Characteristic comparison of heavy metal contamination between road-deposited and roof-deposited sediments in suburban area

被引：9
作者：
Yu, Jianghua [1 ,2 ]
Yu, Haixia [3 ]
Xu, Liqiang [4 ]
Tao, Tao [1 ,2 ]
Zhang, Yanxing [1 ,2 ]
Hua, Yuhao [1 ,2 ]
Nkolola, Namwiinga Babra [1 ,2 ]
机构：
[1] Nanjing Univ Informat Sci & Technol, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China
[2] Jiangsu Joint Lab Atmospher Pollut Control, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China
[3] Sun Yat Sen Univ, Guangdong Key Lab Urbanizat & Geosimulat, Sch Geog & Planning, Guangzhou 510275, Guangdong, Peoples R China
[4] PRWRC, Pearl River Hydraul Res Inst, Guangzhou 510611, Guangdong, Peoples R China
来源：
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2017年 / 24卷 / 14期
基金：
中国国家自然科学基金;
关键词：
Road and roof sediments; Heavy metals; Concentration; Size fraction loading; URBAN-RURAL GRADIENT; SIZE DISTRIBUTION; RISK-ASSESSMENT; RUNOFF QUALITY; STREET DUST; CHINA; CITY; POLLUTION; TOXICITY; SURFACES;
D O I：
10.1007/s11356-017-8872-1
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Surface-deposited sediment in urban area is an essential environmental medium for assessing heavy metal contamination. A total of 10 sampling trips were conducted to collect road-deposited and roof-deposited sediments for the comparison of nickel (Ni), copper (Cu), cadmium (Cd), lead (Pb), zinc (Zn), and chromium (Cr) contamination characteristics. Results indicated that roof sediment appeared to have a finer size distribution than road sediments. Roof sediment indicated higher metal concentration and lower surface loading than road sediment. The impact of particle size on heavy metal contamination was quantified by using the developed pioneering term of finer particle effect factor; it differed according to surface types and grain size fraction. Particles in individual grain size fraction showed different contribution to the surface loading for bulk sediments. No consistent trend was found for the grain size fraction loading along with grain size for the studied heavy metals for road sediments. In contrast, an asymmetric "W" trend was observed for the roof sediments, and it had the following results: Fraction of < 63 and 250-500 mu m showed higher loading, while fraction of 90-125 and > 850 mu m indicated the smaller loading. Findings above facilitated the appropriate management practice selection for the treatment of surface-deposited sediments.
引用
收藏
页码：12871 / 12881
页数：11
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