Evaluation of Permeable Pavement Systems for Removing Heavy Metals from Stormwater

This study examines a modified permeable pavement system (PPS) for enhanced heavy metal attenuation from stormwater. A laboratory model consisting of six PPS columns has been tested under varying rainfall intensities. The structures are arranged based on the following hypotheses enhancing attenuation: (i) addition natural zeolite layer in subbase promoting by adsorption and ion exchange; (ii) bark chip as an organic carbon source biosorption metals; (iii) maintaining saturated zone order to maintain required humidity level decrease oxygen increased biodegradation; (iv) inclusion thin sand layers restrict transport create anoxic enhance filtration. Successful treatment metals such Ba, Co, Mn, Ni, Zn observed various conditions using conventional PPS. intensity greatly influences Al, Cr, Cu, Mo Sr. During rains through structure, chromium is found be leached back into infiltrate. results indicate that changing material setting, can encouraged structure. this suggest structure amended adding its region, donor attenuation. Compared proposed reduces Cr desorption improves Cu Mo.