E2.05 Tesfai 2018 ReNUWIt Annual Meeting Poster
Abstract/Contents
- Abstract
- Nowadays more than 2.5 billion of the world’s population is living in water stressed areas, having lack of basic levels of fresh water for at least one month every year. The expansion of urban centers in terms of size and number of settlers makes the situation more challenging. This phenomenon leads to the need of advanced treatment technologies on alternative water sources to fulfill the escalating demand. Consequently, membrane processes such as osmosis (RO), nano-filtration (NF), and electrodialysis (ED) gain importance to treat and produce high-quality water from seawater, brackish water, and wastewater. ED, an electro-driven process that uses cation and anion exchange membranes to desalinate water, is favored for its adjustable selectivity, energy efficiency and higher water recovery as compared to pressure-driven membrane processes. Same as other membrane processes, membrane fouling and scaling affects ED operation. Though many studies have been conducted to minimize fouling, there is still a gap in the technology. This study aims to reduce the costs of treating alternative waters by developing antifouling anion-exchange membranes (AEM). Polydopamine (PDA) was used to modify surface of normal grade AEMs (AR204) for coating TiO nanoparticles or graphene oxide nanosheets as an adhesive, anti-microbial surface layer to enhance ED performance. Results from bench-scale ED experiments, contact angle, and coupon scale testing using E.coli as a major foulant showed surface modification of AEM improved biofouling resistance, hydrophilicity, permselectivity and overall salt removal efficiency.
Description
| Type of resource | other |
|---|---|
| Date created | May 2018 |
Creators/Contributors
| Author | Tesfai, Million |
|---|---|
| Author | Ma, Guanyu |
| Author | Wang, Huiyao |
| Author | Xu, Pei |
Subjects
| Subject | Re-inventing the Nation’s Urban Water Infrastructure |
|---|---|
| Subject | ReNUWIt |
| Subject | E2.05 |
| Subject | Efficient Engineered Systems |
| Subject | Energy and resource recovery |
| Subject | New Mexico |
Bibliographic information
Access conditions
- Use and reproduction
- User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
- License
- This work is licensed under an Open Data Commons Attribution License v1.0.
Preferred citation
- Preferred Citation
- Tesfai, Million and Ma, Guanyu and Wang, Huiyao and Xu, Pei. (2018). E2.05 Tesfai 2018 ReNUWIt Annual Meeting Poster. Stanford Digital Repository. Available at: https://purl.stanford.edu/jz166db0490
Collection
Re-inventing the Nation's Urban Water Infrastructure (ReNUWIt)
View other items in this collection in SearchWorksContact information
- Contact
- pxu@nmsu.edu
Also listed in
Loading usage metrics...