Speciation of Lead (Pb) and Cadmium (Cd) in Agricultural Farmland Soils of Pancasari Village as A Vegetables Central Area of Bali, Indonesia
I Dewa Ketut Sastrawidana

Undiksha

Abstract

The use of agrochemical such as fertilizers and pesticides intensively on agriculture sector contributes to the increase of heavy metals residual in soil and vegetables. Lead (Pb) and Cadmium (Cd) are two types of heavy metal considered toxic, carcinogenic for living organism and persistence in environment. Pb and Cd metals are frequently found as impurities in fertilizer products. Our researches focused on the speciation of Pb and Cd heavy metals on soil which cultivated vegetables. In addition, soil characteristic (organic matter content, pH and cation exchange capacity) as a factor influencing heavy metal speciation and bioavailability for plants also analyzed. Beside that, measurement of Pb and Cd content on several types of vegetables such as tomatoes, cabbage and carrots are conducted then used to determine the level of safety for consumed. Heavy metals speciation carried out using sequential extraction method then the Pb and Cd content on each fraction was analyzed by atomic absorption spectrophotometer. Heavy metal of Pb in various fraction are in the following order F3> F1> F5 > F4>F2 whereas heavy metal of Cd order F4> F1>F3>F5>F2. The organic matter, pH and cation exchange capacity on sample soil was 3.05% ; 5.56 and 20.30 mek/100 g, respectively. The health risk values of daily intake of metal (DIM) and health risk index (HRI)<1 indicates that the vegetables was relatively safety for consumed.

Keywords: Cadmium, lead, farmland, fertilizer, health risk index, heavy metals speciation.

Topic: Chemistry

Link: https://ifory.id/abstract-plain/MXDL9UY6r2eV

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