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

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 (TF<1). The result of the BCF and TF showed that Avicennia alba can absorb heavy metals (Pb and Cu) from the environment, however the mobility of the heavy metals in the mangrove will experience different phytoremediation mechanisms (phytostabilization for Cu; phytoexstractionfor Pb). Keywords: Avicennia alba, Phytoremediation, Factor Bioconcentration, Factor Translocation, Heavy Metal (Pb and Cu) Abstrak. Salah satu kawasan di Kota Surabaya yang mempunyai tingkat akumulasi pencemaran terbesar adalah wilayah Wonorejo. Wonorejo merupakan wilayah yang dimanfaatkan sebagai daerah konservasi mangrove. Namun, Pb dan Cu merupakan logam berat yang terdeteksi dalam jumlah yang tinggi pada wilayah ini.Avicennia alba mempunyai kemampuan menyerap logam berat sehingga mangrove dapat dijadikan sebagai agen fitoremediasi. Penelitian ini bertujuan untuk mengetahui kandungan Pb dan Cu yang terdapat dalam sedimen, akar dan daun Avicennia alba; untuk mengetahui potensi Avicennia albasebagai agen fitoremediasi logam berat Pb dan Cu. Distribusi Pb dan Cu pada sedimen, akar dan daun menunjukkan Cu lebih tinggi dibandingkan Pb yang berkisar 4.13 ppm - 36.95 ppm untuk Cu dan 3.28 ppm - 23.79 ppm untuk Pb. Berdasarkan nilai faktor biokonsentrasi (BCF) maka Avicennia albaterkategori bersifat excluder (BCF1) terhadap Pb dan fitostabilisasi (TF