A Source Pollution Control Measure Based on Spatial-Temporal Distribution Characteristic of the Runoff Pollutants at Urban Pavement Sites

Abstract

The concentrations of pollutants in urban pavement runoff are normally higher than those in other urban surface runoff, which causes serious problems in protecting the environment of receiving water and soils. The purpose of this study was to propose a source pollution control measure based on the spatial-temporal distribution characteristics of the runoff pollutants at urban pavement sites. Therefore, samples from pavement runoff were collected and tested for analyzing the spatial-temporal distribution characteristics. Then, infiltration tests were conducted on selected purification materials to evaluate their purification ability to the simulated pavement runoff. Results indicated that heavy metals Zn and Pb were at high concentrations near the intersection, the reason being the frequent braking of vehicles at this site. The level of suspended solids was far higher than the limitation in the standard near the site where massive human activities occurred. Besides, the cumulative amounts of all kinds of pollutants tended to be stable with the extension of rainfall duration. The logarithmic function was found to fit the experimental data well. Finally, the pavement runoff was categorized into different situations. The combinations of purification materials were recommended and integrated into a source control measure for the treatments of different pollution situations, which made the most use of each purification material and ensured the high elimination efficiency of different pollutants.

Performance Evaluation of Enhanced Bioretention Systems in Removing Dissolved Nutrients in Stormwater Runoff

“…Although the results of the SEM and EDS suggest that phosphate precipitates are present on the surface of zeolite and limestone, the characteristic peaks for phosphate were not found by XRD. This indicates that the chemical interaction between the cations and the zeolites may have occurred mainly on the surface of the media [12]. It is also possible that the characteristic diffraction peaks of phosphate coincide with those of zeolite and limestone [30,48].…”

“…Studies have shown that half of the nitrogen pollutants in urban rivers come from surface runoff formed during urban rainfall and the concentrations of metal elements in some runoff can exceed more than ten times the limitations for surface water quality [7,8]. Nitrogen, heavy metals, and phosphorus present in the surface runoff lead to the functional degradation of about two-thirds of urban rivers, and the pollutants discharged from this surface runoff present a serious threat to the urban water system [9][10][11][12]. In order to control the amount of nitrogen chemical oxygen demand (COD) and phosphorus in stormwater runoff and prevent the further deterioration of the urban water ecosystem, decentralized management of rainwater becomes critically important [13].…”

Achievements and Prospects of Advanced Pavement Materials Technologies

“…Y. Tian, B. Ma, K. Tian, N. Li, and X. Zhou determined the components of light screening preventive maintenance agent (LS pre-maintenance agent) for strong ultraviolet (UV) radiation areas and evaluated its performance [17]. C. Kou, A. Kang, P. Xiao, P. Mikhailenko, H. Baaj, L. Sun, and Z. Wu presented a source pollution control measure based on the spatial-temporal distribution characteristic of the runoff pollutants at urban pavement sites [10].…”