-P) from aqueous solutions. Batch static adsorption–desorption experiments were designed to investigate the effect of various parameters such as Al-ceramsite dosage, PO43−-P concentration, temperature, initial pH, coexisting ions, and desorbents on the removal of PO43−-P. Also, the fate of PO43−-P removal efficiency in actual rainwater was studied through dynamic adsorption column experiments using Al-ceramsite. Results showed that Al-ceramsite could remove PO43−-P efficiently under the optimum parameters as follows: Al-ceramsite dosage of 40 g/L, initial PO43−-P concentration of 10 mg/L, temperature of 25 °C, and pH of 5. Besides that, the Al-ceramsite could completely remove PO43−-P in actual rainwater, and the effluent PO43−-P concentration was lower than the environmental quality standards for surface water Class Ⅰ (0.02 mg/L). The adsorption characteristics of Al-ceramsite on PO43−-P by X-ray photoelectron spectroscopy (XPS) were further explained. As a result, ligand exchange and complexation were confirmed as the main PO43−-P removal mechanism of Al-ceramsite. Thus, Al-ceramsite was prepared from industrial waste and has shown excellent potential for phosphorus removal in practical applications. Full article
(This article belongs to the Special Issue Advanced Treatment Technologies for Contaminants in Water)
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