Utilization of bamboo water plant (Equisetum hyemale) in reducing chemical oxygen demand level of laboratory waste

Laboratory as one of the supporting facilities of learning activities in various educational institutions, both at the primary level, intermediate and at higher education level, including in the Faculty of Health, Dian Nuswantoro University.  As one of the indicators of laboratory waste pollution is the parameter of chemical oxygen demand. Utilization of bamboo water plant (Equisetum hyemale) as a remediation agent is an alternative treatment. Experiments were conducted experimentally using a completely randomized design with 75 plants, 150 plants, and 225 plants 3 and treatment (0 hours, 48 hours, 60 hours and 72 hours), by measuring the decrease in chemical oxygen demand concentrations. The best result was aimed at second treatment with chemical oxygen demand degraded is 430 ppm with regression equation rate y = 137x - 190 with best degradation ability. While treatment 1 with the amount of chemical oxygen demand degraded 10 ppm with the equation of degradation rate was y = 36x - 3, and treatment 3 with 334 ppm degraded chemical oxygen demand with degradation rate y = 112x – 151. Based on the analysis result showed   Equisetum hyemale has been proven to be used as a phytoremediation agent which is quite effective in reducing the level of chemical oxygen demand, the most effective reduction of the concentration of chemical oxygen demand was found in the final treatment results using Equisetum hyemale 150 rods with the equation model y = 137x - 190 with R2 = 0.85.