This research aims to determine the effect of variations in copper (Cu) concentration on the phytoremediation of kiambang plants (Salvinia molesta). The research method was carried out by measuring the absorbance value of Cu solutions at concentrations of 3 ppm, 6 ppm, 9 ppm, 12 ppm and 15 ppm for 7 days with measurement intervals every 2 days using a UV-Vis spectrophotometer at a wavelength of…