Self-powered electro-coagulation system driven by a wind energy harvesting triboelectric nanogenerator for decentralized water treatment

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Many decentralized communities like rural communities of developing countries and remote communities, suffer from a scarcity of adequate water treatment because there is insufficient capital to construct relevant facilities, no experts to handle the required chemicals, insufficient electricity to operate them. Herein, we report a fully self-powered electro-coagulation (SPEC) system for de-centralized water treatment. For this, a triboelectric nanogenerator harvests ambient wind energy to provide the needed power. A simple electro-coagulation unit, composed of a simple pair of electrodes, successfully removes dissolved colloidal pollutants from water, while coagulating and precipitating pollutants, without any use of chemicals or an external power supply. The SPEC system removes 90% of algae and 97% of organic dye with self-powered treatment for 72 h. Due to its easy operation, and its low cost arising from its inherently simple structure, requirement for much smaller-scale facilities and low operating cost, the SPEC system could become a powerful candidate for appropriate water treatment in many regions lacking centralized water treatment. (C) 2016 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2016-10
Language
English
Article Type
Article
Citation

NANO ENERGY, v.28, pp.288 - 295

ISSN
2211-2855
DOI
10.1016/j.nanoen.2016.08.051
URI
http://hdl.handle.net/10203/214271
Appears in Collection
CBE-Journal Papers(저널논문)EE-Journal Papers(저널논문)
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