Eliminasi Logam Cu Oleh Serasah Avicennia Marina Di Lingkungan Tambak Bandeng Wilayah Tapak Tugurejo, Semarang (Cu Metal Elimination by Avicennia Marina Litter Leaf in the Environment of Milkfish Fishpond in Tapak Village, Tugurejo Semarang)

Avicennia marina litter plays an important role in the heavy metal transfer from the plant into its environment. It occurs due to its ability in eliminating the metal from its tissue, as its adaptation to metal – polluted environment. The purpose of this research was to examine the elimination level of Cu through a defoliation process of A. marina into milkfish pond. The objects of the research were water, sediment and A. marina litter. The destruction of Cu in water, sediment and litter was accomplished using Tefflon bomb extraction, followed by measurement of Cu using AAS. The study was conducted in milkfish pond in Tapak region at Semarang city for 90 days, in which the A. marina plants grow. The value of copper content in the water pond was between 0.02 ± 0.007 to 0.05 ± 0.008 mg / L. The concentration of Cu in the sediment ranged from 15.20 ± 1.77 to 25.03 ± 4.77 mg / kg, the concentration factor (CF) of water and waste sediment with water and sediment ranged from 500.52 - 897, 70. The content of Cu in A. marina litter was 2.346 ± 0.536 to 5.285 ± 2.091 mg / kg. The result of the research showed the ability of A. marina litter to reconstruct copper to its environment. The comparison between the ability of A. marina litter to reinstate Cu to water (46.92 to 228.72) is greater than that of the sediment to its environment (.094-.318)