Fe leaching in the sludge sediment of the Prigi beach with Tessier-Microwave method
Cahyanti Wulan Suci, Anugrah Ricky Wijaya, Aman Santoso, Irma Kartika Kusumaningrum
Abstract
Fe in water is a material that is difficult to degrade, so it can last for a long time and stays in sediments. Fe in sludge is usually caused by anthropogenic factors, including industrial, port, and agricultural waste. Heavy metals in amounts above the threshold level can be dangerous for the aquatic ecosystems of living creatures in the vicinity. The Tessier-microwave method divides sediment into five fractions, the ion exchange fraction, the carbonate bound fraction, the reduction fraction, and the oxidation fraction are non-resistant fractions, while the residual fraction is the resistant fraction. Each fraction shows its attachment to sludge sediment sediments. This research was conducted to determine the concentration of Fe, fractionation, and distribution of Fe attachments in each fraction, and to find out the similarities of reactions that occur in sludge leaching in the Prigi Beach area. Heavy metal concentration in the sludge sediment of the Prigi beach areas on the resistant fraction was greater, which is an average percentage of attachment distribution of 74.91%, while the percentage of attachment to the non-resistant fraction was 25.09%. Fe is distributed in fractions 3, 4, and 5 with varying levels. Fe in the non-resistant fraction in only bound in the reduction and oxidation fractions. The high percentage of resistant fractions shows that the most significant contributor to Fe in Prigi comes from natural sources.