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.

随着城市化和工业化的加速，城市空气污染，特别是粉尘污染已成为全球性问题。控制灰尘问题的传统方法是用自来水喷洒道路。但是，这种方法不可避免地会导致水资源的巨大浪费。用再生水代替自来水进行除尘不仅可以达到减少粉尘和雾霾的效果，而且可以节约水资源。此外，节省下来的自来水可用于生产和生活，从而获得更多好处。为了量化洒水除尘的生态经济效益，提出了一种基于能值论的生态经济学定量方法。它用于计算各种水资源的成本，制冷和加湿效益，除尘和减少雾霾的好处，以及其他使用好处。以郑州2017年数据为例，结果表明，利用再生水控制扬尘的成本降低了54％。使用再生水的总收益约为使用自来水的1.30–1.80倍，净收益为4.65–7.17倍。因此，用再生水代替自来水来控制道路扬尘具有成本低和生态经济效益高的优点。本文提出的方法可以为在空气污染严重和水资源短缺的城市中推广使用再生水进行粉尘控制提供定量依据。结果表明，使用再生水控制粉尘的成本降低了54％。使用再生水的总收益约为使用自来水的1.30–1.80倍，净收益为4.65–7.17倍。因此，用再生水代替自来水来控制道路扬尘具有成本低和生态经济效益高的优点。本文提出的方法可以为在空气污染严重和水资源短缺的城市中推广使用再生水进行粉尘控制提供定量依据。结果表明，使用再生水控制粉尘的成本降低了54％。使用再生水的总收益约为使用自来水的1.30–1.80倍，净收益为4.65–7.17倍。因此，用再生水代替自来水来控制道路扬尘具有成本低和生态经济效益高的优点。本文提出的方法可以为在空气污染严重和水资源短缺的城市中推广使用再生水进行粉尘控制提供定量依据。用再生水代替自来水进行道路扬尘控制具有成本低，生态经济效益高的优点。本文提出的方法可以为在空气污染严重和水资源短缺的城市中推广使用再生水进行粉尘控制提供定量依据。用再生水代替自来水进行道路扬尘控制具有成本低，生态经济效益高的优点。本文所提出的方法可以为在空气污染严重，水资源短缺的城市中利用再生水进行粉尘治理提供定量依据。