| Title |
Contamination Assessment of Heavy Metals in River Sediments (For the Surface Sediments from Nakdong River) |
| Authors |
김신 ( Shin Kim ) ; 안정민 ( Jungmin Ahn ) ; 정강영 ( Kangyoung Jung ) ; 이권철 ( Kwonchul Lee ) ; 권헌각 ( Heongak Kwon ) ; 신동석 ( Dongseok Shin ) ; 양득석 ( Deukseok Yang ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.4.460 |
| Keywords |
Enrichment factor; Heavy metal; Index of geo-accumulation; Metal excess; Nakdong-River; Pollution load index; Surface sediment |
| Abstract |
In order to certificate the contamination assessment of heavy metals in surface sediments from the Nakdong river. Surface sediments were collected of 24 sampling sites (main 14st., tributary 10st.) and analyzed for grain size heavy metals contents. Study area mainly composed of sand (avg. 94.1%) and mean grain size was 1.46 Φ on average. Heavy metals contents (avg. Al: 12.5%, Zn; 74.4, Cr: 45.3, Li: 26.0, Pb: 17.1, Ni: 10.5, Cu: 7.8, Cd: 0.22 mg/kg) were relatively high contents in the composed of fine sediments. In addition, the results of pearson`s correlation coefficient showed that most heavy metals and grain size (silt and clay) were highly correlated. The contents of Zn (6st.) and Ni (1st.) evaluated as moderately polluted, Zn (6st.) evaluated as LEL when compared with sediment quality standard of USEPA and Ontario sediment quality guidelines. Most heavy metals contents were I levels that dose not affected the benthos when compared with sediment pollution evaluation standard of NIER. The results of EX, EF, Igeo and CF showed the contents of Zn, Pb and Cd exceed the background contents and distributing of anthropogenic pollution and evaluated as moderately polluted level. And Nm-08 were relatively high level of contamination in the study area. However as results of PLI (less than 1), all sampling sites were considered unpolluted. |