Penggunaan <i>Echinodorus radicans</i> dan <i>Pistia stratiotes</i> untuk fitoremediasi air tercemar timbal (Pb) serta pengaruhnya terhadap tanaman <i>Amaranthus tricolor</i>

The existence of industries can cause severe environmental pollution. The impact of environmental pollution can be reduced by phytoremediation by using aquatic plants such as <i>Echinodorus radicans</i> and <i>Pistia stratiotes</i>. This study was aimed to determine the potential of aquatic plants <i>Echinodorus radicans</i> and <i>Pistia stratiotes</i> as lead (Pb) remediators. This study used a completely randomized design with six treatments, i.e. T0F1 (without plant/control 2 ppm), T0F2 (without plant/control 4 ppm), T1F1 (<i>Echinodorus radicans</i> 2 ppm), T1F2 (<i>Echinodorus radicans</i> 4 ppm), T2F1 (<i>Pistia stratiotes</i> 2 ppm), and T2F2 (<i>Pistia stratiotes</i> 4 ppm). The result of this research indicated that T2F2 (<i>Pistia stratiotes</i> 4 ppm) treatment reduced Pb by 92,53% which was higher than T1F2 (<i>Echinodorus radicans</i> 4 ppm) treatment of 89,59%. <i>Pistia stratiotes</i> more effectively reduced Pb content than <i>Echinodorus radicans</i>. Pb contaminated water that was previously used for growing <i>Echinodorus radicans</i> and <i>Pistia stratiotes</i> could be safely used for watering spinach plant (<i>Amaranthus tricolor</i>) to improve its growth.