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Water 2018, 10(2), 206;

Filtering Capability of Porous Asphalt Pavements

Laboratory of Energy Efficiency in Buildings, Department of Civil Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900, Brazil
Author to whom correspondence should be addressed.
Received: 11 January 2018 / Revised: 4 February 2018 / Accepted: 13 February 2018 / Published: 15 February 2018
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The objective of this study is to assess the filtering capability of porous asphalt pavement models and the quality of rainwater filtered by such models. Three slabs of porous asphalt mixtures and two models composed of porous layers that resulted in porous pavement structures were produced. Data were collected in two phases: using rainwater directly from the sky and then using stormwater runoff collected from a street. Parameters such as pH, dissolved oxygen, ammonia, phosphorus, nitrite, aluminium, chromium, copper, zinc, and iron were measured. For both rainwater and stormwater runoff quality analyses, there was an increase in the concentration of the following parameters: phosphorus, iron, aluminium, zinc, nitrite, chromium, copper, and pH; there was no significant variation in the concentration of dissolved oxygen; and there was a decrease in ammonia in one of the models. However, the concentrations of only phosphorus and aluminium exceeded the limits established by the Brazilian National Environmental Council and National Water Agency for the use of non-potable water. The models were capable of filtering rainwater and stormwater runoff, and reducing the concentration of ammonia. It can be concluded that it is possible to collect stormwater runoff from porous asphalt surfaces and porous asphalt pavements. Porous asphalt pavements are able to filter out certain pollutants from stormwater runoff and rainwater, and were shown to be an alternative to supply rainwater for non-potable uses and to recharge the water table. View Full-Text
Keywords: porous asphalt pavement; filtering; rainwater; stormwater; stormwater runoff porous asphalt pavement; filtering; rainwater; stormwater; stormwater runoff

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Padilha Thives, L.; Ghisi, E.; Gherardt Brecht, D.; Menegasso Pires, D. Filtering Capability of Porous Asphalt Pavements. Water 2018, 10, 206.

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