2. Seminar Nasional Pelestarian Lingkungan (SENPLING) 2017

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Kandungan Timbal Dan Amonium Pada Tanah Gambut Fibrik Terbakar Berulang
(2018-03-12) Hanifah, T. Abu; Alfianur, Alfianur; Rexy, Mutya
Peat is an organic material which derives from plants decays remants that get buried naturally over a very long time period at depths greater than 50 cm. this research undertakes an analysis of heavy metal content, that is lead and alkali metals is ammonium ions at oil palm plantations in Pakning Asal Village, Bengkalis district, Riau with different fire occurrence frequencies, as follows: on unburnt land, on once burned land, and on land burned several times (at least 2 – 3 times). The analysis of heavy metals was carried out by using an Atmonic Absorption Spectrophotometer (AAS) while that of ammonium ions using a UV-Vis Spectrophotometer. The content of lead metal decreased in an inversely proportional ratio to the fire occurrence frequency as follow: from 47,8914 mg/Kg to 46,7016 mg/Kg in unburned soil, from 37,1366 mg/Kg to 22,5753 mg/Kg on once burned soil, and finally from 29,6936 mg/Kg to 23,3249 mg/Kg on soil burned several times (at least 2 – 3 times). The content of available ammonium ions on unburned soil resulted to be of 16,5023 mg/Kg, of 21,0386 mg/Kg on once burned soil, and finally of 18,5005 mg/Kg on soil burned several times (at least 2 – 3 times). Based on the level of maturity, this peatland is fibric (still raw), with a fiber percentage greater than >75%.