Abstract
With the acceleration of urbanization and industrialization, urban air pollution, especially dust pollution, has become a global problem. The traditional method to control dust problem is to spray roads with tap water. However, this method will inevitably lead to a huge waste of water resources. Using reclaimed water instead of tap water for dust control can not only achieve the same effect of reducing dust and haze, but also save water resources. In addition, the saved tap water can be used for production and life, thereby obtaining additional benefits. In order to quantify the eco-economic benefits of sprinkling water for dust control, a quantitative method was proposed based on the emergy theory of ecological economics. It was used to calculate the cost of different water resources, the cooling and humidifying benefit, the dust control and haze reduction benefit, and the other use benefit. Taking the 2017 data of Zhengzhou as an example, the results indicated that the cost of using reclaimed water to control dust was reduced by 54%. The total benefit of using reclaimed water was about 1.30–1.80 times that of using tap water, and the net benefit was 4.65–7.17 times. Therefore, the use of reclaimed water instead of tap water for road dust control has advantages of low cost and high eco-economic benefits. The method proposed in this paper can provide quantitative basis for the popularization of using reclaimed water to dust control in cities with serious air pollution and water resource shortage.
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Acknowledgements
This research was funded by the National Natural Science Foundation of China (No. NSCF- 51609216) and Henan natural science foundation (No. 182300410139). The authors are grateful to colleagues and friends who shared their meteorological and hydrological data with us. We also thank the reviewers for insightful comments that improved an earlier version of this manuscript.
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Lv, C., Zhang, W., Ling, M. et al. Quantitative analysis of eco-economic benefits of reclaimed water for controlling urban dust. Environ Geochem Health 42, 2963–2973 (2020). https://doi.org/10.1007/s10653-020-00537-y
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DOI: https://doi.org/10.1007/s10653-020-00537-y