The Robusta coffee grounds residues to adsorb the heavy metal Lead (Pb) in the water Layout guide for using Microsoft Word

Lead (Pb) were toxic. Lead found in pipes, batteries, paint, dyes ceramic glaze, gasoline, and final waste disposal. The robusta coffee grouds residues had high carbon, nitrogen etc which can adsorb heavy metal. The purpose of this study is to analyze the robusta coffee grounds residues to adsorb the Pb in the water. The method of this research is a True Experimental using completely randomized design (CRD) method. There were control groups (C) and three treatments groups (T1; T2;T3; 5gram/litre; 8gram/litre; 10gram/litre) with six repetitions. The robusta coffee ground residues were contacted for 2 hours. Total samples were 24 samples which analyzed each parameter of the Pb with Atomic Adsorption Spectophotometry Analysis. The results showed that the more coffee ground residues that are exposed, increasingly turbid. The KS test showed that data were a normal distribution (sig = 0,324). One way ANOVA test; Turkey post Hoc showed that there was sig difference between the control and treatment (F = 4,326, Sig = 0,017). There were sig difference between control and treatment 2 and 3 (Sig = 0,019; Sig = 0,038). Robusta coffee grounds residues can reuse to adsorb the Pb pollution in the water. It can be a solution for treating the lead pollution in the water because of it easy to the application.