Phytoremediation of lead (Pb) polluted soil by Cordyline fruticosa and Ipomea reptans Poir (case study: Used battery smelting industry at Cinangka Village, Bogor)

Abstract

Cinangka Village, Bogor, has been the center of the battery smelting industry since 1980. Thus, has resulted the soil contamination. The purpose of this study are 1) Calculate the percentage of reduction of lead (Pb) in soil after treated by Codyline fruticosa and Ipomea reptans Poir for 24 and 36 days; 2) Determine the Pb uptake by plants based on Pb concentration of plants and dry weight of plants; 3) Analize the efficiency of Pb absorpsion by plants to Pb polluted soil. The method used for this study are experimental method and laboratory analysis. The parameters tested were Pb in soil, Pb in Plant, dry weight of plant, and pH in soil. The efficieny of the plants was known by laboratory analysis using the Cordyline fruticosa and Ipomea reptans Poir within 24 and 36 days to remediate the soil with 10,032.84 ppm Pb as many as 12 samples. Percentage of reduction of Pb in the soil by the treatment of Cordyline fruticosa for 24 days was 36.58% and 97.99% after 36 days treatment. Reduction of Pb in the soil by treatment of Ipomea reptans Poir for 24 days was 39.98% and 97.80% after 36 days treatment. Pb uptake by Cordyline fruticosa was only 2,314.75x10-6 mg for 24 days treatment and 2,120.12x10-6 mg in 36 days treatment. Pb uptake by Ipomea reptans Poir is 22.26x10-6mg for 24 days treatment and 34.40x10-6.mg for 36 days treatment. The analysis showed that the efficiency of Pb absorption from soil contaminated by Cordyline fruticosa was only 3.72% and 2.08% by Ipomea reptans Poir after 24 days of treatment. The analysis showed that the efficiency of Pb absorption from soil contaminated by Cordyline fruticosa was only 4.31% and 3.79% by Ipomea reptans Poir after 36 days of treatment. Ipomea reptans Poir is not suitable as a phytoremediation agent of heavy metals because it is a food crop. Cordyline fruticosa as an ornamental plant is more recommended for planting around of battery smelting area.