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Chen Y, Yang Z, Dong J, Hong N, Tan Q. Understanding phosphorus fractions and influential factors on urban road deposited sediments. Sci Total Environ 2024; 921:170624. [PMID: 38325458 DOI: 10.1016/j.scitotenv.2024.170624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 01/09/2024] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
Phosphorus (P) is a primary pollutant that builds-up on urban road surfaces. Understanding the fraction and load characteristics of P, as well as their relationship with urban factors, is helpful for assessing the ecological risk of urban receiving water bodies. This study presents the characteristics of build-up loads of P fractions in road-deposited sediments (RDS) in Guangzhou, China, analyzes their correlation with three urban factors (road, traffic, and land-use area), and then estimates the exceedance probability of P in stormwater runoff over the past 10 years. The results showed that detrital apatite phosphorus (De-P) performed the highest build-up load on urban road surfaces, followed by apatite phosphorus (Ca-P), iron-bound phosphorus (Fe-P), exchangeable phosphorus (Ex-P), aluminum-bound phosphorus (Al-P), organophosphorus (POP), dissolved inorganic phosphorus (DIP), occluded phosphorus (Oc-P), and dissolved organic phosphorus (DOP). Depression depth, road materials, and land-use fractions affected the P fractions. The P in the RDS may have originated from three distinct sources: road background, domestic waste, and untreated wastewater discharge. In the most recent 10 years, the event mean concentrations of total P in the RDS have had a 30 % probability of exceeding 0.4 mg L-1, which indicates a serious threat of P to receiving water bodies. The outcomes of this study are expected to provide valuable guidance for elucidating the principal categories of urban non-point source P pollution and enhancing the ecological health of urban water environments.
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Affiliation(s)
- Yushan Chen
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Zilin Yang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Jiawei Dong
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
| | - Nian Hong
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Qian Tan
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, China.
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Hu L, Mao J, Zhong R, Zhao H. Assessment of heavy metals mobilization in road-deposited sediments induced by COVID-19 disinfection. Water Res 2023; 243:120393. [PMID: 37487359 DOI: 10.1016/j.watres.2023.120393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 07/26/2023]
Abstract
Road-deposited sediments (RDS) on urban impervious surfaces are important carriers of heavy metals (HMs), and can contribute to urban runoff pollution. With the outbreak of COVID-19, chlorinated disinfectants (CDs) have been extensively sprayed on these surfaces. This practice may have a superposed or priming effect on HMs contaminants in RDS, yet this remains unknown. This study examined the effects of seven CDs concentration gradients (0, 250, 500, 1000, 2000, 5000, 60,000 mg/L) on the leaching and chemical forms of HMs (Cd, Cr, Ni, Pb, and Zn) in seven particle size fractions (<44, 44-63, 63-105, 105-149, 149-250, 250-450, 450-1000 μm). The results showed that CDs can promote the leaching of HMs in RDS, at the recommended CDs dose (2000 mg/L), except for Pb, the leaching amounts increased by 21.8%-237.2% compared with the untreated RDS. The alteration in the leaching were primarily attributed to the redistribution of chemical forms of HMs in RDS, specifically, the acid-extractable fractions percentage increased by 0.23%-24.39%, and the reducible fractions percentages decreased by 3.21%-38.35%. The lower oxidation-reduction potential (ORP) and alkalinity of CDs as strong oxidants were responsible for the redistribution of forms. The leaching and chemical forms of HMs vary among different particle sizes, but in any case, finer particle sizes (< 105 μm) still dominate their contribution. The current control measure of street sweeping is ineffective in removing these particles. These findings will facilitate the development of strategies for controlling urban diffuse pollution from RDS during the pandemic. Finally, this study suggests potential directions for future research.
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Affiliation(s)
- Lian Hu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China
| | - Jintao Mao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China
| | - Ronghua Zhong
- Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, China
| | - Hongtao Zhao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Gelhardt L, Dittmer U, Welker A. Relationship of particle density and organic content in sieve fractions of road-deposited sediments from varying traffic sites based on a novel data set. Sci Total Environ 2021; 794:148812. [PMID: 34323771 DOI: 10.1016/j.scitotenv.2021.148812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Pollutants (e.g. heavy metals) are to a large extent bound to particles in runoff from traffic areas. Sedimentation is the prevailing process of treatment in most cases. The effectiveness of treatment depends largely on the characteristics of the particles, especially their size and density. Road-deposited sediments (RDS) are the main source of solids in runoff. The sizes and density vary over a wide range, as the particles are composed of mineral and organic components of different origin (e.g. tire and road wear, plant debris, erosion from surrounding areas, atmospheric deposition). While many previous studies have dealt with particle-size distributions, there are still relatively few studies on density. The aim of this study was to investigate the relationship between particle size, organic content and density in RDS on a large data set from different sites and the influence of site-specific conditions on the composition. In addition, it should be checked whether the loss on ignition (LOI) is suitable as a surrogate parameter for density. Density was obtained by gas pycnometry, LOI by ignition in a muffle furnace at 550 °C. In total, 85 RDS samples were collected at 11 sites over a 5 year period and sieved into ten sieve fractions <2000 μm. Each sieve fraction was analyzed for LOI and density (n = 848). This novel data set covers a wide range of boundary conditions in terms of traffic intensity and surrounding vegetation. The results show that there is a strong negative linear correlation of density and LOI independent of particle size <2000 μm (R2 = 0.867). LOI is an applicable surrogate parameter for density in RDS. Site-specifically traffic and vegetation proved significant sources of organic content and density in the multicomponent mixtures in form of tire wear and plant debris.
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Affiliation(s)
- Laura Gelhardt
- Fachgebiet Siedlungswasserwirtschaft und Hydromechanik (Institute of Urban Water Management and Hydromechanics), Frankfurt University of Applied Sciences, Nibelungenplatz 1, 60318 Frankfurt am Main, Germany
| | - Ulrich Dittmer
- Department of Urban Water Management, Technical University of Kaiserslautern, Paul-Ehrlich-Straße 14, 67663 Kaiserslautern, Germany
| | - Antje Welker
- Fachgebiet Siedlungswasserwirtschaft und Hydromechanik (Institute of Urban Water Management and Hydromechanics), Frankfurt University of Applied Sciences, Nibelungenplatz 1, 60318 Frankfurt am Main, Germany.
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Kim DG, Kang HM, Ko SO. Reduction of non-point source contaminants associated with road-deposited sediments by sweeping. Environ Sci Pollut Res Int 2019; 26:1192-1207. [PMID: 28929414 DOI: 10.1007/s11356-017-0192-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
Road-deposited sediments (RDS) on an expressway, residual RDS collected after sweeping, and RDS removed by means of sweeping were analyzed to evaluate the degree to which sweeping removed various non-point source contaminants. The total RDS load was 393.1 ± 80.3 kg/km and the RDS, residual RDS, and swept RDS were all highly polluted with organics, nutrients, and metals. Among the metals studied, Cu, Zn, Pb, Ni, Ca, and Fe were significantly enriched, and most of the contaminants were associated with particles within the size range from 63 μm to 2 mm. Sweeping reduced RDS and its associated contaminants by 33.3-49.1% on average. We also measured the biological oxygen demand (BOD) of RDS in the present work, representing to our knowledge the first time that this has been done; we found that RDS contains a significant amount of biodegradable organics and that the reduction of BOD by sweeping was higher than that of other contaminants. Significant correlations were found between the contaminants measured, indicating that the organics and the metals originated from both exhaust and non-exhaust particles. Meanwhile, the concentrations of Cu and Ni were higher in 63 μm-2 mm particles than in smaller particles, suggesting that some metals in RDS likely exist intrinsically in particles, rather than only as adsorbates on particle surfaces. Overall, the results in this study showed that sweeping to collect RDS can be a good alternative for reduction of contaminants in runoff.
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Affiliation(s)
- Do-Gun Kim
- Department of Civil Engineering, Kyung Hee University, Yongin, Korea
| | - Hee-Man Kang
- Construction and Environment Research Division, Expressway and Transportation Research Institute, Korea Expressway Corporation, Hwaseong, Korea
| | - Seok-Oh Ko
- Department of Civil Engineering, Kyung Hee University, Yongin, Korea.
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Ermolin MS, Fedotov PS, Ivaneev AI, Karandashev VK, Fedyunina NN, Burmistrov AA. A contribution of nanoscale particles of road-deposited sediments to the pollution of urban runoff by heavy metals. Chemosphere 2018; 210:65-75. [PMID: 29986225 DOI: 10.1016/j.chemosphere.2018.06.150] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 06/17/2018] [Accepted: 06/23/2018] [Indexed: 06/08/2023]
Abstract
Road-deposited sediments (RDS) present a sink for traffic-related pollutants including heavy metals (HMs). HMs associated with RDS particles enter the urban aquatic environment during rainfall events and have adverse effects for biota. RDS nanoscale particles (NSPs) require special consideration due to their specific properties, extremely high mobility in the environment, and ability to penetrate into living organisms. In the present work, the contribution of NSPs of RDS to the pollution of urban runoff by HMs has been evaluated for the first time. It has been shown that bulk RDS samples are polluted by HMs as compared to background urban soils (geo-accumulation indexes of Cu and Zn may attain 2-3). Meanwhile, NSPs of RDS are enriched by HMs as compared to bulk samples; concentration factor for Ni, Cu, Zn, Cd, Sn, and Pb in NSPs being varied from 2 to 10. The water-soluble fractions of RDS samples were also analyzed. Results have shown that the content of water-soluble HMs in RDS is insignificant and rarely exceeds 0.5% of the total contents of HMs in the bulk samples; the highest contents are identified for Cu and Pb. It should be noted that the water-soluble fraction is nearly free from Zn and this element is almost entirely present as particulate matter (NSPs). In general, the overall contribution of NSPs and water-soluble fraction of HMs to the pollution of urban runoff is comparable.
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Affiliation(s)
- Mikhail S Ermolin
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow 119991, Russia; National University of Science and Technology "MISiS", Moscow 119991, Russia.
| | - Petr S Fedotov
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow 119991, Russia; National University of Science and Technology "MISiS", Moscow 119991, Russia
| | - Alexandr I Ivaneev
- National University of Science and Technology "MISiS", Moscow 119991, Russia
| | - Vasily K Karandashev
- National University of Science and Technology "MISiS", Moscow 119991, Russia; Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Chernogolovka 142432, Russia
| | - Natalia N Fedyunina
- National University of Science and Technology "MISiS", Moscow 119991, Russia
| | - Andrey A Burmistrov
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
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Ma Y, Gong M, Zhao H, Li X. Influence of low impact development construction on pollutant process of road-deposited sediments and associated heavy metals. Sci Total Environ 2018; 613-614:1130-1139. [PMID: 28954374 DOI: 10.1016/j.scitotenv.2017.09.174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/13/2017] [Accepted: 09/17/2017] [Indexed: 06/07/2023]
Abstract
Intense Low-Impact Development (LID) construction in China could lead to increasingly severe stormwater and receiving water pollution due to the lack of appropriate regulation for mitigating pollution from LID construction. Samples of road-deposited sediments (RDS) were collected from 50 study sites at seven LID construction stages and four road hierarchies to analyze the pollution process and determine the size of the region influenced by LID construction. Six heavy metals were analyzed, and the RDS index model was adopted to estimate the potential heavy metal load washed off by stormwater runoff. Analysis of variance revealed that the excavation and gravel filling of rain gardens and excavation of porous pavements were critical LID construction stages that contributed the largest masses of RDS per unit area to road surfaces. Although the concentration of heavy metals at LID construction sites was lower than at sites without LID construction, the load of heavy metals washed off from LID construction was much higher. In addition, the sizes of regions influenced by accumulated RDS from LID construction descended in the following order: arterial road (600-775m)>collector road (150-200m)>access road (100-150m)>laneway (20-30m). According to the characteristics of LID construction at the study sites, the potential total solid loads in stormwater throughout China were estimated to reach 36,694t by 2020 and 146,777t by 2030. According to the results of analysis, several recommendations are provided for designing LID construction regulations to mitigate stormwater pollution.
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Affiliation(s)
- Yukun Ma
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
| | - Manli Gong
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Hongtao Zhao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China.
| | - Xuyong Li
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China
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Li H, Shi A, Zhang X. Particle size distribution and characteristics of heavy metals in road-deposited sediments from Beijing Olympic Park. J Environ Sci (China) 2015; 32:228-237. [PMID: 26040749 DOI: 10.1016/j.jes.2014.11.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/11/2014] [Accepted: 11/13/2014] [Indexed: 06/04/2023]
Abstract
Due to rapid urbanization and industrialization, heavy metals in road-deposited sediments (RDSs) of parks are emitted into the terrestrial, atmospheric, and water environment, and have a severe impact on residents' and tourists' health. To identify the distribution and characteristic of heavy metals in RDS and to assess the road environmental quality in Chinese parks, samples were collected from Beijing Olympic Park in the present study. The results indicated that particles with small grain size (<150 μm) were the dominant fraction. The length of dry period was one of the main factors affecting the particle size distribution, as indicated by the variation of size fraction with the increase of dry days. The amount of heavy metal (i.e., Cu, Zn, Pb and Cd) content was the largest in particles with small size (<150 μm) among all samples. Specifically, the percentage of Cu, Zn, Pb and Cd in these particles was 74.7%, 55.5%, 56.6% and 71.3%, respectively. Heavy metals adsorbed in sediments may mainly be contributed by road traffic emissions. The contamination levels of Pb and Cd were higher than Cu and Zn on the basis of the mean heavy metal contents. Specifically, the geoaccumulation index (Igeo) decreased in the order: Cd>Pb>Cu>Zn. This study analyzed the mobility of heavy metals in sediments using partial sequential extraction with the Tessier procedure. The results revealed that the apparent mobility and potential metal bioavailability of heavy metals in the sediments, based on the exchangeable and carbonate fractions, decreased in the order: Cd>Zn≈Pb>Cu.
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Affiliation(s)
- Haiyan Li
- Key Lab of Urban Storm-Water System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
| | - Anbang Shi
- Key Lab of Urban Storm-Water System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
| | - Xiaoran Zhang
- Key Lab of Urban Storm-Water System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
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