Simultaneous decontamination of cross-polluted soils with heavy metals and PCBs using a nano-metallic Ca/CaO dispersion mixture.
In the present work, we investigated the use of nano-metallic calcium (Ca) and calcium oxide (CaO) dispersion mixture for the simultaneous remediation of contaminated soils with both heavy metals (As, Cd, Cr, and Pb) and polychlorinated biphenyls (PCBs). Regardless of soil moisture content, nano-metallic Ca/CaO dispersion mixture achieved about 95-99% of heavy metal immobilization by a simple grinding process. During the same treatment, reasonable PCB hydrodechlorination efficiencies were obtained (up to 97%), though higher hydrodechlorination efficiency by preliminary drying of soil was observed.
Department of Civil and Environmental Engineering, University of Ulsan, Ulsan, 680-749, Republic of Korea, srireddys@ulsan.ac.kr.
Srinivasa Reddy
SR
Mallampati
Yoshiharu
Y
Mitoma
Tetsuji
T
Okuda
Shogo
S
Sakita
Cristian
C
Simion
D002118:Calcium / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D003666:Decontamination; D004787:Environmental Pollution; D019216:Metals, Heavy / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D011078:Polychlorinated Biphenyls / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*
D017610:Calcium Compounds; D019216:Metals, Heavy; D010087:Oxides; D012987:Soil; D012989:Soil Pollutants; C016538:lime; D011078:Polychlorinated Biphenyls; D002118:Calcium