This research focused on the ability of plants to hydroponically treat digested industrial sludge contaminated with chromium (Cr), cadmium (Cd) and nickel (Ni). Analysis were conducted using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) to measured the content of heavy metals. The anaerobic sludge was obtained from the wastewater treatment lagoon located near rubber factory wastewater treatment plant. Scindapsus Pictus Var Argyaeus species was planted in hydroponic pots placed under transparent roof to simulate the natural environment. The pots were applied with 6.05 mg and 13.50 mg digested dried industrial sludge. The study was also to investigate the effect of pH and conductivity (EC) in the phytoremediation processses along the rhizosphere of Scindapsus Pictus Var Argyaeus. Generally the absorption of heavy metals by Scindapsus Pictus Var Argyaeus was in the order of Ni > Cr > Cd. The species could be able to remove 66% (3962 mg/kg DWplant-1)Ni, 19% (89 mg/kg DWplant-1) Cd and 53% (396 mg/kg DWplant-1) Cr from the hydroponics. The main factor of phytoremediation by the application with 6.05 mg and 13.50 mg sludge in this study were at pH 6.73±0.80 ; EC, 2.80±0.92 μS/cm and pH 6.80±0.67 ; EC, 3.20±1.44 μS/cm respectively
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