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KANDUNGAN LOGAM Pb DAN Cu DALAM BUAH STROBERI SERTA SPESIASI DAN BIOAVAILABILITASNYA DALAM TANAH TEMPAT TUMBUH STROBERI DI DAERAH BEDUGUL

ANAK AGUNG BAWA PUTRA,S.Si.,M.Si., ANAK AGUNG BAWA PUTRA (2016) KANDUNGAN LOGAM Pb DAN Cu DALAM BUAH STROBERI SERTA SPESIASI DAN BIOAVAILABILITASNYA DALAM TANAH TEMPAT TUMBUH STROBERI DI DAERAH BEDUGUL. Jurnal Kimia (Journal of Chemistry), 10. ISSN 1907-9850

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Abstract

ABSTRAK Penelitian tentang spesiasi dan bioavailabilitas logam berat Pb dan Cu dalam buah stroberi dan tanah tempat tumbuh stroberi di daerah Bedugul telah dilakukan. Penelitian ini bertujuan untuk mengetahui kandungan logam berat Pb dan Cu total dalam buah stroberi dan tanah tempat tumbuhnya serta spesies dan bioavailabilitas kedua logam tersebut dalam tanah tempat tumbuh stroberi di daerah Bedugul. Metode digesti basah menggunakan reverse aqua regia dan ekstraksi bertahap untuk melepaskan logam berat yang terikat pada berbagai fase tanah. Pengukuran kedua logam tersebut dilakukan dengan menggunakan AAS (Shimadzu, AA-7000). Kandungan Pb dan Cu total berturut-turut 2,5903–9,2019 dan 0,8744–1,1567 mg/kg dalam buah stroberi dan 20,7912–39,0144 dan 39,3154–42,6620 mg/kg dalam tanah. Spesiasi logam Pb dan Cu dalam tanah yang berasosiasi dengan fraksi EFLE berturutturut 3,4944 dan 1,2454 mg/kg, sementara yang terikat pada fase Fe/Mn oksida 5,6652 dan 3,1860 mg/kg. Logam Pb dan Cu yang terikat pada fase Organik/Sulfida berturut-turut 7,9553 dan 5,5913 mg/kg, sedangkan yang terikat pada fase Resistant adalah 13,4471 dan 31,0796mg/kg. Bioavailabilitas logam Pb dan Cu dalam tanah didominasi oleh fraksi non bioavailabel yaitu berturut-turut 43,69 dan 76,11%, diikuti oleh fraksi berpotensi bioavailabel, dan fraksi yang terkecil adalah fraksi bioavailabel. Kata kunci : tanah, Pb, Cu, ekstraksi bertahap, spesiasi, dan bioavailabilitas ABSTRACT A study about speciation and bioavailability of heavy metals Pb and Cu in strawberry fruits and in the strawberry soils in Bedugul areas has been carried out. This study was aimed to determine the concentrations of Pb and Cu in the fruits and the soils, as well as speciation and bioavailabilities of both metals in the soils. Wet digestion method with reverse aqua regia was applied for determining the total metals, while sequential extraction method was performed to fractionate the metals bound to the various phases of the soils. The measurement of both metals was carried out by the use of AAS (Shimadzu, AA-7000). The total Pb and Cu contents in the fruits were 2.5903-9.2019 and 0.8744-1.1567 mg/kg, respectively while in the soils were 20,7912 -39.0144 and 39.3154-42,6620 mg/kg, respectively. In the speciation of both metals in soils, it was found that Pb and Cu associated with EFLE phases were 3.4944 and 1.2454 mg/kg, respectively, while those bound to Fe/Mn Oxides phases were 5.6652 and 3.1860 mg/kg, respectively. The Pb and Cu bound to organic/sulfide phases were 7.9553 and 5.5913 mg/kg, respectively and those bound to resistant phases were 13.4471 and 31.0796 mg/kg, respectively. Bioavailabilities of Pb and Cu in the soils were dominated by non bioavailable fractions, i.e. 43.69 and 76.11%, respectively, followed by the fractions of potentially bioavailable, and the lowest fractions were found as readily bioavailable. Keywords : soils, Pb, Cu, sequential extraction, speciation, bioavailability

Item Type: Article
Uncontrolled Keywords: -
Subjects: L Education > L Education (General)
Divisions: Faculty of Law, Arts and Social Sciences > School of Education
Depositing User: Mr. Repository Admin
Date Deposited: 07 Jun 2016 21:58
Last Modified: 21 Jun 2016 05:58
URI: http://erepo.unud.ac.id/id/eprint/764

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