Optimizing Adsorbent with Porous Concrete Nanoparticles to Reduce the Pollution Load of Urban Runoff Using Taguchi Method

Water is a vital substance for human and water supply has become a crisis in many arid countries. Due to arid and semi-arid climate of Iran, it has many challenges to supply fresh water. According to the urgent need for water and also the lack of water resources, it is a nessessity to implement the water management programs like recycle and reuse of runoffs in order to meet the water needs in agriculture and green space. Nowadays, use of concrete porous pavements in urban paths is increased significantly, and it can be used to reduce water pollution. Due to the usefulness of different adsorbents in reducing pollution, in this study the effect of replacing pumice, scria, zeolite and travertine adsorbents with volume percentages of 25, 50, 75 and 100% and metal sulfide nanoparticles with 1, 2, 3 and 4% with porous concrete aggregates on qualitative parameters in runoff have been investigated by Taguchi method. Experiments related to physical properties were performed in the concrete technology laboratory as well as tests related to qualitative parameters in the chemistry laboratory. In this study, three parameters of additive, volume percentage of additive and metal sulfide nanoparticles have been used. Finally, using Minitab and Excel software, the parameters and the effect of each of them in reducing pollution were investigated. The results showed that the greatest impact on reduction of pollution was the percentage of additive, type of additive and volume of nanoparticles, respectively. Finally, as a proposed concrete mix design that has the highest effect on pollution elimination, 75% of the volume fraction and 1% of the nanoparticle can be introduced.