EFEKTIVITAS FITOREMEDIASI MENGGUNAKAN TANAMAN KAYU APU, KIAMBANG, DAN ECENG GONDOK DALAM MENURUNKAN KADAR KROMIUM PADA LIMBAH CAIR PENYAMAKAN KULIT

Abstract

Indonesia is one of the countries with a rapidly growing industrial sector. Garut Regency is one of the regions famous for its leather tanning industry. In addition, the leather tanning industry produces large amounts of wastewater containing chemicals, one of which is chromium. This study aims to analyze the effectiveness of water lettuce, kiambang, and water hyacinth in reducing chromium levels in later tanning wastewater. The samples were taken from the sedimentation pond of a leather tanning insudtry in Sukaregang, Garut, with a concentration of 40% and phytoremediation was carried out for 7 days using water lettuce, kiambang, and water hyacinth, each weighing 300 grams with 6 replications. This study employed an experimental method with a pre and post test design. The independent variable was the type of plant, while the dependent variable was the chromium concentration. Data were collected by measuring chromium levels before and after treatment using the Flame Atomic Absorpyion Sprectophotometer (AAS). The kruskall-wallis test showed that there was a significant difference in chromium levels before and after phytoremediation using water lattuce, kiambang, and water hyacinth ( p≤ 0,05). The post hoc Dunn test further indicated significant differences in chromium reduction between the control group and water lettuce, the control group and water hyacinth, as well as between water lettuce and kiambang (p≤ 0,05).