Study on pollution characteristics of urban pavement runoff

Abstract

Urban pavement runoff has become an important pollution source to endanger the quality of urban water. This paper analyzed the characteristics of particle size distribution of road-deposited sediment (RDS). The variation of pollutants contented with RDS was presented. Based on continuous sampling of runoff, the variation between pollutant concentration and rainfall characteristics was revealed. The results show that each particle group shares similar content except for the group smaller than 0.075 mm. However, the smaller particles have the stronger ability to adsorb heavy metals (Zn, Pb, Cu), and the weaker ability to adsorb Chemical Oxygen Demand (COD). The concentrations of different pollutants have different relationships with rainfall and runoff time. The concentration of suspended solids (SS) decreases monotonously with runoff time, while the concentration of heavy metals increases first and then decreases. The first 30 minutes of runoff is the best time to treat heavy metals and SS. And the five-day biochemical oxygen demand (BOD5) and total petroleum hydrocarbons (TPHs) concentration are mainly affected by rainfall intensity. The result presented in this paper may provide a useful reference for the treatment of pavement runoff pollution.

Unveiling the Potential: Selecting Optimal Materials for Physical Pools in a Pavement-Runoff-Integrated Treatment System

“…In order to obtain the artificial pavement runoff pollutant required for the indoor scaled down model, sediment was collected from the curbstone of the entrance to Wanjiali South Road, Changsha Bypass Expressway, China, at a range of 0-50 cm. This is because most of the road sediment is deposited at both sides of the road within 50 cm of the curbstone [31]. The collected area was 5 m 2 .…”

Quality of first flush of rainwater from urban area: short review

“…In his research, Mamoon also evaluated the formation of the first effluent in an urbanized area, finding that the largest mass of pollutants was the 1252 (2022) 012075 IOP Publishing doi:10.1088/1757-899X/1252/1/012075 4 first 40 % runoff [3]. Qian et al (2021), in their research, they assessed the mass of pollutants trapped in the first 30 % runoff. They have found that in the first 30 % of runoff, is occurring 36 % to 90 % of pollutants (depending on the characteristics of pollutants, rain, and land use) [18].…”

“…Qian et al (2021), in their research, they assessed the mass of pollutants trapped in the first 30 % runoff. They have found that in the first 30 % of runoff, is occurring 36 % to 90 % of pollutants (depending on the characteristics of pollutants, rain, and land use) [18]. In their study, Huang et al (2012) verified that the first 30 runoff volumes carried the largest mass of pollution.…”

“…When assessing the formation of the first flush, it is important to know the relationship between the characteristics of providing and precipitation and pollutants. Mamoon et al (2019) [3] and Qian et al (2021) [18] report that pollutants such as dust particles are easily flushed away as heavy metals by runoff due to their weight. Detic et al (1998) [12] also state that the first flush was not the same in all assessed river basins; a more significant first flush was recorded in river basins, where was the intensive rainfall.…”

Source identification, Accumulation and Dispersion of Heavy Metals pollution into the Surface Sediments of Urban Runoff (Case Study, Channels of Tehran City

“…As a result, the TOC value is highly variable [40]. The positive correlation between the concentration of a few organic pollutants and non-organic with TOC% has been announced by numerous researchers in their surveys [41][42][43][44][45].The combination and heavy metal distribution is affected by the particle size distribution of sediments in runoff [46][47][48][49].Generally, less particles have a further speci c surface area to deposit heavy metals and to adsorb higher heavy metal concentrations in comparison with larger particles [50][51][52][53]. The particle sediments with a size less than 63 micrometers(63µm>) can attach to human skin, which is a problem for human health [46,47].…”