Potensi mangrove Avicennia alba sebagai agen fitoremediasi timbal (Pb) dan tembaga (Cu) di Perairan Wonorejo, Surabaya

Abstract

Abstract. One of the regions in Surabaya which has accumulated the largest pollution levels was the region of Wonorejo. Wonorejo is an area that is used as a mangrove conservation. But,Pb and Cu are heavy metals that have been detected in high concentration in this region. Avicennia albahas been known to have the ability to absorb heavy metals so that mangrove can be used us phytoremediation agent. The purposes of this research were to analyze the concentration of heavy metals (Pb and Cu) in sediments, roots and leaves of Avicennia alba; to understand the potential of Avicennia albaas an agent of phytoremediation. The result showed that Cu concentration was higher than Pb concentration in sediment, roots and leaves. The concentrations of Cu were4.13 ppm - 36.95 ppm and Pb between 3.28 ppm - 23.79 ppm. Based on bioconcentration factor (BCF) Avicennia alba was categorize as excluder (BCF1) and Cu was categorized phytostabilization (TF1) terhadap Pb dan fitostabilisasi (TF<1) terhadap Cu. Berdasarkan hasil perhitungan BCF dan TF maka dapat disimpulkan bahwa Avicennia albamampu untuk menyerap logam berat (Pb dan Cu) yang berada pada dilingkungannya namun mobiltas kedua logam berat pada mangrove akan mengalami mekanisme fitoremediasi yang berbeda (fitostabilisasi untuk Cu ; fitoekstraksi untuk Pb). Kata Kunci:Avicennia alba, Fitoremediasi, Faktor Biokonsentrasi, Faktor Translokasi, Logam Berat (Pb danCu)