Copper Accumulation by Avicennia marina at Mangrove Eco-forest in Wonorejo, Surabaya

Large quantities of wastewater from industries and households were released to Wonorejo river in Surabaya East Coast area. The concentration of Cu at the Wonorejo Estuary reached 3.186 mg/L at brackish water in 2009 One of the inorganic pollutants that can be removed by mangrove is copper (Cu). The purpose of this research was to determine the potency of Cu accumulation by Avicennia marina that was grown for ten years at Wonorejo Estuary. The sampling activities were conducted using a transect quadrat sampling method with a 10x10 m dimension. There were ten points of location sampling, the sediment and root of A. marina samples were collected in those location sampling. All samples of sediment and root were extracted before those samples were analyzed using an atomic absorption spectrophotometer (AAS). The calculation of the Bioconcentration Factor (BCF) was conducted using a equation formulation. The results showed that concentration Cu in sediment was 27 mg/kg until to 150 mg/kg. The Cu accumulation by roots of A. marina reached 53 mg/kg until to 128 mg/kg. The BCF value in A. marina were 0.91 to 3.22 In conclusion, A. marina showed potential as a hyperaccumulator for Cu.