Reduction of Pb(II) ion in soybean seeds (Glycine max) using corncob liquid smoke

Abstract

This research aims to study the ability of corncob liquid smoke for reduce of Pb(II) Ion in soybean seeds and the influence of its constituent compounds in reducing of Pb content in soybean seeds. The liquid smoke was obtained from corncob via pyrolysis, precipitation and two-time distillation. The process of reducing Pb content in soybean seeds is by soaking soybean seeds in liquid smoke with variations in the concentration of liquid smoke (0; 12.5; 25; 50 and 100%). Results show that the phenol, carbonyl and acid total content of corncob liquid smoke were 1.22%; 5.65%; and 9.60%; respectively. The corncob liquid smoke with concentration of 100% is able to reduce Pb content in soybean seeds by 48.93%. The components of phenol, carbonyl and acid in liquid smoke reduce after the chelation process. This shows that phenol, carbonyl and acid components influence the reduce Pb content in soybean seeds.