Chitosan-Based Nanocomposite Beads for Drinking Water Production

3rd International Conference on Structural Nano Composites

材料科学;化学

Masheane, M.L.^1,2 ; Nthunya, L.N.^1,2 ; Sambaza, S.S.^2 ; Malinga, S.P.^2 ; Nxumalo, E.N.^1 ; Mamba, B.B.^1 ; Mhlanga, S.D.^1

Nanotechnology and Water Sustainability Research Unit, College of Science Engineering and Technology, University of South Africa, Florida, Johannesburg

1709, South Africa^1

Department of Applied Chemistry, DST, Mintek Nanotechnology Innovation Centre-Water Research Node, University of Johannesburg, P.O. Box 17011, Doornfontein

2028, South Africa^2

关键词: Alternative materials;    Beads;    Drinking water production;    Long term exposure;    Pharmaceutical industry;    Physico;    chemical parameters;    Rural community;    Water purification;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/195/1/012004/pdf
DOI  :  10.1088/1757-899X/195/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Potable drinking water is essential for the good health of humans and it is a critical feedstock in a variety of industries such as food and pharmaceutical industries. For the first time, chitosan-alumina/functionalised multiwalled carbon nanotube (f-MWCNT) nanocomposite beads were developed and investigated for the reduction of various physico-chemical parameters from water samples collected from open wells used for drinking purposes by a rural community in South Africa. The water samples were analysed before and after the reduction of the identified contaminants by the nanocomposite beads. The nanocomposite beads were effective in the removal of nitrate, chromium and other physico-chemical parameters. Although, the water samples contained these contaminants within the WHO and SANS241 limits for no risk, the long-term exposure and accumulation is an environmental and health concern. The reduction of these contaminants was dependent on pH levels. At lower pH, the reduction was significantly higher, up to 99.2% (SPC), 91.0% (DOC), 92.2% (DO), 92.2% (turbidity), 96.5% (nitrate) and 97.7% (chromium). Generally, the chitosan-alumina/f-MWCNT nanocomposite beads offer a promising alternative material for reduction and removal of various physico-chemical parameters for production portable water.