Econ. Environ. Geol. 2005; 38(3): 273-284

Published online June 30, 2005

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Remediation Process by using Lime and Calcium Carbonate for Heavy Metal Contaminated Groundwater Originated from Landfills

Nain Song, Yesun Lee and Minhee Lee*

Department of Environmental Geosciences, Pukyong National University, Pusan 608-737, Korea

Correspondence to :

Minhee Lee

heelee@pknu.ac.kr

Received: February 8, 2005

Abstract

Coagulation and precipitation process by using lime(Ca(OH)2) and calcium carbonate (CaCO3) were applied to remove heavy metals from groundwater in laboratory scale. From results of batch tests, by the addition of 0.3 wt.% lime, more than 90% of As and Mn were removed and 75-80% of Cd and Zn were removed by using 0.5 wt.% of lime. Removal efficiency of Pb almost reached 100% with only 0.1 wt.% of calcium carbonate and more than 93% of Cd were removed by the addition of 1.0 wt.% of calcium carbonate. Pilot scale column experiments were performed to remove heavy metals in the separation process of precipitated floc to supernatant after the coagulation/precipitation. For lime as a coagulant, more than 99% of As were removed from artificial groundwater and removal
efficiencies of Cd, Mn, and Zn were over 80%. By using calcium carbonate, more than 95% of Cd and Pb were removed in column experiment. Fe and Mn contaminated groundwater taken from a real landfill site, Ulsan was used for the column experiment and more than 99% of Fe and Mn were removed by the addition of 1 wt.% lime in column experiment, suggesting that the coagulation/ precipitation process by using lime and calcium carbonate have a great possibility to remove heavy metals from contaminated groundwater.

Keywords coagulation, heavy metal, groundwater, lime, calcium carbonate

Article

Econ. Environ. Geol. 2005; 38(3): 273-284

Published online June 30, 2005

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Remediation Process by using Lime and Calcium Carbonate for Heavy Metal Contaminated Groundwater Originated from Landfills

Nain Song, Yesun Lee and Minhee Lee*

Department of Environmental Geosciences, Pukyong National University, Pusan 608-737, Korea

Correspondence to:

Minhee Lee

heelee@pknu.ac.kr

Received: February 8, 2005

Abstract

Coagulation and precipitation process by using lime(Ca(OH)2) and calcium carbonate (CaCO3) were applied to remove heavy metals from groundwater in laboratory scale. From results of batch tests, by the addition of 0.3 wt.% lime, more than 90% of As and Mn were removed and 75-80% of Cd and Zn were removed by using 0.5 wt.% of lime. Removal efficiency of Pb almost reached 100% with only 0.1 wt.% of calcium carbonate and more than 93% of Cd were removed by the addition of 1.0 wt.% of calcium carbonate. Pilot scale column experiments were performed to remove heavy metals in the separation process of precipitated floc to supernatant after the coagulation/precipitation. For lime as a coagulant, more than 99% of As were removed from artificial groundwater and removal
efficiencies of Cd, Mn, and Zn were over 80%. By using calcium carbonate, more than 95% of Cd and Pb were removed in column experiment. Fe and Mn contaminated groundwater taken from a real landfill site, Ulsan was used for the column experiment and more than 99% of Fe and Mn were removed by the addition of 1 wt.% lime in column experiment, suggesting that the coagulation/ precipitation process by using lime and calcium carbonate have a great possibility to remove heavy metals from contaminated groundwater.

Keywords coagulation, heavy metal, groundwater, lime, calcium carbonate

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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