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The ability of mangrove (Avicennia) to absorb heavy metal has been known. This study aims to determine whether there are differences of absorption level of nonessential (Pb) essential (Cu) heavy metals in Avicennia marina from different location, based on distance of pollutants sources (downstream) toward to the mouth of Porong River Estuary at Sidoarjo. Results showed that accumulation of Pb in the roots and leaves was ranged from 0.0044 to 0.139 ppm and from 0.004 to 0.019 ppm respectively,doi:10.21776/ub.rjls.2015.002.02.6 fatcat:23vbiqkkwrcz5nvwedrflhtc2a