Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 48, Issue 12, Pages 6867-6873Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es500415v
Keywords
-
Categories
Funding
- Natural Science Foundation of China [51378250, 51073077]
- Scientific Research Foundation of Graduate School of Nanjing University [2012CL06]
- Research and Innovation Project for Graduates of Jiangsu Province [CXZZ12_0034]
- Nanjing University
Ask authors/readers for more resources
Only few studies are available on bacteria removal efficiencies and antibacterial properties of flocculants, which is one of the important requirements in water treatment work. Escherichia coli (E. coli) was selected as an example of a Gram-negative bacteria for testing the flocculating properties of a quaternary ammonium salt grafted chitosan (carboxymethyl chitosangraft-poly[(2-methacryloyloxyethyl) trimethylammonium chloride] copolymer; i.e., CMC-g-PDMC). The effect of various flocculation parameters, including flocculant dosage, initial bacterial density, nutrient medium content, and pH were successively investigated. The experimental results indicated that, besides flocculation effects, CMC-g-PDMC also exhibited a bactericidal effect (not requiring additional treatment facilities). Moreover, the flocculation mechanisms were investigated via zeta potential measurements, floc observation, and three-dimensional excitation-emission matrix spectra analysis. Apart from its flocculating and settling effect, this chitosan-based material has bactericidal action through the breaking of bacterial cell walls by grafted quaternary ammonium salt.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available