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Water 2017, 9(3), 230; doi:10.3390/w9030230

Pilot Scale Testing of Adsorbent Amended Filters under High Hydraulic Loads for Highway Runoff in Cold Climates

Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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Academic Editor: Glenn Brown
Received: 2 January 2017 / Revised: 10 March 2017 / Accepted: 19 March 2017 / Published: 22 March 2017
(This article belongs to the Special Issue Additives in Stormwater Filters for Enhanced Pollutant Removal)
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Abstract

This paper presents an estimation of the service life of three filters composed of sand and three alternative adsorbents for stormwater treatment according to Norwegian water quality standards for receiving surface waters. The study conducted pilot scale column tests on three adsorbent amended filters for treatment of highway runoff in cold climates under high hydraulic loads. The objectives were to evaluate the effect of high hydraulic loads and the application of deicing salts on the performance of these filters. From previous theoretical and laboratory analysis granulated activated charcoal, pine bark, and granulated olivine were chosen as alternative adsorbent materials for the present test. Adsorption performance of the filters was evaluated vis-à-vis four commonly found hazardous metals (Cu, Pb, Ni and Zn) in stormwater. The results showed that the filters were able to pass water at high inflow rates while achieving high removal. Among the filters, the filters amended with olivine or pine bark provided the best performance both in short and long-term tests. The addition of NaCl (1 g/L) did not show any adverse impact on the desorption of already adsorbed metals, except for Ni removal by the charcoal amended filter, which was negatively impacted by the salt addition. The service life of the filters was found to be limited by zinc and copper, due to high concentrations observed in local urban runoff, combined with moderate affinity with the adsorbents. It was concluded that both the olivine and the pine bark amended filter should be tested in full-scale conditions. View Full-Text
Keywords: stormwater runoff; alternative adsorbents; pilot scale; hydraulic loading; adsorption; service life; toxic metal removal stormwater runoff; alternative adsorbents; pilot scale; hydraulic loading; adsorption; service life; toxic metal removal
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MDPI and ACS Style

Monrabal-Martinez, C.; Ilyas, A.; Muthanna, T.M. Pilot Scale Testing of Adsorbent Amended Filters under High Hydraulic Loads for Highway Runoff in Cold Climates. Water 2017, 9, 230.

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