Effect of pyrolysis temperature of rice husks and corncobs on the concentration of heavy metals in leachate water

Biochar has the potential to remove heavy metal ions through the adsorption process. Corncobs and rice husks are agricultural waste that has the potential to be biochar. This research was aimed to decrease the concentration of lead metal from leachate liquid. The sample is taken from the Supit Urang landfills Malang City. The used method is an experimental method applying a completely randomized design. The method used in the collection of leachate wastes using a grab sampling method. Biochar is made from rice husk and corncobs with a high temperature of 600 °C, 700 °C while the low temperature is 300 °C, 400 °C, dried in an oven to determine the moisture content. The running process is carried out by entering biochar charcoal weighing 10 g in 100 ml of water leachate. When observing heavy metals, lead is carried out for 1 day at the 6th hours. After being separated, lead concentration was measured using atomic absorption spectrophotometer. As well as producing that the treatment of corncobs with a temperature of 400 °C can absorb the best Fe compared to the other treatments, the concentration of lead metal in wastewater has decreased significantly, because the carbon content of corncob is greater than that of rice husks