Revista de Gestão da Zona Costeira

Abstrato

Chelating Ability of Crab Shell Particles and Extracted Acetamido Groups (Chitin And Chitosan)from Portunus Sp to Lead (Pb2+)

Moh. Muhaemin

Various toxic metal species, including lead, are produced rapidly by industrial activities and fossil fuel
consumption. The use of biological component as sorbents for heavy metals might be an alternative
method to reduce a heavy metal concentration from various aqueous systems. Here, we used crab shell
particles and extracted acetamido component from Portunus sp (chitin and chitosan) to reduce the
concentration of lead (II). The crab shell was powdered, sieved, and added with lead (II) in various pH
values. The lead (II) solution added to extract of chitin and chitosan was separated, to determine the
chelating ability of them. The result showed that the removal efficiency of lead with crab shell depend on
pH value, but it was less sensitive than that of the control without crab shell. Biosorption of chitin and
chitosan showed different phenomenon. It showed that both chitin and chitosan absorb with the best
capacity at pH 4.0. Chitosan has higher sorption than chitin for all treatments.