Investigations of Metal Pollution in Road Dust of Steel Industrial Area and Application of Magnetic Separation

被引：7
作者：
Jeong, Hyeryeong [1 ,2 ]
Ra, Kongtae [1 ,2 ]
机构：
[1] Korea Inst Ocean Sci & Technol, Marine Environm Res Ctr, Busan 49111, South Korea
[2] Univ Sci & Technol, KIOST Sch, Dept Ocean Sci Oceanog, Daejeon 34113, South Korea
来源：
SUSTAINABILITY | 2022年 / 14卷 / 02期
关键词：
magnetic separation; metal pollution; road dust; road cleaning strategy; BRAKE ABRASION DUSTS; DEPOSITED SEDIMENTS; HEAVY-METALS; RISK-ASSESSMENT; IRON RECOVERY; HEALTH-RISK; URBAN; CITY; ANTIMONY; SOIL;
D O I：
10.3390/su14020919
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Pollution characteristics and ecological risks for metals in non-magnetic and magnetic road dust from steel industrial areas were investigated by applying a magnetic separation method. Metal (except for Al, Li, Ti, As, and Sb) concentrations in the magnetic road dust were 1.2 (Sn) to 7.8 (Fe) times higher than those in the non-magnetic road dust. For the magnetic road dust, the geo-accumulation index revealed a strongly to extremely polluted status for Cr, Zn, Cd, and Sb, a strongly polluted status for Mn, Cu, and Pb, and a moderately to strongly polluted status for Fe, Ni, Mo, and Hg. This result indicates that the dominant metal pollution sources of road dust in industrial areas were the traffic activities of heavy-duty vehicles. The mean content of magnetic particles accounted for 44.7% of the total road dust. The metal loadings in the magnetic road dust were 86% (Fe), 77% (Cr), 67% (Mn), 86% (Ni), 76% (Cu), 72% (Zn), 64% (Mo), and 62% (Cd), respectively. Removal of the magnetic fraction from road dust using magnetic separation techniques not only reduces metal contamination but can also improve effective road cleaning strategies or reduce waste generation.
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页数：12
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