Fly ash amended pervious concrete: a laboratory study on removal potential for inorganic contaminants
by Ryan R. Otter; Brian Bachner; Spring Nolin; Jessie Weatherly; Heather J. Brown; John P. DiVincenzo
International Journal of Environmental Engineering (IJEE), Vol. 8, No. 1, 2016

Abstract: Pervious concrete is a recognised best management practice. This study investigated the removal efficiencies of various pervious concrete formulations when exposed to total suspended solids, Pb²⁺, Cl⁻, SO₄²⁻, NO₃⁻, and PO₄³⁻ via simulated rainfall events. The results showed substantial total suspended solids, Pb²⁺, and PO₄³⁻ removal. Removal rates as high as 72%, 36%, and 43% were observed for PO₄³⁻, Pb²⁺, and total suspended solids, respectively. Removal efficiencies of total suspended solids, Cl⁻, SO₄²⁻, and NO₃⁻ were not largely influenced by formulation. However, both Pb²⁺ and PO₄³⁻ removal were formulation dependent. Analysis of the void space in each individual pervious concrete cylinder was performed and compared to removal efficiency data. Surprisingly, no significant relationship existed between removal of potential contaminants and void space. Pervious concrete can aid in improving water quality of urban runoff.

Online publication date: Tue, 09-Aug-2016

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