Nanotechnology-Enabled Water Technologies for a Sustainable Future

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 2961

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Guest Editor
Sarkeys Energy Center, The University of Oklahoma, 100 East Boyd St., Room T301, Norman, OK 73019, USA
Interests: water-energy-environment nexus; separation science; membrane technologies; functional nanomaterials; nanoconfinement; interfacial phenomena; guest-host interaction; electrochemical processes; sustainability; decarbonization
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Special Issue Information

Dear Colleagues,

Water is vital. Sustainably closing the water loop via technological breakthroughs with corresponding social acceptance is a critical development toward building global sustainability and resilient societies. The need to augment freshwater with unconventional water resources has urged scientists to seek solutions from first-principles innovations. Nanomaterials and their intriguing physicochemical properties have emerged at the nanoscale and enabled a broad range of phenomena and applications. Recent advances in controlled fabrication and characterization of materials at the nanoscale allow for creative designs of functional materials with effective nanostructure and chemistry. Furthermore, they provide effective tools to unravel transport mechanisms of molecules across heterophasic interfaces, which is crucial for the development of next-generation solutions for water remediation at lower energetic and environmental costs. Encountered challenges, however, often involve high costs, complicated processes, and poor scalability, lifetime performance, and life-cycle assessment when translating these nanomaterials into macroscale structures for practical applications in realistically complex chemical environments. To address these, the interdisciplinary bridging of nanotechnology, material science, separation science, environmental science, engineering, advanced manufacturing, and social science toward the sustainable deployment of novel nanomaterials for water security is crucial.

In this Special Issue, we seek technical and review articles that essentially address diverse facets of the applications of nanomaterials in advancing sustainable water treatment, reuse, and resource recovery. These aspects may include, but are not limited to, the simulations, syntheses, characterization, structure–property relationships, transport phenomena, applications, technoeconomic analyses, biological reactivity, nanotoxicity, fate and transport, life-cycle assessment, environmental risks, and public perception of nanomaterials when they are exploited to address global water challenges.

Dr. Ngoc T. Bui
Guest Editor

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Keywords

  • decarbonization and sustainability
  • water treatment and reuse
  • water and brine management
  • desalination and deionization
  • treatment technologies for emerging contaminants
  • advanced separations
  • engineered nanomaterials
  • nanocomposite membranes
  • nanoscale channels
  • nanoconfinement

Published Papers (1 paper)

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Research

16 pages, 3443 KiB  
Article
Effects of Stepwise Adjustment of C/N during the Start-Up of Submerged Membrane Bioreactors (SMBRs) on the Aerobic Denitrification of Wastewater
by Yinan Zhang, Yuxin Fang, Banglong Wang, Hangjun Zhang and Jiafeng Ding
Water 2021, 13(22), 3251; https://0-doi-org.brum.beds.ac.uk/10.3390/w13223251 - 17 Nov 2021
Cited by 7 | Viewed by 2406
Abstract
Based on the improved high-efficiency sewage treatment performance of submerged membrane bioreactors (SMBRs), we focused on how to adjust the C/N ratio of the influent water during reactor start-up to prevent an excessive C/N ratio from causing membrane fouling. In this study, an [...] Read more.
Based on the improved high-efficiency sewage treatment performance of submerged membrane bioreactors (SMBRs), we focused on how to adjust the C/N ratio of the influent water during reactor start-up to prevent an excessive C/N ratio from causing membrane fouling. In this study, an experimental method of gradually adjusting the influent C/N ratio to quickly start the reactor was proposed, and the results showed that biofilm formation in R1 (SMBR, three influent C/N ratios of 5, 10, and 20) was approximately completed in 32 days, shorter than that (40 days) required in R2 (SMBR, influent C/N ratio of 20). Higher removal efficiencies of 76.4% for TN, 70.1% for COD, and 79.2% for NH3-N were obtained in R1 than in R2. The high-throughput sequencing results indicated that after 150 days of operation, the Shannon index of bacteria in R1 increased from 2.97 to 4.41 and the growth of Nakamurella, Ferruginibacter, and Rhodanobacter was promoted in the reactor, which indicated substantial microbial diversity in the biofilm. Therefore, gradually adjusting the influent C/N ratio could effectively enhance the nitrogen removal performance of denitrification microbial communities in SMBRs. This study offers a reliable approach for starting the SMBR-enhanced biological nutrient removal process in wastewater treatment plants by gradually adjusting the influent C/N ratio. Full article
(This article belongs to the Special Issue Nanotechnology-Enabled Water Technologies for a Sustainable Future)
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