title: Particle size distribution and pollutants in road-deposited sediments in different areas of Zhenjiang, China.
abstract: An understanding of road-deposited sediment (RDS) characteristics on an impervious surface is essential to estimate pollutant washoff characteristics and to minimise the impacts of pollutants on the water environment. A total of 62 RDS samples were collected from four different land-use types (commercial, residential, intense traffic and riverside park) in Zhenjiang City, China. The samples were fractionated into seven grain-size classes and analysed for particle size distribution and concentrations of pollutants. The samples are found to consist predominantly of fine particles (60-80%, <250 microm). The maximum mean concentrations of zinc, lead and copper were 686.93, 589.19 and 158.16 mg/kg, respectively, with the highest metal concentrations found in samples from the intense traffic area. The maximum mean contents of organic matter (12.55%), nitrogen (6.31 mg/g) and phosphorus (5.15 mg/g) were found in samples from the commercial area. The concentrations of heavy metals were highest in the smallest particle size fraction analysed (63 microm). The organic matter and nitrogen content generally increased with decreasing particle sizes in the <500-microm particle size range. The results also revealed that most of the total nitrogen (TN) is attached to the finer sediments and that to effectively reduce TN loads in particulates, treatment facilities must be able to remove the finer particles (down to 125 microm for TN).
authors.affiliation: Jiangsu Academy of Environmental Science, Nanjing 210098, People's Republic of China. bianbo1@163.com
authors.forename: Bo
authors.initials: B
authors.lastname: Bian
authors.forename: Wei
authors.initials: W
authors.lastname: Zhu
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005843:Geography; D019015:Geologic Sediments / Q000737:chemistry* / Q000145:classification; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis; D010316:Particle Size; D010758:Phosphorus / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D008670:Metals; D012989:Soil Pollutants; D010758:Phosphorus; D009584:Nitrogen
references.citation: Environ Technol. 2001 Mar;22(3):307-19
references.pmid: 11346288
references.citation: Sci Total Environ. 1999 Sep 1;235(1-3):143-50
references.pmid: 10535115
references.citation: Environ Pollut. 2000 Dec;110(3):483-95
references.pmid: 15092827
references.citation: Water Sci Technol. 2002;45(9):263-8
references.pmid: 12079112
references.citation: Sci Total Environ. 2002 Oct 21;298(1-3):131-45
references.pmid: 12449334
references.citation: Environ Pollut. 2003;121(2):229-37
references.pmid: 12521110
references.citation: Environ Geochem Health. 1995 Sep;17(3):139-46
references.pmid: 24194184
references.citation: Sci Total Environ. 2000 Dec 18;263(1-3):69-78
references.pmid: 11194164
references.citation: Appl Radiat Isot. 2003 Mar;58(3):339-46
references.pmid: 12595012
references.citation: Sci Total Environ. 2005 Mar 1;339(1-3):41-7
references.pmid: 15740756