Study on Percolation for Treating Dissolved Pollutants in Highway Runoff

Abstract:

Although the concentration of highway runoff’s contaminants is low, highway runoff still have potential risks to the surrounding environment due to the accumulation effect. Infiltration system is a common method to control highway runoff pollution; therefore, this paper used Zn²⁺, P and petroleum that are typical dissolved pollutant in runoff as the target pollutants to investigate the effect of different filter materials removing highway runoff pollutants. The result shows that river sand’s removal effect is better than zeolite, in the experimental period, the efficiency of the river sand column removing Zn²⁺ was higher than 95%, and removal efficiency for Zn²⁺ of the zeolite column was higher than 90% at the first three days’ supply of Zn²⁺ solution, then gradually decreased. Adding a small amount of gravel was appropriate to help increase their infiltrate rate under high removal efficiency, the infiltrate rate of packed column reached 4 mm • min^-1 when its mass ratio of river sand and gravel is 2:1, and its effect on the removal of pollutants was also evident. The way of water flowing through the column from its bottom to upper can help alleviate the clog of packed column.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 3074-3077
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.3074
• Online since: May 2012
• Authors: Zhi Bin Guo, Lei Shi, Jia Liu, Ting Yang, Hong Liang Wang, Chun Li Kang
• Keywords: Dissolved Phosphorus, Highway Runoff, Infiltration, Petroleum, Zinc

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