DOI: 10.36347/sajb.2018.v06i10.001

Pages: 627-633

Vegetables cultivated near the main road are suspected to be contaminated with heavy metals such as lead. The purposes of this research was to study the effect of distance from road and locality on lead content in soil and leafy vegetables grown in arable lands (near the main road), and to study the relationship between the lead content in the vegetables leaves with the lead content in soil, pH, total organic matter (TOM), cation exchange capacity (CEC) in Tarus and Oesao areas, and to compare the lead content in the vegetables with the National Standard (SNI 01-7387-2009) of lead in vegetables. Twenty four soil samples and 24 vegetable samples (swamp cabbage, Ipomoea reptana and mustard green, Brassica rapa var. parachinensis) were collected two sites: left and right of road; three distance from road: 1 m, 3 m, and 5 m; two replications; and two localities: Oesao and Tarus. Lead was extracted with standardized method and detected by AAS. Results showed that: (1) distance from road and locality did not significantly affected single factor of distance and locality but not by the interaction of both factors; (3) there was a weak relationship between lead in vegetables and soil factors such as lead in soil, pH, organic matter content, and CEC; (4) overall, lead contents in both soil (44.06 mg kg-1) and vegetables (26.85 mg kg-1) were indicated to be higher than the National Standard of lead in plant and soil (0.5 mg kg-1 and 10 mg kg-1, respectively).